engine VOLKSWAGEN CORRADO 1993 Workshop Manual

* SUSPENSION UNIFORM INSPECTION GUIDELINES *
Article Text (p. 2)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:43PM
The Motorist Assurance Program continues to work
cooperatively and proactively with government agencies and consumer
groups toward solutions that both benefit the customer and are
mutually acceptable to both regulators and industry. We maintain the
belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part
of the problem. Meetings with state and other government officials
concerned with auto repair and/or consumer protection are conducted.
Feedback from these representatives are brought back to members, and
the program adjusted as needed.
To assure auto repair customers recourse if they were not
satisfied with a repair transaction, the Motorist Assurance Program
offers arbitration through MAP/BBB-CARE in cooperation with the
Council of Better Business Bureaus and individual participating
Bureaus. MAP "piloted" in Indianapolis and Pittsburgh during spring,
1996 - and publicized "roll-outs" in New Jersey, Detroit (MI), Chicago
(IL) and Richmond (VA) were conducted. To put some "teeth" in the
program, and accreditation requirement for shops was initiated. The
requirements are stringent and a self-policing method has been
incorporated which includes the "mystery shopping" of outlets. In
addition, a committee of service providers had been working diligently
developing standards for newspaper, television and Internet
advertising.
We welcome you to join us as we continue our outreach ...
with your support, both the automotive repair industry and your
customers will reap the benefits. Please visit MAP at our Internet
site: www.hunter.com/map.htm or contact us at:
808 17th Street, NW Suite 200
Washington, D.C. 20006
Ph. (202) 466-7050 Fax (202) 223-9569
OVERVIEW OF SERVICE REQUIREMENTS & SUGGESTIONS
It is MAP policy that all exhaust, brake, ABS, steering and
suspension, wheel alignment, tires and wheels, driveline, engine
performance and maintenance and heating, ventilation and air
conditioning services be offered and performed under the guidelines
and procedures specified in these sections.
Before any service is performed on a vehicle, an inspection
of the appropriate system must be performed. The results of this
inspection must be explained to the customer and documented on an
inspection form. The condition of the vehicle and its components will
indicate what services/part replacements may be required or suggested.
In addition, suggestions may be made to satisfy the needs expressed by
the customer.
This section lists the various parts and conditions that
indicate required or suggested service or part replacement. Although
this list is extensive, it is not inclusive. In addition to this list,
a technician may make a suggestion. This suggestion must be based on
substantial and informed experience or the vehicle manufacturer's
recommended service interval.

* SYMPTOM CHECK LIST *
Article Text (p. 8)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:45PM
NOTE: Have the service adviser fill out these forms with the
customer whenever possible.Fig. 6: Engine Driveability & Automatic Transmission

2.8L IN-LINE V6 (VR6)
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
ARTICLE BEGINNING
1992-93 ENGINE
Volkswagen 2.8L 6-Cylinder
1992-93 Corrado SLC, 1993 Passat
* PLEASE READ THIS FIRST *
NOTE: For engine repair procedures not covered in this article,
see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article
in the GENERAL INFORMATION section.
ENGINE IDENTIFICATION
Engine identification number is stamped on a machined pad, on
front of the cylinder block. See Fig. 1. The engine code is also
listed on a sticker attached to the timing belt cover and the vehicle
identification located in luggage compartment.
ENGINE IDENTIFICATION CODES TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Engine Code
2.8L VR6 (1) .......................................... AAA
(1) - An "in-line" V6. See Fig. 7 for cylinder
arrangement.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄFig. 1: Locating Engine Identification Number
Courtesy of Volkswagen United States, Inc.

2.8L IN-LINE V6 (VR6)
Article Text (p. 2)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
ADJUSTMENTS
HYDRAULIC LIFTER TEST
To determine weak or noisy lifter, position camshaft lobe
high point upward. Using a piece of wood, push lifter down. See
Fig. 2. If lifter moves down more than .004" (.10 mm), replace lifter.
If lifter moves less than .004" (.10 mm), lifter is okay. Repeat
procedure for remaining lifters.
CAUTION: If lifter is replaced, allow 30 minutes for lifter to bleed
down before starting engine.Fig. 2: Measuring Lifter Clearance
Courtesy of Volkswagen United States, Inc.
REMOVAL & INSTALLATION
FUEL PRESSURE RELEASE
Remove fuel pump relay. Fuel pump relay is the lower right
relay located in fuse/relay panel. Crank engine for 5 seconds.
Reinstall fuel pump relay.
ENGINE
NOTE: Engine is removed with transaxle attached.
Removal
1) Obtain radio code. Turn ignition off and wait 20 seconds.
Disconnect negative battery cable. Remove air cleaner assembly.
Install 8.0 mm bolt in belt tensioner hole and remove service belt.
See Fig. 3.
2) On manual transmission models, disconnect clutch slave
cylinder. On all models, remove power steering pump and attach to
body. Remove radiator, front lock support and front bumper. Drain

2.8L IN-LINE V6 (VR6)
Article Text (p. 3)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
cooling system. Disconnect cooling fan and thermoswitch.Fig. 3: Releasing Accessory Drive Belt Tensioner
Courtesy of Volkswagen United States, Inc.
3) Label and disconnect electrical wiring and vacuum hoses.
Disconnect throttle, cruise and kickdown linkage (if equipped). Remove
air duct from intake manifold. Attach Engine Sling (2024A). See
Fig. 4.
4) Disconnect drive axle from transaxle. See FWD AXLE SHAFTS
article in DRIVE AXLES. Disconnect exhaust pipe from exhaust manifold.
Raise engine and transaxle out of vehicle.
Installation
Reverse removal procedure to complete installation. Use NEW
self-locking nuts and coolant. Ensure engine mounts are installed to
original location. Align all engine supports with mount bushings
before tightening mount bolts. Tighten bolts to specification. See
TORQUE SPECIFICATIONS table at end of article.Fig. 4: Attaching Engine Sling
Courtesy of Volkswagen United States, Inc.

2.8L IN-LINE V6 (VR6)
Article Text (p. 4)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
INTAKE MANIFOLD
Removal and installation procedure is not available from
manufacturer. See TORQUE SPECIFICATIONS table at end of article.
EXHAUST MANIFOLD
Removal and installation procedure is not available from
manufacturer. See TORQUE SPECIFICATIONS table at end of article.
CYLINDER HEAD
Removal
1) Removal and installation procedure is not available from
manufacturer. Cylinder head may be removed with engine in vehicle. See
Fig. 5. Match mark all components for installation reference.
2) Remove cylinder head bolts in reverse sequence of
installation. See Fig. 7. Replace cylinder head bolts after loosening
or removing.Fig. 5: Identifying 2.8L VR6 Cylinder Head
Courtesy of Volkswagen United States, Inc.

2.8L IN-LINE V6 (VR6)
Article Text (p. 9)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PMFig. 12: Aligning Intermediate Shaft At TDC
Courtesy of Volkswagen United States, Inc.
CAMSHAFT
Removal
Remove valve cover. Place crankshaft at TDC. Remove timing
chain from camshaft sprocket. Remove camshaft bearing caps. Remove
camshaft.
Inspection
Check camshaft bearing oil clearance. See CAMSHAFT table
under ENGINE SPECIFICATIONS at end of article. If oil clearance
exceeds specification, install new camshaft and recheck clearance. If
clearance still exceeds specification, replace cylinder head.
Installation
1) Lubricate all contact surfaces. When installing bearing
caps, ensure identification mark on bearing cap is readable from
exhaust manifold side and arrow points toward vibration damper. See
Fig. 13.
2) Tighten bearing caps No. 1, 3 and 5 alternately in a
diagonal sequence to 15 ft. lbs. (20 N.m). Repeat procedure for
bearing caps No. 2, 4 and 6.
3) To complete installation, reverse removal procedure.
Ensure timing marks are properly aligned. Before starting engine,

2.8L IN-LINE V6 (VR6)
Article Text (p. 10)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
allow 30 minutes for cam followers to bleed down.Fig. 13: Installing Camshafts Into Cylinder Head
Courtesy of Volkswagen United States, Inc.
WATER PUMP
NOTE: Coolant/water mixture should be used at all times.
Removal
1) Obtain radio security code. Turn ignition off and wait for
20 seconds. Disconnect negative battery cable. Drain cooling system.
Disconnect front exhaust pipe from catalytic converter.
2) Install 8.0 mm bolt in belt tensioner hole and remove
drive belt. See Fig. 3. Remove ignition cable guide. Disconnect front
and rear motor mounts. Attach Engine Sling (2024A) to engine. See
Fig. 4.
3) Lift engine enough to access water pump. Secure pulley
using Spanner Wrench (VAG 1590). Remove water pump bolts. Push engine
toward left side and remove water pump.
Installation
When installing motor mounts, ensure that recess on engine
bracket fits into mounting tab of bonded rubber bushing. Hand tighten
motor mount bolts and light rock engine to ensure motor mounts are
fully seated. To complete installation, reverse removal procedure.
OIL PAN
Information not available from manufacturer.
OVERHAUL
CYLINDER HEAD

2.8L IN-LINE V6 (VR6)
Article Text (p. 11)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Cylinder Head
Clean all gasket mating surfaces. Check cylinder head for
warpage. Ensure warpage does not exceed .004" (0.1 mm).
Valve Stem Oil Seals
With valve springs removed, remove oil seals using Valve Seal
Remover (3047A). To install new oil seal, slide plastic sleeve over
valve stem. Lubricate new oil seal. Using Valve Seal Installer (3129),
push oil seal on valve guide.
Valve Guides
1) Check valve-to-guide clearance specification. See
CYLINDER HEAD table under ENGINE SPECIFICATIONS at end of article. If
valve guide have previously been replaced, replace cylinder head.
2) To replace valve guide, press guide out from camshaft
side. Lubricate guide and press in cold cylinder head (from camshaft
side) until shoulder makes contact. DO NOT exceed one ton pressure.
Ream guides to proper valve-to-guide clearance. See CYLINDER HEAD
table under ENGINE SPECIFICATIONS at end of article.
Valve Seats
1) Check valve seats before any other cylinder head service.
Insert the valve and hold firmly against the valve seat. Measure valve
stem tip-to-cylinder head distance. See Fig. 14.Fig. 14: Measuring Valve Installed Height
Courtesy of Volkswagen United States, Inc.
2) This measurement determines installed valve height.
Subtract measured distance from minimum specification. See
MINIMUM VALVE INSTALLED HEIGHT table.
MINIMUM VALVE INSTALLED HEIGHT (2.8L) TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

2.8L IN-LINE V6 (VR6)
Article Text (p. 12)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Application In. (mm)
Intake Valve ................................. 1.33 (33.9)
Exhaust Valve ................................ 1.34 (34.1)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 3) The difference is maximum refacing allowable for valve and
seat. If valve installed height is too low or too high, lifters will
not work correctly. Replace cylinder head assembly.
Valves
Measure valve length, stem diameter and valve margin. If not
within specification, replace valves. Lap valves by hand or replace as
necessary. See VALVES SPECIFICATIONS table under ENGINE SPECIFICATIONS
at end of article.
CYLINDER BLOCK ASSEMBLY
Piston & Rod Assembly
1) Make sure piston, rod and rod caps are marked with
matching cylinder number prior to removal. Ensure arrow on top of
piston points toward pulleys. Ensure marks on rod and cap are
positioned correctly. See Fig. 15. Rod cap bolts and nuts must be
replaced after removing or loosening.Fig. 15: Assembling Piston & Rod
Courtesy of Volkswagen United States, Inc.