service DODGE NEON 2000 Service Repair Manual

CRANKSHAFT
A nodular cast iron crankshaft is used. The engine
has five main bearings. The number three main is
flanged to control thrust. The mains and connecting
rod journals have undercut fillet radiuses that are
deep rolled for added strength. To optimize bearing
loading, eight counterweights are used. Hydrody-
namic seals provide end sealing, where the crank-
shaft exits the block. Anaerobic gasket material is
used for parting line sealing. A sintered iron timing
belt sprocket is mounted on the crankshaft nose. This
sprocket transmits crankshaft movement, via timing
belt to the camshaft sprocket providing timed valve
actuation.
PISTONS
The engineDOES NOThave provision for a free
wheeling valve train. Non free wheeling valve train
means, in the event of a broken timing belt pistons
will contact the valves. The engine uses pressed-in
piston pins to attach forged powdered metal connect-
ing rods. The connecting rods are a cracked cap
design and are not repairable. Hex head cap screw
are used to provide alignment and durability in the
assembly. Pistons and connecting rods are serviced as
an assembly.
PISTON RINGS
The piston rings include a molybdenum faced top
ring for reliable compression sealing and a taper
faced intermediate ring for additional cylinder pres-
sure control. Oil Control Ring Package consist of two
steel rails and an expander spacer.
CYLINDER HEAD
The aluminum cylinder head features a Single
Over Head Camshaft (SOHC), four-valves per cylin-
der, cross flow design. The valves are arranged in
two inline banks, with the two intake per cylinder
facing toward the radiator. The exhaust valves facing
toward the dash panel. Rocker arm shafts mount
directly to the cylinder head. It incorporates powder
metal valve guides and seats. The hollow rocker arm
shafts supplies oil to the hydraulic lash adjusters,
camshaft and valve mechanisms.
CAMSHAFT
The nodular iron camshaft has five bearing jour-
nals and three cam lobes per cylinder. Provision for a
cam position sensor is provided on the camshaft at
the rear of cylinder head which also acts as thrust
plate. A hydrodynamic oil seal is used for oil control
at the front of the camshaft.
VALVES
Four valves per cylinder are actuated by roller
rocker arms/hydraulic lash adjusters assemblies
which pivot on rocker arm shafts. All valves have
chrome plated valve stems. Viton rubber valve stem
seals are integral with spring seats. Valve springs,
spring retainers, and locks are conventional design.
INTAKE MANIFOLD
The intake manifold is a molded plastic composi-
tion, attached to the cylinder head with five fasten-
ers. This long branch design enhances low and mid-
range torque.
EXHAUST MANIFOLD
The exhaust manifold is made of nodular cast iron
for strength and high temperatures. Exhaust gasses
exit the manifold into an articulated joint connection
and exhaust pipe.
COMPONENT REPLACEMENT
If any of the following parts have been changed or
replaced:
²Camshaft
²Camshaft Position Sensor
²Camshaft Position Sensor Target Magnet
²Cylinder Block
²Cylinder Head
²Water Pump
²Powertrain Control Module (PCM)
²Timing Belt and Timing Belt Tensioner
The camshaft and crankshaft timing relearn proce-
dure must be performed. Refer to the component
Removal and Installation procedure in this section.
9 - 16 2.0L SOHC ENGINEPL
DESCRIPTION AND OPERATION (Continued)

der head. The rocker shafts route oil to the rocker
arms/hydraulic lash adjuster assemblies.
SPLASH LUBRICATION
Oil returning to the pan from pressurized compo-
nents supplies lubrication to the valve stems. Cylin-
der bores and wrist pins are splash lubricated from
directed slots on the connecting rod thrust collars.
DIAGNOSIS AND TESTING
CHECKING ENGINE OIL PRESSURE
(1) Remove oil pressure switch and install gauge
assembly C-3292 with adaptor.
(2) Run engine until thermostat opens.
CAUTION: If oil pressure is 0 at idle, Do Not per-
form the 3000 RPM test in the next step.
(3) Oil Pressure:Curb Idle25 kPa (4 psi) mini-
mum3000 RPM170-550 kPa (25-80 psi).
(4) If oil pressure is 0 at idle. Shut off engine,
check for pressure relief valve stuck open, a clogged
oil pick-up screen or a damaged oil pick-up tube
O-ring.
SERVICE PROCEDURES
CYLINDER BORE AND PISTON SIZING
The cylinder walls should be checked for out-of-
round and taper with recommended tool C-119 or
equivalent (Fig. 3). The cylinder bore out-of-roundand cylinder bore taper must within service limits.
Refer to Engine Specifications in this section. If the
cylinder walls are badly scuffed or scored, the cylin-
der block should be rebored and honed, and new pis-
tons and rings fitted. Whatever type of boring
equipment is used, boring and honing operations
should be closely coordinated with the fitting of pis-
tons and rings in order to maintain specified clear-
ances.Refer to Honing Cylinder Bores in the
Standard Service Procedures for procedures.
Measure the cylinder bore at three levels in direc-
tions A and B (Fig. 3). Top measurement should be
10 mm (3/8 inch) down and bottom measurement
should be 10 mm (3/8 inch.) up from bottom of bore.
Refer to Engine Specifications in this section for cyl-
inder block specifications.
SIZING PISTONS
Piston and cylinder wall must be clean and dry.
Piston diameter should be measured 90 degrees to
piston pin about 17.5 mm (11/16 inch) from the bot-
tom of the skirt as shown in (Fig. 4). Cylinder bores
should be measured halfway down the cylinder bore
and transverse to the engine crankshaft center line
shown in (Fig. 3). Correct piston to bore clearance
must be established in order to assure quiet and eco-
nomical operation. Refer to Engine Specifications in
this section for cylinder block and piston specifica-
tions.
DaimlerChrysler engines use pistons designed spe-
cifically for each engine model. Clearance and sizing
locations vary with respect to engine model.
Fig. 2 Engine Lubrication SystemÐ SOHC
Fig. 3 Checking Cylinder Bore Size
9 - 18 2.0L SOHC ENGINEPL
DESCRIPTION AND OPERATION (Continued)

NOTE: Pistons and cylinder bores should be mea-
sured at normal room temperature, 21ÉC (70ÉF).
FITTING PISTON RINGS
(1) Wipe cylinder bore clean. Insert ring and push
down with piston to ensure it is square in bore. The
ring gap measurement must be made with the ring
positioned below normal ring travel in the cylinder
bore. Check gap with feeler gauge (Fig. 5). Refer to
Engine Specifications in this section for piston ring
specifications.
(2) Check piston ring to groove side clearance (Fig.
6). Refer to Engine Specifications in this section for
piston ring specifications.
FITTING CONNECTING RODS
(1) Follow the procedure specified in the Standard
Service Procedures Section for Measuring Main Bear-
ing Clearance and Connecting Rod Bearing Clear-ance (Fig. 7). Refer to Engine Specifications in this
section for connecting rod specifications.
CAUTION: Do not rotate crankshaft or the Plasti-
gage may be smeared.
NOTE: The rod bearing bolts should not be reused.
(2) Before installing theNEWbolts the threads
should be oiled with clean engine oil.
(3) Install each bolt finger tight than alternately
torque each bolt to assemble the cap properly.
(4) Tighten the bolts to 27 N´m PLUS 1/4 turn (20
ft. lbs. PLUS 1/4 turn)Do not use a torque
wrench for last step.
(5) Using a feeler gauge, check connecting rod side
clearance (Fig. 8). Refer to Engine Specifications in
this section for connecting rod specifications.
FITTING CRANKSHAFT BEARINGS
Refer to Measuring Main Bearing Clearance in
Standard Service Procedures. Refer to Engine Speci-
fications in this section for crankshaft specifications.
Fig. 4 Piston Measurements
1 ± PISTON O. D. MEASUREMENT LOCATION
Fig. 5 Piston Ring Gap
1 ± FEELER GAUGE
Fig. 6 Piston Ring Side Clearance
1 ± FEELER GAUGE
Fig. 7 Connecting Rod Bearing Clearance
PL2.0L SOHC ENGINE 9 - 19
SERVICE PROCEDURES (Continued)

CRANKSHAFT END PLAY
DIAL INDICATOR METHOD
(1) Mount a dial indicator to front of engine, locat-
ing probe on nose of crankshaft (Fig. 9).
(2) Move crankshaft all the way to the rear of its
travel.
(3) Zero the dial indicator.
(4) Move crankshaft all the way to the front of its
travel and read the dial indicator. Refer to Engine
Specifications in this section for crankshaft specifica-
tions.
FEELER GAGE METHOD
(1) Move crankshaft all the way to the rear of its
travel using a lever inserted between a main bearing
cap and a crankshaft cheek, using care not to dam-
age any bearing surface. Donotloosen main bearing
cap.(2) Use a feeler gauge between number three
thrust bearing and machined crankshaft surface to
determine end play.
REMOVAL AND INSTALLATION
TORQUE STRUTS
UPPER TORQUE STRUT
REMOVAL
(1) Remove bolts attaching strut to shock tower
bracket and engine mount bracket (Fig. 10).
(2) Remove the upper torque strut.
INSTALLATION
(1) Position the upper torque strut into mounting
locations.
(2) Install the mounting bolts and perform the
torque strut adjustment procedure.
LOWER TORQUE STRUT
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove right side splash shield.
(3) Remove bolts attaching lower strut to cross-
member and strut bracket (Fig. 10).
(4) Remove lower torque strut.
INSTALLATION
(1) Position lower torque strut into mounting loca-
tions.
(2) Install mounting bolts and perform torque
strut adjustment procedure.
(3) Install splash shield and lower vehicle
TORQUE STRUT ADJUSTMENT
The upper and lower torque struts need to be
adjusted together to assure proper engine positioning
and engine mount loading. Whenever a torque strut
bolt(s) is loosened, this procedure must be performed.
(1) Loosen the upper and lower torque strut
attaching bolt at the suspension crossmember and
shock tower bracket.
(2) The engine position may now be adjusted by
positioning a suitable floor jack on the forward edge
of the transmission bell housing (Fig. 11).
NOTE: The floor jack must be positioned as shown
in (Fig. 11) to prevent minimal upward lifting of the
engine.
Fig. 8 Connecting Rod Side Clearance
Fig. 9 Checking Crankshaft End PlayÐ Dial
Indicator
9 - 20 2.0L SOHC ENGINEPL
SERVICE PROCEDURES (Continued)

(27) Start engine and run until operating temper-
ature is reached.
(28) Ensure engine is properly positioned. Refer to
Torque Struts in this section for adjustment proce-
dure.
(29) Adjust transmission linkage, if necessary.
INTAKE MANIFOLD
REMOVAL
WARNING: RELEASE FUEL SYSTEM PRESSURE
BEFORE SERVICING FUEL SYSTEM COMPONENTS.
SERVICE VEHICLES IN WELL VENTILATED AREAS
AND AVOID IGNITION SOURCES. NEVER SMOKE
WHILE SERVICING THE VEHICLE.
(1) Disconnect negative cable from battery.
(2) Remove the inlet air duct from intake manifold
to throttle body.
(3) Perform fuel system pressure release procedure
before attempting any repairs.Refer to Group 14,
Fuel System for procedures.
WARNING: WRAP SHOP TOWELS AROUND FUEL
HOSE TO CATCH ANY GASOLINE SPILLAGE
(4) Disconnect fuel supply line quick connect at the
fuel tube assembly. Refer to Group 14, Fuel System
for procedures.
(5) Remove fuel rail assembly attaching screws
and remove fuel rail assembly from engine. Cover
injector holes with suitable covering.
CAUTION: Do not set fuel injectors on their tips,
damage may occur to the injectors
(6) Disconnect brake booster hose (Fig. 27) and
PCV hose (Fig. 28) from intake manifold.
(7) Disconnect Manifold Absolute Pressure (MAP)
sensor electrical connector (Fig. 29).
(8) Disconnect knock sensor electrical connector
(Fig. 30).
(9) Disconnect wiring at starter.
(10) Remove the intake manifold to lower support
bracket bolts (Fig. 31).
(11) Remove intake manifold screws and washers.
Discard the fasteners. Remove intake manifold.
INSTALLATION
Before installing manifold. Clean all mating sur-
faces. Replace all O-ring gaskets with new gaskets
(Fig. 33). All intake manifold fasteners and washers
are to be discarded andNEWfasteners and washers
are to be used.(1) Install intake manifold onto cylinder head and
tighten fasteners to 12 N´m (105 in. lbs.) in sequence
shown in (Fig. 32).
Fig. 27 Brake Booster Hose
Fig. 28 PCV Hose
9 - 28 2.0L SOHC ENGINEPL
REMOVAL AND INSTALLATION (Continued)

(5) Slide the rocker arms and spacers off the shaft.
Keep the spacers and rocker arms in the same loca-
tion for reassembly.
NOTE: Inspect the rocker arm for scoring, wear on
the roller or damage to the rocker arm (Fig. 49)
Replace if necessary. Check the location where the
rocker arms mount to the shafts for wear or dam-
age. Replace if damaged or worn. The rocker arm
shaft is hollow and is used as a lubrication oil duct.
Check oil holes for clogging with small wire, clean
as required. Lubricate the rocker arms and spacers.
Install onto shafts in their original position (Fig. 48).
INSTALLATION
CAUTION: Set crankshaft to 3 notches before TDC
before installing rocker arm shafts. Refer to Timing
Belt System and Camshaft Seal Service of this sec-
tion for procedure.
(1) Install rocker arm/hydraulic lash adjuster
assembly making sure that adjusters are at least
partially full of oil. This is indicated by little or no
plunger travel when the lash adjuster is depressed. If
there is excessive plunger travel. Place the rocker
arm assembly into clean engine oil and pump the
plunger until the lash adjuster travel is taken up. If
travel is not reduced, replace the assembly. Hydraulic
lash adjuster and rocker arm are serviced as an
assembly.(2) Install rocker arm and shaft assemblies with
NOTCH in the rocker arm shafts pointing up and
toward the timing belt side of the engine (Fig. 50).
Install the retainers in their original positions on the
exhaust and intake shafts (Fig. 48).
CAUTION: When installing the intake rocker arm
shaft assembly be sure that the plastic spacers do
not interfere with the spark plug tubes. If the spac-
ers do interfere rotate until they are at the proper
angle. To avoid damaging the spark plug tubes, do
not attempt rotating the spacers by forcing down
the shaft assembly.
(3) Tighten bolts to 28 N´m (250 in. lbs.) in
sequence shown in (Fig. 51).
(4) Install cylinder head cover. Refer to procedures
in this section.
Fig. 48 Rocker Arm Shaft Assemblies
1 ± EXHAUST ROCKER ARM ASSEMBLY
2 ± PLASTIC SHAFT SPACERS
3 ± INTAKE ROCKER ARM ASSEMBLY
4 ± ROCKER ARM SHAFT RETAINERS
Fig. 49 Rocker Arm Assemblies
1 ± EXHAUST ROCKER ARM
2 ± HYDRAULIC LASH ADJUSTERS
3 ± INTAKE ROCKER ARM
4 ± ROLLERS
Fig. 50 Rocker Arm Shaft Notches
1 ± NOTCHES FACING UP AND TOWARD THE TIMING BELT
SIDE OF THE ENGINE
PL2.0L SOHC ENGINE 9 - 35
REMOVAL AND INSTALLATION (Continued)

HYDRAULIC LASH ADJUSTER NOISE
A tappet-like noise may be produced from several
items. Refer to Lash Adjuster Noise - Diagnosis in
Standard Service Procedures, in this Group.Lash
adjusters are replaced with the rocker arm as
an assembly.
VALVE SEALS AND SPRINGSÐIN VEHICLE
REMOVAL
(1) Remove rocker arm shafts assemblies. Refer to
procedure in this section.
(2) Rotate crankshaft until piston is at TDC on
compression stroke.
(3) With air hose attached to adapter tool installed
in spark plug hole, apply 90-120 psi air pressure.
(4) Using Special Tool MD-998772A with adapter
6779 (Fig. 52) compress valve springs and remove
valve locks.
(5) Remove valve spring.
(6) Remove valve stem seal by using a valve stem
seal tool (Fig. 53).
INSTALLATION
(1) Install valve seal/valve spring seat assembly.
Refer to Valve Installation procedure in this section.
(2) Using Special Tool MD-998772A compress valve
springs only enough to install locks. Correct align-
ment of tool is necessary to avoid nicking valve stems
(air pressure required), piston at TDC.
(3) Install rocker arm shaft assemblies. Refer to
procedure in this section.
(4) Install cylinder head cover. Refer to procedure
in this section.
Fig. 51 Rocker Arm Shaft Tightening Sequence
Fig. 52 Valve SpringÐRemoving and Installing
1 ± VALVE SPRING COMPRESSOR SPECIAL TOOL MD-998772A
2 ± ADAPTER 6779
3 ± AIR HOSE
Fig. 53 Valve Stem Oil Seal Tool
1 ± VALVE SEAL TOOL
2 ± VALVE STEM
Fig. 54 Valve Spring Assembly
1 ± VALVE RETAINING LOCKS
2 ± VALVE SPRING
3 ± VALVE SEAL AND VALVE SPRING SEAT ASSEMBLY
4 ± VALVE SPRING RETAINER
9 - 36 2.0L SOHC ENGINEPL
REMOVAL AND INSTALLATION (Continued)

(10) Install right engine mount to engine mount
bracket through bolt.
(11) Remove jack from under engine.
(12) Install upper torque strut.
(13) Install power steering pump assembly.
(14) Raise vehicle and install lower torque strut.
(15) Install crankshaft damper using M12-1.75 x
150 mm bolt, washer, thrust bearing and nut from
Special Tool 6792. Install crankshaft damper bolt and
tighten to 142 N´m (100 ft. lbs.) (Fig. 77).
(16) Install accessory drive belts. Refer to Group 7,
Cooling System for procedures.
(17) Install right inner splash shield.
(18) Lower vehicle and perform camshaft and
crankshaft timing relearn procedure as follows:
²Connect the DRB scan tool to the data link
(diagnostic) connector. This connector is located in
the passenger compartment; at the lower edge of
instrument panel; near the steering column.
²Turn the ignition switch on and access the ªmis-
cellaneousº screen.
²Select ªre-learn cam/crankº option and follow
directions on DRB screen.
TIMING BELT TENSIONER
REMOVAL
(1) Remove timing belt. Refer to procedure in this
section.
(2) Remove tensioner assembly attaching bolts
(Fig. 78).
(3) Remove tensioner assembly.
CAUTION: The timing belt tensioner is serviced as
an assembly. To prevent premature timing belt fail-
ure, DO NOT separate the tensioner pulley from
mounting bracket.
INSTALLATION
(1) Install timing belt tensioner assembly. Tighten
attaching bolts to 31 N´m (275 in. lbs.).
(2) Install timing belt. Refer to procedure in this
section.
CAMSHAFT OIL SEAL
REMOVAL
CAUTION: Do Not Rotate the camshaft or crank-
shaft when timing belt is removed damage to the
engine may occur.
(1) Remove crankshaft damper, front timing belt
cover, timing belt and tensioner assembly. Refer to
procedures in this section.
(2) Hold camshaft sprocket with Special Tools
C-4687 and modified C-4687-1 as shown in (Fig. 79),
while removing attaching bolt.
(3) Remove sprocket from camshaft.
(4) Remove rear timing belt cover.
Fig. 76 Crankshaft and Camshaft Timing
1 ± CAMSHAFT TIMING MARKS
2 ± CRANKSHAFT AT TDC
Fig. 77 Crankshaft DamperÐInstallation
1 ± M12 Ð 1.753150 MM BOLT, WASHER AND THRUST
BEARING FROM SPECIAL TOOL 6792
9 - 46 2.0L SOHC ENGINEPL
REMOVAL AND INSTALLATION (Continued)

NOTE: Do not reuse connecting rod bolts.
(18) Remove all main bearing cap and bedplate
bolts from the engine block (Fig. 96).
(19) Using a mallet tap the bedplate loose from the
engine block dowel pins.
CAUTION: Do not pry up on one side of the bed-
plate. Damage may occur to cylinder block and bed-
plate alignment.
(20) Bedplate should be removed evenly from the
cylinder block dowel pins.
(21) Lift out crankshaft from cylinder block (Fig.
94). Be sure not to damage the main bearings or
journals when removing the crankshaft.
CRANKSHAFT MAIN BEARINGS LOCATION
The crankshaft is supported in five main bearings.
All upper bearing shells in the crankcase have oil
grooves. All lower bearing shells installed in the (bed-
plate) main bearing cap are plain. Crankshaft endplay is controlled by a flanged bearing on the number
three main bearing journal (Fig. 97).
NOTE: The upper and lower main Bearing shells
are Not interchangeable. The lower shells have a
revised tab to prevent improper installation.
CRANKSHAFT MAIN JOURNALS INSPECTION
The crankshaft journals should be checked for
excessive wear, taper and scoring. Limits of taper or
out-of-round on any crankshaft journals should be
held to 0.025 mm (0.001 in.). Journal grinding should
not exceed 0.305 mm (0.012 in.) under the standard
journal diameter. DO NOT grind thrust faces of
Number 3 main bearing. DO NOT nick crank pin or
bearing fillets. After grinding, remove rough edges
from crankshaft oil holes and clean out all passages.
CAUTION: With the nodular cast iron crankshafts
used it is important that the final paper or cloth pol-
ish after any journal regrind be in the same direc-
tion as normal rotation in the engine.
Upper and lower Number 3 bearing halves are
flanged to carry the crankshaft thrust loads and are
NOT interchangeable with any other bearing halves
in the engine (Fig. 97). All bearing cap bolts removed
during service procedures are to be cleaned and oiled
before installation. Bearing shells are available in
standard and the following undersized: 0.016 mm
(0.0006 in.), 0.032 mm (0.0012 in.), 0.250 mm (0.010
in.). Never install an undersize bearing that will
reduce clearance below specifications.
Fig. 95 Torque Strut Bracket
1 ± BOLTS
2 ± TORQUE STRUT BRACKET
Fig. 96 Bedplate Bolts
Fig. 97 Main Bearing Identification
1 ± OIL GROOVES
2 ± UPPER BEARINGS
3 ± LOWER BEARINGS
4 ± OIL HOLES
PL2.0L SOHC ENGINE 9 - 53
REMOVAL AND INSTALLATION (Continued)

INSTALLATION
(1) Install the main bearing shells with the lubri-
cation groove in the cylinder block. Install O-ring
into recess in the block (Fig. 98).
(2) Make certain oil holes in block line up with oil
hole in bearings and bearing tabs seat in the block
tab slots.
CAUTION: Do Not get oil on the bedplate mating
surface. It will affect the sealer ability to seal the
bedplate to cylinder block.
(3) Oil the bearings and journals and install
crankshaft in cylinder block.
CAUTION: Use only the specified anaerobic sealer
on the bedplate or damage may occur to the
engine.
(4) Apply 1.5±2.0 mm (0.059±0.078 in.) bead of
MopartBed Plate Sealant to cylinder block as shown
in (Fig. 99).
(5) Install lower main bearings into main bearing
cap/bedplate. Make certain the bearing tabs are
seated into the bedplate slots. Install the main bear-
ing/bedplate into engine block.
(6) Before installing the bolts oil threads with
clean engine oil, wipe off any excess oil.
(7) Install main bearing bedplate to engine block
bolts 11, 17 and 20 finger tight. Tighten these bolts
down together until the bedplate contacts the cylin-
der block (Fig. 100).(8) Install main bearing bedplate to engine block
bolts (1±10) and torque each bolt to 81 N´m (60 ft.
lbs.) in sequence shown in (Fig. 100).
(9) Install main bearing bedplate to engine block
bolts (11±20), with baffle studs in positions 12, 13
and 16 and torque each bolt to 34 N´m (25 ft. lbs.) in
sequence shown in (Fig. 100).
(10) After the main bearing bedplate is installed,
check the crankshaft turning torque. The turning
torque should not exceed 5.6 N´m (50 in. lbs.).
(11) If crankshaft end play is to be checked, refer
to service procedures in this section.
(12) Install connecting rod bearings and caps.
Install new connecting rod bolts and tighten to 27
N´m (20 ft. lbs.) plus 1/4 turn.
(13) Install oil pump and crankshaft front oil seal.
(14) Install oil pick-up tube and oil pan. Refer to
procedure in the section.
(15) Install oil filter adapter and filter.
(16) Install lower torque strut/air conditioning
compressor mounting bracket to engine (Fig. 95).
Fig. 98 Installing Main Bearing Upper Shell
1 ± LUBRICATION GROOVES
2 ± O-RING
3 ± OIL HOLES
Fig. 99 Main Bearing Caps/Bedplate Sealing
Fig. 100 Main Bearing Caps/Bedplate Torque
Sequence
9 - 54 2.0L SOHC ENGINEPL
REMOVAL AND INSTALLATION (Continued)