Body FORD FESTIVA 1991 User Guide

article. Install timing belt and covers. Install cam cover. On non-turbo engines, connect front exhaust pipe to exhaust manifold. Tighten
nuts to specification.
4. On turbocharged engines, install exhaust manifold and turbocharger assembly. Install ground wire and strap to cylinder head with
retaining bolts. Connect intercooler tubes (if equipped). Connect O2 sensor connector, and install ground wires to bracket on cylinder
head with retaining screw. Connect main engine harness connector. Connect fuel lines to fuel filter and pressure regulator. Install
throttle cable and retaining brackets.
5. Install coolant hoses and vacuum lines to intake manifold and throttle body. Install coolant hose to thermostat cover. Install intake air
tube to air cleaner. Install spark plug wires and retainers. Install intake air tube to throttle body, and connect by-pass hoses. Fill cooling
system. Connect negative battery terminal. Start engine, check for leaks and system operation.
TIMING BELT COVER
Removal & Installation (1.3L)
Remove accessory belts. Remove water pump pulley. Remove crankshaft damper. Remove bolts retaining upper and lower cover halves to
engine front. Remove both covers. To install, reverse removal procedure.
Removal & Installation (1.6L)
Raise vehicle on hoist. Remove RF tire and wheel assembly. Remove RF splash guard. Lower vehicle. Remove spark plugs and set camsh aft
timing to TDC No. 1 cylinder. Remove oil dipstick. Remove water pump pulley. Remove crankshaft pulley, damper and baffle plate. Remove
upper timing belt cover. Remove center and lower timing belt covers. To install, reverse removal procedure.
TIMING BELT
Removal (1.3L)
Remove accessory belts, water pump pulley, crankshaft damper and upper and lower timing belt covers. Mark timing belt direction of rotation
for installation reference. Remove timing belt tensioner pulley bolt. Remove tensioner pulley, spring and spring cover. Remove timing belt.
Installation (1.3L)
1. Ensure timing belt and sprockets are clean and not worn or damaged. Align crankshaft and camshaft timing marks. See Fig. 3 . No. 1
cylinder must be at TDC of compression stroke.
2. Position belt on camshaft sprocket. Install timing belt tensioner spring, spring cover and pulley. Tighten tensioner pulley bolt to
specification. See TORQUE SPECIFICATIONS
table at end of article. To complete installation, reverse removal procedure. Tighten
all bolts and nuts to specification.

Fig. 3: Aligning Camshaft & Crankshaft Timing Marks (1.3L)

Courtesy of FORD MOTOR CO.
Removal (1.6L)
NOTE:Always rotate engine in direction of norm al operation. Rotating crankshaft backwards m ay cause belt to
jump timing.
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Fig. 8: Identifying Oil Pan Sealing Points

Courtesy of FORD MOTOR CO.
OVERHAUL
VALVE SPRINGS
Measure valve springs squareness and free length. Replace spring if either measurement is out of specification. See, at end of article, VALVES
& VALVE SPRINGS table in ENGINE SPECIFICATIONS.
VALVE STEM INSTALLED HEIGHT
Measure protruding length of each valve stem. See VALVE STEM INSTALLED HEIGHT table. If length is at service limit, use valve spring
shims to bring measurement within range of acceptable limit. If length is greater than service limit, replace valve seat or cylinder head.
VALVE STEM INSTALLED HEIGHT
VALVE GUIDES
Remove cylinder head, camshaft(s) and valves. Check valve stem-to-guide oil clearance. If clearance exceeds specification, replace valve
guides and/or valves. See CYLINDER HEAD
table under ENGINE SPECIFICATIONS at end of this article.
ROCKER ARM SHAFT ASSEMBLY (1.3L)
Remove valve cover. Keep components in order of removal to ensure reassembly to original position. Remove rocker arm shaft retaining bolts
and rocker arm shaft assembly. To install, reverse removal procedure.
VALVE LASH ADJUSTERS (1.3L)
Warm engine to normal operating temperature. Remove valve cover. Inspect hydraulic lash adjuster operation by pushing each rocker arm
down by hand. If rocker arm moves downward, replace hydraulic lash adjuster. Adjustment on valve lash adjusters is NOT possible or
necessary.
CAM SHAFT(S) (1.6L)
Remove cam cover. Remove camshaft(s). Keep components in order of removal to ensure reassembly to original position. To install, reverse
removal procedure.
VALVE LASH ADJUSTERS (1.6L)
Inspect friction surfaces for wear and damage. Hold bucket body (each adjuster) and press between thumb and forefinger. If plunge r mo ve s,
ApplicationIn. (mm)
1.3L
New1.520-1.539 (38.6-39.1)
Acceptable Limit1.539-1.579 (39.2-40.1)
Service Limit1.579 (40.1)
1.6L
New1.713-1.732
Acceptable Limit1.7732-1.772 (44-45)
Service Limit1.772 (45)
NOTE:For additional valve specifications, see, at end of this article, VALVES & VALVE SPRINGS
table under
ENGINE SPECIFICAT IONS.
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2. Remove main bearing cap bolts. Remove cap and lower bearing insert. Use bearing remover or fabricated cotter key to remove upper
bearing insert. Insert bearing remover in journal lubrication hole. Rotate crankshaft in normal direction of operation only. Repeat
procedure for remaining main bearings.
3. Check bearings for abnormal wear. Check crankshaft for grooves, scratches and pitting. Using Plastigage method, check clearance of
main bearing-to-crankshaft. Always keep at least 2 bearings and caps tight during clearance check. See, at end of article,
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
table under ENGINE SPECIFICATIONS.
4. Lubricate and install new bearings in cap and block. Match bearing tangs with notch in cap and block. Position cap in its proper
location and position. Install cap bolts and tighten to specification. See TORQUE SPECIFICATIONS
table at end of article. Repeat
procedure for remaining main bearings.
CRANKSHAFT END PLAY
Check crankshaft end play with dial indicator. End play should be .0031-.0111" (.08-.282 mm). Service limit is .012" (.30 mm). If end play is
not within specification, replace thrust bearings as necessary.
CYLINDER BLOCK
1. Using straightedge and feeler gauge, check entire cylinder head surface of cylinder block. Ensure warpage does not exceed .006" (.15
mm). If warpage exceeds specification, cylinder block surface can be machined a maximum of .008" (.20 mm).
2. Replace cylinder block if it needs to be machined more than .008" (.20 mm). Check cylinder bore for wear, out-of-round, taper and
piston fit. See CYLINDER BORE SPECIFICATIONS
table. Oversize pistons are available in .010" and .020" (.25 mm and .50 mm).
CYLINDER BORE SPECIFICATIONS
LUBRICATION
ENGINE OILING SYSTEM
Oiling system is force-feed type and uses a full-flow oil filter. Oil is retrieved from oil pan by oil pump pick-up tube and distributed to oil
filter. Oil is then filtered and routed throughout engine.
Crankcase Capacity
1.3 L crankcase capacity is 3.2 qts. (3.0 L) without filter change and 3.6 qts. (3.4 L) with filter change. For 1.6 L vehicles, capacity is 3.2 qts
(3.2 L) without filter and 3.72 qts. (3.5 L) with filter.
Normal Oil Pressure (Hot)
Normal oil pressure is 50-64 psi (3.5-4.5 kg/cm2 ) at 3000 RPM.
Pressure Regulator Valve
Pressure regulator valve is located in oil pump body and is nonadjustable.
OIL PUMP
Removal
Remove oil pan, pick-up tube and screen, timing belt and crankshaft sprocket. Remove front engine cover bolts and remove front cover.
R e mo ve b o l t s r e t a in in g p u mp c o ve r t o b a c k sid e o f fr o n t c o ve r h o u sin g.
2) Remove pump cover and inner and outer gears. Pry out front seal from front cover. Remove cotter pin. Remove pressure regulator retainer,
spring and valve.
OIL PUMP SPECIFICATIONS or replacem ent.
ApplicationIn. (mm)
Cylinder Diameter
Standard Bore
1.3L2.7953-2.7960 (71.000-71.019)
1.6L3.0709-3.0716 (78.000-78.019)
Maximu m Bo re
1.3L2.8020 (71.17)
1.6L3.0905-3.0913 (78.500-78.519)
Maximu m Ou t -Of-Ro u n d & Tap er.0007 (.019)
Piston-To-Bore Clearance.006 (.15)
ApplicationIn. (mm)
Inner Gear-To-Outer Gear
1.3L.008 (.20)
1.6L.0008-.0063 (.02-.16)
Outer Gear-To-Housing
1.3L.009 (.22)
1.6L.0035-.0071 (.09-.18)
End Play
1.3L.006 (.14)
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Installation
1. Install pressure regulator valve, spring, retainer and new cotter pin. Press a new seal in front cover housing. Install outer and inner gears
in housing. Install pump cover. Coat bolts with Loctite and tighten to specification. See TORQUE SPECIFICATIONS
table at end of
article.
2. Install new gasket and install front cover housing. Install new gasket and install pick-up tube and screen. Tighten all bolts/nuts to
specification. To complete installation, reverse removal procedure.
ENGINE COOLING
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
1.6L.0012-.0043 (.03-.11)
NOTE:Refer to WAT ER PUMP
under REMOVAL & INSTALLATION in this article.
ApplicationFt. Lbs. (N.m)
"A" Arm Front Bolt72-86 (97-117)
A/C Compressor Bolt29-40 (39-54)
Camshaft Sprocket Bolt36-45 (49-61)
Connecting Rod Nut
Step 111-13 (15-18)
Step 2
1.3L22-25 (30-34)
1.6L35-38 (47-52)
Crankshaft Pulley Bolts9-13 (12-17)
Crankshaft Sprocket Bolt80-87 (108-118)
Crossmember-To-Body Bolt
1.3L47-66 (64-89)
1.6L27-37 (35-50)
Cylinder Head Bolt
Step 135-40 (48-54)
Step 256-60 (76-81)
Exhaust Manifold-To-Cylinder Head
1.3L12-17 (16-23)
1.6L29-42 (39-57)
Exhaust Pipe-To-Manifold29-42 (39-57)
Exhaust Pipe-To-Support Bracket32-45 (43-61)
Flywheel Bolt71-76 (96-103)
Front Cover Housing Bolt (1.3L)14-19 (19-26)
Front Engine Mount Nut32-38 (43-52)
Heater Tube32-45 (43-61)
Intake Manifold-To-Cylinder Head
1.3L14-20 (19-27)
1.6L47-66 (64-89)
Main Bearing Cap Bolts40-44 (54-59)
O2 Sensor27-33 (37-45)
Oil Pump Cover Bolt (1.6L)14-18 (19-25)
P/S Pump Bracket (Nut & Bolt)35-49 (47-66)
P/S Adjusting Nut27-38 (37-52)
P/S Pivot Bolt23-34 (31-46)
Pulse Air Tube Nut23-34 (31-46)
Rear Engine Mount Nut
1.3L21-34 (28-46)
1.6L47-66 (64-89)
Rocker Arm Shaft Bolts16-21 (22-28)
Side Engine Mount Nuts
1.3L29-40 (39-54)
1.6L
RH49-67 (67-91)
LH33-48 (45-65)
Spark Plug11-17 (15-23)
Thermostat Housing Bolt14-22 (19-30)
Timing Belt Tensioner Adjusting Bolt14-19 (19-26)
Turbo Oil Supply Tube
Engine Block Side12-18 (16-24)
Banjo Side(1) 106-159 (12-18)
Turbo-To-Manifold29-42 (39-57)
Water Outlet Bolt14-22 (19-30)
Water Pump Pulley Bolts (1.3L)36-45 (49-61)
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Fig. 3: Testing Voltage Drop

Courtesy of FORD MOTOR CO.
STARTER GROUND CIRCUIT TEST
1. Disconnect and ground coil wire from distributor cap to prevent engine from starting. Connect remote starter switch between starter
solenoid terminal "S" and battery positive terminal. See Fig. 1
.
2. Using a digital voltmeter set on low scale, connect positive voltmeter to starter motor housing. Ensure connection point is clean and free
of rust and grease. Connect negative voltmeter lead to negative battery terminal.
3. Engage remote starter switch and crank engine. Observe and record voltmeter reading. Voltmeter should read .2 volt or less. If voltage
drop is greater than .2 volt, clean negative battery cable connections at battery and body connections. Retest to ensure problem has been
corrected.
4. If voltage drop is still excessive, replace negative battery cable(s) as necessary. If battery cables test okay, and starter still cranks slowly
or not at all, remove and repair starter motor.
BENCH TESTING
STARTER NO-LOAD TEST
Remove starter. Place starter on bench. Connect a fully charged 12-volt battery, voltmeter, ammeter and remote starter switch to starter. See
Fig. 4
. Engage remote starter switch. Starter should rotate smoothly. Ensure voltage and amperage draw is less than maximum specification at
5000 RPM minimum. See NO-LOAD TEST SPECIFICATIONS table. If voltage and/or amperage is higher than specifications, disassemble
starter and determine cause.
NO-LOAD TEST SPECIFICATIONS
NOTE:Make all voltm eter connections at com ponent term inal rather than at cable or wire end.
ApplicationMaximum AmpsVolts
Capri & Festiva6011.5
Page 3 of 6 MITCHELL 1 ARTICLE - STARTER 1991 ELECTRICAL Starters
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SOLENOID TEST
Disconnect wiring and cables from solenoid. Using an ohmmeter, check for continuity between terminal "M" and body of starter solenoid. See
Fig. 1
. Continuity should exist. If continuity does not exist, replace solenoid.
ARMATURE TEST
1. Place armature in growler. Turn on growler and hold a piece of hacksaw blade over armature. Slowly rotate armature. If hacksaw blade
is attracted to core or if it vibrates, replace armature.
2. Remove armature from growler. Using an ohmmeter, check continuity between commutator and core. If continuity exists, replace
armature. Check continuity between commutator and shaft. If continuity exists, replace armature.
3. Check continuity between each commutator segment. If an open exists between any 2 segments, replace armature.
COMMUTATOR TEST
1. Clean surface of commutator and polish with No. 400 grit sandpaper (if required). If surface is scored, out of round or pitted, turn
commutator on a lathe.
2. Maximum commutator runout and minimum diameter of commutator must not exceed specification after turning. See STARTER
MOTOR SPECIFICATIONS table.
3. Commutator mica undercut depth should be .02-.03" (.5-.8 mm). If undercut depth is not within specification, undercut with a hacksaw
blade to standard depth.
BRUSH & SPRING TEST
1. Connect ohmmeter between positive brush holder and negative brush holder. If ohmmeter indicates continuity, brush holder assemb l y is
shorted and must be replaced.
2. Check brush length. See STARTER MOTOR SPECIFICATIONS
table. If brush length is less than specification, replace brushes.
3. Check spring tension. Spring tension should be 2.0-4.3 Lbs. (8.8-19.1 N.m). Ensure brushes move freely in holders.
FIELD COIL TEST
1. Connect ohmmeter between field lead and soldered portion of brush lead. If continuity does not exist, repair or replace field coil.
2. Check field coil for shorts to ground by connecting ohmmeter between field lead and starter housing. If continuity exists, repair or
replace field coil.
OVERHAUL

Fig. 6: Exploded View of Starter Motor Assembly

Courtesy of FORD MOTOR CO.
STARTER MOTOR SPECIFICATIONS
STARTER MOTOR SPECIFICATIONS NOTE:For exploded view of starter assem bly, see Fig. 6
.
ApplicationSpecification
Brush Length
Minimum.45" (11.5 mm)
New.67" (17 mm)
Brush Spring Force2.0-4.3 Lbs. (8.8-19.1
N.m)
Commutator
Runout.002" (.05 mm)
Min imu m Diamet er1.22" (31.0 mm)
Segment Depth.02-.03" (.5-.8 mm)
Pinion Gap.020-.080" (0.5-2.0
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IDLE SPEED & MIXTURE
IDLE MIXTURE
IDLE SPEED
1. Turn off all accessories. Place automatic transmission in Park or manual transmission in Neutral. Set parking brake. Connect tachometer
to engine. Warm engine to normal operating temperature. Connect a jumper wire between single-wire STI test connector (Green on
Capri; Black on Festiva) and ground. See Fig. 1
.
2. Locate idle speed control by-pass air (ISC-BPA) valve on intake manifold. Remove cap, and adjust idle speed to specification by turning
idle air adjust screw on ISC-BPA valve. See Fig. 2
. Remove jumper wire.
IDLE RPM

Fig. 2: Locating Idle Air Adjust Screw

Courtesy of FORD MOTOR CO.
THROTTLE POSITION SWITCH (TP)
CAPRI
Throttle position sensor is preset at factory. No adjustment is required.
FESTIVA
1. Ensure idle speed and ignition timing are adjusted to specification. Stop engine. Disconnect negative battery cable.
2. Unplug TP connector at throttle body. Insert appropriate feeler gauge between throttle stop screw and stop lever. Check for continuity
between specified terminals on TP connector. See TP ADJUSTMENT table.
3. To adjust, loosen TP attaching screws. Connect ohmmeter between terminals IDL and TL. See Fig. 3
. Insert a .020" (.5 mm) feeler
gauge between throttle stop screw and stop lever.
4. Rotate TP until ohmmeter indicates continuity. Insert a .028" (.7 mm) thickness gauge between stop screw and stop lever. Ohmmeter
should indicate no continuity. If ohmmeter indicates continuity, repeat adjustment procedure.
ApplicationAuto. Trans.Man. Trans.
1.3L9-11 @ 8509-11 @ 700
1.6L Non-Turbo1-3 @ 8500-4 @ 850
1.6L Turbo10-14 @ 8500-4 @ 850
NOTE:Idle m ixture is controlled by ECA and is not adjustable.
ApplicationAuto. Trans.Man. Trans.
1.3L830-870680-720
1.6L800-900800-900
CAUT ION: DO NOT tam per with throttle stop screw at throttle lever. Doing so m ay result in dam age to throttle
body.
Page 2 of 3 MITCHELL 1 ARTICLE - D - ADJUSTMENTS 1991 ENGINE PERFORMANCE Ford/Mercury - On-Vehicle Adjustments
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Back To Article
A - ENGINE/VIN ID
1991 ENGINE PERFORMANCE Ford/Mercury - Introduction
APPLICATION
MODEL COVERAGE
VIN DEFINITION
Numbers preceding the explanations in the legend below refer to the sequence of characters as listed on VIN identification label.
SAMPLE VIN
Digit #: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17.
(VIN) K N J P T O 6 H 9 L 6 1 0 0 0 0 0.
VIN Definition
1-3 - Indicates Nation of Origin.
4 - Indicates Restraint System.
5 - Indicates Carline Code.
6-7 - Indicates Body Type.
8 - Indicates Engine Type.
9 - Indicates Check Digit.
10 - Indicates Model Year.
11 - Indicates Assembly Plant.
12-17 - Vehicle Serial Number.
ENGINE CODE LOCATION

Fig. 1: Engine Code Location

Courtesy of FORD MOTOR CO.
MODEL YEAR VIN CODE APPLICATION
ModelBody CodeEng. Type (1) Eng. IDFuel Sys.Ign. Sys.
Capri011.6LZPFIMagnetic
Capri011.6L Turbo6 (2) PFIMagnetic
Festiva05, 06, 071.3LHPFIMagnetic
(1)See vehicle engine code label affixed to timing belt cover, See Fig. 1 .
(2)XR2 model W/intercooled turbo.
VIN CodeModel Year
L1990
M1991
Copyr ight 2009 Mit chell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00022694
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ELECTRONIC CONTROL ASSEMBLY (ECA)
REMOVAL & INSTALLATION
Disconnect negative battery cable. On Festiva, from under instrument panel, remove heater duct. On Capri, disengage push-pin retainers by
pulling back on front edges of both center carpet panels. Remove carpet panel retaining screws and panels. Disconnect ECA wire harness
connector. Remove ECA bolts and ECA. To install, reverse removal procedure. On Festiva, ensure mounting clip is inserted into bulkhead
recess.
FUEL SYSTEM
FUEL SYSTEM PRESSURE RELEASE
Remove rear seat assembly. With engine running, disconnect fuel pump connector. Run engine until it stalls to relieve fuel line pressure.
FUEL INJECTORS
Removal
Relieve fuel system pressure. On Capri, remove throttle body. On Festiva, remove intake plenum. See INTAKE PLENUM. Remove fuel inlet
and fuel return line from fuel rail. Remove electrical connectors from injectors. Remove pressure regulator. See Fig. 4
. Remove fuel rail
attaching bolts and fuel rail. Remove fuel injectors.
Installation
Install NEW "O" rings on fuel injectors and lubricate with gasoline. Install fuel injectors into cylinder head. Install fuel rail onto fuel injectors.
Install fuel rail attaching bolts. To complete installation, reverse removal procedure. Check system for leaks.

Fig. 4: Exploded View of Fuel Control System

Courtesy of FORD MOTOR CO.
FUEL PUMP
Removal
Remove fuel tank sending unit. Remove fuel filter from pump. Remove fuel pump wires from sending unit. Remove retaining clamp screw and
clamp. Remove rubber retaining band (if equipped). Remove fuel pump from sending unit.
Installation
To install, reverse removal procedure. Check system for leaks.
INTAKE PLENUM WARNING:ALWAYS relieve fuel pressure before disconnecting any fuel injection-related com ponent. DO NOT
allow fuel to contact engine or electrical com ponents.
WARNING:ALWAYS relieve fuel pressure before disconnecting any fuel-related com ponent. DO NOT allow fuel to
contact engine or electrical com ponents.
Page 3 of 5 MITCHELL 1 ARTICLE - N - REMOVE/INSTALL/OVERHAUL 1991 ENGINE PERFORMANCE Ford/Mercury Removal, O
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Removal
Drain radiator and remove negative battery cable. Disconnect throttle cable. Remove air duct from throttle body. Disconnect throttle position
sensor/switch connector. Mark all coolant and vacuum hoses for reassembly reference and remove from throttle body. See Fig. 4
. Remove
intake plenum bolts and remove intake plenum and gasket.
Installation
To install, reverse removal procedure. Use NEW intake plenum-to-intake manifold gasket. Tighten bolts to specification, see TORQUE
SPECIFICATIONS at end of article.
OXYGEN (O2) SENSOR
Removal & Installation
Disconnect negative battery cable. Disconnect wire harness connector, and remove oxygen sensor. If exhaust sensor is difficult to remove, use
rust penetrant to avoid possible damage to exhaust threads. If new sensor is not pre-coated with anti-seize, apply anti-seize compound to
sensor threads. DO NOT remove anti-seize from sensor. To install, tighten sensor and attach wire harness connector.
THROTTLE BODY
Removal & Installation
Drain radiator and remove negative battery cable. Remove resonance chamber. Disconnect throttle cable. Remove air duct. Mark all coolant
and vacuum hoses for reassembly reference and remove from throttle body. Disconnect throttle position sensor/switch connector. Remove
throttle body nuts and bolts. Remove throttle body and gasket. To install, reverse removal procedure using NEW throttle body-to-intake
plenum gasket.
THROTTLE POSITION SENSOR/SWITCH
Removal & Installation
Disconnect negative battery cable. Disconnect throttle position sensor/switch connector. Remove attaching bolts. Remove sensor/switch from
throttle body. To install, reverse removal procedure.
TURBOCHARGER
Removal
1. Drain radiator and remove negative battery cable. Remove throttle body air intake tube. Disconnect intercooler hose from turbocharger
assembly. Disconnect O2 sensor. Remove lower heat shield retaining bolts and lower heat shield from turbocharger. Remove upper heat
shield retaining bolts and upper heat shield from exhaust manifold.
2. Slide O2 sensor wire and guide through upper heat shield. Remove side heat shield retaining bolts from turbocharger, and remove sid e
heat shield. Remove power steering belt. Remove power steering pump through bolt and adjuster nuts and bolts. Disconnect lower
radiator hose from water pump.
3. Pull pump from bracket, and position pump to access mounting bracket retaining nut and bolts. Remove mounting bracket-to-engine nut
and bolts and remove bracket. Remove air cleaner duct retaining screws. Loosen clamp at turbocharger and move duct tube out of way.
Disconnect coolant supply hose at turbocharger.
4. Remove bolt and sealing washers attaching oil supply line at engine block. Raise vehicle on hoist. Remove nuts and washers from
exhaust pipe flange. Remove bolts attaching exhaust hanger to engine block. Slide rubber exhaust hangers from catalytic converter. Pull
exhaust pipe downward and to left side of vehicle. Disconnect oil return hose from turbocharger. Disconnect coolant return hose fro m
turbocharger.
5. Remove turbocharger support bracket retaining bolts. Remove coolant by-pass tube outlet-to-water pump bolts. Lower vehicle. Loosen
retaining clamp bolt on coolant by-pass tube at rear of cylinder head. Remove 11 retaining nuts from exhaust manifold. Position coolant
by-pass tube out of way after pulling bracket from exhaust stud.
6. Remove exhaust manifold by pulling off studs and moving assembly towards right side of engine compartment, clearing cooling fan.
With assembly removed from vehicle, remove turbocharger-to-exhaust manifold nuts. Separate assembly and discard gasket.
Installation
1. Install NEW gasket on exhaust manifold and install turbocharger onto studs. Install turbocharger-to-exhaust manifold nuts. Remo ve o il
supply line from turbocharger. Install NEW exhaust gasket on cylinder head. Install turbocharger and exhaust manifold assembly onto
studs. Install coolant by-pass tube bracket onto exhaust stud. Install 11 retaining nuts onto exhaust manifold.
2. Securely tighten heater tube clamp bolt. Raise vehicle. Install coolant by-pass tube outlet-to-water pump bolts. Install turbocharger
support bracket retaining bolts. Connect coolant return hose to turbocharger. Connect oil return hose to turbocharger. Install exhaust
pipe onto turbocharger, and hand tighten nuts and washers. Install bolts attaching exhaust hanger to engine block.
3. Slide rubber exhaust hangers onto catalytic converter. Tighten exhaust pipe nuts and washers. Lower vehicle. Install bolt and sealing
washers attaching oil supply line at engine block. Install oil supply line onto turbocharger. To complete installation, reverse removal
procedure. Tighten bolts and nuts to specification, see TORQUE SPECIFICATIONS
at end of article. NOTE:T o prevent dust and dirt from entering intake m anifold ports, cover ports with clean cloth after
rem oving intake plenum .
WARNING:DO NOT rem ove oxygen sensor when engine is hot.
NOTE:Clean throttle body exterior before rem oval.
CAUT ION: Before installing turbocharger, put .8 oz. (25 m l) engine oil into turbocharger oil inlet.
Page 4 of 5 MITCHELL 1 ARTICLE - N - REMOVE/INSTALL/OVERHAUL 1991 ENGINE PERFORMANCE Ford/Mercury Removal, O
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