1990 VOLKSWAGEN CORRADO Repair Manual

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. 8)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PM
1) Align flywheel/flex plate "O" mark with pointer. This is
TDC. Remove distributor cap and check position of ignition rotor.
Rotate intermediate shaft and position rotor at No. one cylinder mark
on housing. See Fig. 7.Fig. 7: Aligning Ignition Rotor
Courtesy of Volkswagen United States, Inc.
2) With intermediate shaft/ignition rotor positioned, rotate
crankshaft and align mark on crankshaft pulley with mark on
intermediate shaft sprocket. Position camshaft sprocket mark even with
valve cover surface. See Fig. 8. Install timing belt.Fig. 8: 8-Valve Timing Mark Alignment
Courtesy of Volkswagen United States, Inc.
3) Rotate tensioner clockwise to tighten belt and install
lock nut. Proper tension is achieved when belt can be twisted 90
degrees. See Fig. 9. Rotate crankshaft 2 revolutions and check timing
mark alignment. To complete installation, reverse removal procedure.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 9)
1990 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Thursday, March 23, 2000 09:40PMFig. 9: Proper Timing Belt Tension
Courtesy of Volkswagen United States, Inc.
INSTALLATION (16-VALVE)
1) Install timing belt around crankshaft and intermediate
shaft sprockets. Install lower timing belt cover. Install vibration
damper, noting offset holes. If valve cover is installed, mark on
front of camshaft sprocket must align with mark on valve cover. If
valve cover is removed, place camshaft sprocket mark even with valve
cover surface. See Fig. 10.Fig. 10: 16-Valve Timing Mark Alignment
Courtesy of Volkswagen United States, Inc.

1.8L 4-CYL 8-VALVE & 1.8L 4-CYL 16-VALVE
Article Text (p. 10)
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) Align crankshaft sprocket mark with mark on lower timing
belt cover. See Fig. 10. Install timing belt around camshaft sprocket.
Rotate tensioner clockwise until Timing Belt Tension Scale (VW 210)
reads 13-14. Rotate crankshaft 2 revolutions and check timing mark
alignment. To complete installation, reverse removal procedure.
CAMSHAFT OIL SEAL R & I
REMOVAL
1) Remove upper timing belt cover. Place crankshaft at TDC
with No. one cylinder on compression stroke. Remove timing belt from
camshaft sprocket. Remove camshaft sprocket. Remove Woodruff key.
Install camshaft sprocket bolt and washer until washer is tight
against camshaft.
2) Rotate inner part of Oil Seal Extractor (2085) outward 2
turns and tighten set screw. See Fig. 11. Lubricate threaded area of
extractor and push in as far as possible. Loosen set screw and turn
inner part of extractor until oil seal is removed.
INSTALLATION
Coat new seal seat and lips lightly with engine oil. Using
Installer (10-203), install seal until flush. On 16-valve engines, use
Special Hex Head Bolt (10-203/1). To complete installation, reverse
removal procedure.Fig. 11: Removing Camshaft Oil Seal
Courtesy of Volkswagen United States, Inc.
CAMSHAFT R & I (8-VALVE)
CAUTION: Mark components to ensure installation to original location
and position. Components are not interchangeable.
REMOVAL (8-VALVE)
1) Remove upper timing belt cover. See Fig. 6. Remove valve
cover. Place crankshaft at TDC with No. one cylinder on compression

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