technical specifications VOLKSWAGEN CORRADO 1990 Owners Manual

* SUSPENSION UNIFORM INSPECTION GUIDELINES *
Article Text (p. 66)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:39PM
Cracked ³ A ³ Require replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄDirectional/asymmetrical
³ B ³ Require remounting and/or
wheels mounted incorrectly
³ ³ repositioning.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄLoad capacity less than
³ B ³ Require replacement.
OEM specifications
³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄOffset mismatched on same
³ B ³ Require replacement.
axle
³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄRivets leaking
³ A ³ Require replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄRun-out beyond OEM specs
³ B ³ Require replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄStud holes elongated
³ A ³ Require replacement. See note (1)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄWelded or brazed repair
³ B,2 ³ Suggest replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄWelds leaking
³ A ³ Require replacement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄWheel hub centering (pilot)
³ B ³ Require replacement.
hole incorrect
³ ³
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄNOTE: (1) Inspect wheel attaching hardware for damage.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄEND OF ARTICLE

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 3)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
shift as necessary. Evenly tighten mount bolts in reverse order of
loosening. Fill fluids to proper level. Adjust clutch pedal (if
equipped). Tighten all bolts and nuts to specifications.
ENGINE R & I (FOX)
REMOVAL (FOX)
1) Disconnect negative battery cable. Open heater valve,
coolant expansion tank and drain radiator through lower radiator hose.
Mark and disconnect all heater hoses. Disconnect electric cooling fan
and thermo switch. Remove lower and side radiator mounting bolts.
Remove fan, shroud and radiator. Remove M/T clutch cable (if
equipped).
2) Mark and disconnect electrical wiring and vacuum hoses (as
necessary). Disconnect throttle, cruise and kickdown linkage (if
equipped). Remove fuel injectors and install protective caps and
plugs. Leave fuel lines attached and remove cold start valve. Remove
charcoal canister and set aside.
3) Remove 3 upper engine-to-transaxle bolts. Remove intake
air duct. Remove left and right engine mount nuts. Disconnect and
remove starter assembly. Remove 2 lower engine-to-transaxle bolts.
Remove transaxle inspection cover plate. Disconnect exhaust inlet pipe
support and separate inlet pipe from exhaust manifold.
4) Support transaxle. Attach engine sling to engine lifting
hooks. Raise engine/transaxle until engine clears engine mounts.
Ensure transaxle is supported. Remove remaining engine-to-transaxle
bolts. Lift and separate engine from vehicle without transaxle.
INSTALLATION
Lubricate transaxle main shaft splines and contact area
between clutch release bearing and clutch pressure plate with MoS2
grease. DO NOT lubricate guide sleeve for clutch release bearing. To
complete installation, reverse removal procedure. DO NOT reuse self-
locking nuts. Ensure engine mounts are installed to original location.
Tighten engine mounts and subframe bolts with engine running at idle.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 4)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PMFig. 2: Engine/Transaxle Alignment
Courtesy of Volkswagen United States, Inc.
INTAKE MANIFOLD R & I
Removal and installation procedure is not available from
manufacturer. See TORQUE SPECIFICATIONS table at end of this article.
EXHAUST MANIFOLD R & I
Removal and installation procedure is not available from
manufacturer. See TORQUE SPECIFICATIONS table at end of this article.
CYLINDER HEAD R & I
REMOVAL
No removal procedure available from manufacturer. Cylinder
head may be removed with engine in vehicle. Match mark all components
for installation reference. Timing belt must be removed. See TIMING
BELT R & I in this article. See Fig. 3 or 4. Remove cylinder head
bolts in reverse sequence of installation. See Fig. 5. Replace
cylinder head bolts after loosening or removing.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 6)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PMFig. 4: Exploded View of 8-Valve Cylinder Head
Courtesy of Volkswagen United States, Inc.
INSPECTION
Thoroughly clean all gasket mating surfaces. Check cylinder
head for warpage. The 8-valve cylinder head can be machined and 16-
valve cylinder head cannot be machined. Check camshaft(s). See
INSPECTION under CAMSHAFT R & I in this article. See ENGINE
SPECIFICATIONS at end of this article.
NOTE: DO NOT reuse antifreeze after replacing cylinder block,
cylinder head, head gasket, radiator and/or heater core.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 7)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
INSTALLATION
1) Ensure marking on cylinder head gasket is properly
positioned and install gasket on cylinder block. Do not use any type
of sealant. Carefully position cylinder head on cylinder. Install head
bolt Nos. 9 and 10 hand tight to ensure cylinder head position.
Install remaining head bolts hand tight.
2) Tighten cylinder head bolts in sequence to specifications.
See Fig. 5. See TORQUE SPECIFICATIONS table at end of this article. No
further information is available from manufacturer.Fig. 5: Cylinder Head Bolt Tightening Sequence
Courtesy of Volkswagen United States, Inc.Fig. 6: Exploded View of Timing Belt Components
Courtesy of Volkswagen United States, Inc.
TIMING BELT R & I
REMOVAL
Information not available from manufacturer. Use exploded
view for component locations. See Fig. 6. Match mark all components to
ensure reassembly to original position.
INSTALLATION (8-VALVE)

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 11)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
stroke. Remove timing belt from camshaft sprocket. Remove camshaft
sprocket. Remove Woodruff key. Check camshaft end play with cam
followers removed and bearing cap Nos. 1 and 5 installed. See CAMSHAFT
table at end of this article.
2) Remove bearing cap Nos. 1, 3 and 5 evenly a little at a
time. Repeat for remaining caps. Lift camshaft out of cylinder head.
See INSPECTION below.
INSPECTION
1) Check camshaft bearing oil clearance. See ENGINE
SPECIFICATIONS at end of this article. If oil clearance is greater
than specifications, install new camshaft and recheck clearance.
2) If clearance is still greater than specifications,
replace cylinder head. If replacing camshaft(s), ensure identification
number between lobes of cylinder No. one, are the same.
INSTALLATION (8-VALVE)
1) On engines with oil spray jets, position spray at right
angle to camshaft. Place camshaft in cylinder head with both high
points of lobes, for No. one cylinder facing upward. Install bearing
cap Nos. 1, 3 and 5.
2) Tighten evenly a little at a time. Repeat procedure for
remaining bearing caps. To complete installation, reverse removal
procedure. Ensure timing marks are properly aligned. Allow lifters to
bleed down for 30 minutes before starting engine.
CAMSHAFT R & I (16-VALVE)
REMOVAL (16-VALVE)
1) Remove upper timing belt cover. See Fig. 6. Remove valve
cover. Place crankshaft at TDC with No. one cylinder on compression
stroke. Remove timing belt from camshaft sprocket. Remove camshaft
sprocket. Remove Woodruff key. Check camshaft end play with cam
followers removed and bearing cap Nos. 1 and 4 (exhaust cam) or 5 and
8 (intake cam) installed. See CAMSHAFT SPECIFICATIONS table at the end
of this article.Fig. 12: 16-Valve Camshaft Bearing Caps
Courtesy of Volkswagen United States, Inc.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 12)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
2) Remove intake camshaft bearing cap Nos. 5, 7 and rear
evenly a little at a time. See Fig. 12. Loosen remaining intake
camshaft bearing caps evenly a little at a time. Remove exhaust
camshaft bearing cap Nos. 1, 3, front and rear evenly a little at a
time. Loosen remaining exhaust camshaft bearing caps evenly a little
at a time. Remove loosened caps. Lift camshafts out of cylinder head
together.
INSPECTION
1) Check camshaft bearing oil clearance. See ENGINE
SPECIFICATIONS at end of this article. If oil clearance is greater
than specifications, install new camshaft and recheck clearance.
2) If clearance is still greater than specifications, replace
cylinder head. If replacing camshaft(s), ensure identification number
between lobes of cylinder No. one, are the same.
INSTALLATION (16-VALVE)
1) On engines with oil spray jets, position spray at right
angle to camshaft. Place chain on both camshaft gears. Align marks on
gears and place both camshafts in cylinder head as shown. See Fig. 13.
2) Install intake camshaft bearing cap Nos. 6 and 8 and
tighten evenly a little at a time. See Fig. 12. Repeat procedure for
remaining intake camshaft bearing caps. Install exhaust bearing cap
Nos. 2 and 4 and tighten evenly a little at a time. Repeat procedure
for remaining exhaust bearing caps. To complete installation, reverse
removal procedure. Allow 30 minutes before starting engine for lifters
to bleed down.Fig. 13: 16-Valve Camshaft Gear Position
Courtesy of Volkswagen United States, Inc.
VALVE ARRANGEMENT
8-Valve Engines
E-I-E-I-I-E-I-E (Front-to-Rear).
16-Valve Engines

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 13)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
Right Side - Exhaust Valves.
Left Side - Intake Valves.
NOTE: "Right" and "Left" refer to right and left side of engine
NOT vehicle.
VALVE SEALS & SPRINGS R & I
Valve seals and springs may be removed with cylinder head
installed in vehicle. Remove camshaft as previously described. Mark
and remove lifters. Use compressed air to hold valves closed.
Installation Bar (2036), Spring Compressor (VW 541/1) and Valve Seal
Replacer/Sleeve (10-204/A) are necessary tools for replacing. DO NOT
install valve seal without using sleeve.
VALVE GUIDE R & I
If valve-to-guide clearance is not within specifications,
replace guide(s). See ENGINE SPECIFICATIONS tables at end of this
article. To replace valve guide, press guide out from combustion
chamber side. Press guide in cold cylinder head as far as guide will
go. DO NOT exceed one ton pressure. Ream guides by hand to achieve
proper valve-to-guide clearance.
VALVE SEATS
1) Check valve seats prior to any other cylinder head
service. If valve seats are less than specifications, cylinder head
must be replaced. Insert the valve and hold firmly against the valve
seat. Measure distance of valve stem tip to valve cover mounting
surface. See Fig. 14.Fig. 14: Measuring For Refacing Dimension
Courtesy of Volkswagen United States, Inc.
2) Subtract measured distance from minimum specifications.
See MINIMUM VALVE-TO-CYLINDER HEAD DIMENSION following this paragraph.
The total is maximum refacing allowable for both valve and seat. If
more is required, replace cylinder head assembly or machine valve stem

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 14)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
(Cabriolet only). If less than minimum dimension is used, valve
lifters will not function.
MINIMUM VALVE-TO-CYLINDER HEAD DIMENSIONÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication In. (mm)
8-Valve
Intake Valve .............. 1.330 (33.78)
Exhaust Valve ............. 1.342 (34.09)
16-Valve
Intake Valve .............. 1.354 (34.39)
Exhaust Valve ............. 1.366 (34.70)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ VALVES
1) With valves removed, measure dimension of valves. If not
within specifications, replace valves. DO NOT reface exhaust valves
with machine. Lap valves by hand or replace as necessary. See ENGINE
SPECIFICATIONS at end of this article.
CAUTION: On 16-valve engines, exhaust valves are sodium filled. Use
following procedure to dispose of valves properly.
2) To dispose of sodium filled valves, cut valve stem off
near head of valve with hacksaw. DO NOT allow water to contact valve
during cutting. Throw valve stem in bucket of water and move quickly
away. Once reaction with water has ceased, discard valve. Repeat
procedure as necessary.
VALVE CLEARANCE ADJUSTMENT
NOTE: Cylinder heads without shims between camshaft(s) and lifters
are not adjustable. See LIFTERS under VALVES in this article.
1) After any cylinder head repair, check and adjust valves
with engine cold. After 1000 miles (after repair) or at normal service
interval, adjust with engine warm. Shims are available in different
thicknesses. Etched side of shim must be installed away from camshaft.
2) Position camshaft lobes of cylinder to be check with high
points facing upward (valves closed). Measure clearance. See VALVE
ADJUSTMENT SPECIFICATIONS table in this article. If clearance cannot
be achieved with thinnest shim, shorter valves may be installed. If
clearance is greater than specifications, use appropriate shim to
acquire proper clearance.
3) To remove shim, rotate lifter (follower) so grooves face
inward towards each other (one cylinder at a time). Using Lifter
Compressor (2078) and Pliers (10-208), remove shim. To install,
reverse removal procedure.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 15)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
VALVE ADJUSTMENT SPECIFICATIONS TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication In. (mm)
Cold
Intake .............. .006-.010 (.15-.25)
Exhaust ............. .014-.018 (.35-.45)
Warm
Intake .............. .008-.012 (.20-.30)
Exhaust ............. .016-.020 (.40-.50)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ LIFTERS
1) If equipped with hydraulic lifters, no adjustment is
possible. If lifter noise is present, start engine and allow to warm
until cooling fan engages. Increase engine speed to 2500 RPM for 2
minutes. If lifter noise is intermittent or continues, replace
necessary lifters.
2) To determine weak or noisy lifter, position camshaft so
No. 1 cylinder lobes high point faces upward. Using a piece of wood,
push down on lifter. If lifter can be pushed down more than .004" (.10
mm), replace lifter. Repeat procedure for remaining lifters (as
necessary).
PISTON & ROD ASSEMBLY
Ensure piston, rod and rod caps are marked with matching
cylinder number prior to removal. Ensure engine front arrow is marked
on top of piston. See Fig. 15. Pistons and rods are to be replaced in
sets of 4. Rod cap bolts and nuts must be replaced after removing or
loosening.Fig. 15: Piston, Rod & Rings
Courtesy of Volkswagen United States, Inc.