1993 VOLKSWAGEN CORRADO oil change

A/C COMPRESSOR OIL CHECKING
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
1993 GENERAL SERVICING
Compressor Refrigerant Oil Checking
* PLEASE READ THIS FIRST *
NOTE: For compressor applications, see COMPRESSOR APPLICATIONS
TABLE below. DO NOT exceed A/C system refrigerant oil
capacity, when servicing system. See REFRIGERANT OIL &
REFRIGERANT SPECIFICATIONS TABLE.
COMPRESSOR APPLICATION
NOTE: Due to late changes, always refer to underhood A/C
specification label in engine compartment or A/C compressor
label while servicing A/C system. If A/C Specification label
and specifications in this article differ, always use label
specifications.
COMPRESSOR APPLICATION TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Compressor
Acura .......................................... Nippondenso 10-Cyl.
Audi
90 ................................................... Zexel 6-Cyl.
100 .................................................. Zexel 6-Cyl.
BMW .................................................... Nippondenso
Or Seiko-Seiki
Chrysler Motors/Eagle
Colt & Summit ................................ Sanden FX105V Scroll
Colt Vista & Summit Wagon .............. Nippondenso 10PA15 10-Cyl.
Stealth ..................................... Sanden FX105VS Scroll
Ram-50 ......................................... Sanden FX80 Scroll
Ford Motor Co.
Capri ......................................... Nippondenso 10-Cyl.
Festiva ........................................ Nippondenso 6-Cyl.
General Motors & Geo
LeMans ......................................... Harrison V5 5-Cyl.
Metro & Tracker ............................... Nippondenso 10-Cyl.
Prizm .................................. Nippondenso 10PA15 10-Cyl.
Storm ............................... Diesel Kiki KC-50 Rotary Vane
Honda
Accord ........................................ Nippondenso 10-Cyl.
Or Hadsys RC-17S 7-Cyl.
Civic ............................................... Sanden Scroll
Civic Del Sol ....................................... Sanden Scroll
Prelude ............................................. Sanden Scroll
Hyundai
Elantra ..................................... Sanden TRF-090 Scroll

A/C SYSTEM GENERAL DIAGNOSTIC PROCEDURES
Article Text (p. 6)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:48PM
* Restricted air inlet.
* Mode doors binding.
* Blower motor inoperative.
* Temperature above system capacity.
HEATING GENERAL TROUBLE SHOOTING
CONDITION & POSSIBLE CAUSE
Insufficient, Erratic, or No Heat
* Low coolant level.
* Incorrect thermostat.
* Restricted coolant flow through heater core.
* Heater hoses plugged.
* Misadjusted control cable.
* Sticking heater control valve.
* Vacuum hose leaking.
* Vacuum hose blocked.
* Vacuum motors inoperative.
* Blocked air inlet.
* Inoperative heater blower motor.
* Oil residue on heater core fins.
* Dirt on heater core fins.
Too Much Heat
* Improperly adjusted cables.
* Sticking heater control valve.
* No vacuum to heater control valve.
* Temperature door stuck open.
Airflow Changes During Acceleration
* Vacuum system leak.
* Bad check valve or reservoir.
Air From Defroster At All Times
* Vacuum system leak.
* Improperly adjusted control cables.
* Inoperative vacuum motor.
Blower Does Not Operate Correctly
* Blown fuse.
* Blower motor windings open.
* Resistors burned out.
* Motor ground connection loose.
* Wiring harness connections loose.
* Blower motor switch inoperative.
* Blower relay inoperative.
* Fan binding or foreign object in housing.
* Fan blades broken or bent.
END OF ARTICLE

C - SPECIFICATIONS
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:58PM
ARTICLE BEGINNING
1993 ENGINE PERFORMANCE
Service & Adjustment Specifications
Corrado SLC
INTRODUCTION
Use this article to quickly find specifications related to
servicing and on-vehicle adjustments. This is a quick-reference
article to use when you are familiar with an adjustment procedure and
only need a specification.
CAPACITIES
BATTERY SPECIFICATIONSÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Amp Hr. Rating
Corrado SLC ...................................... 63
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄFLUID CAPACITIES
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄApplication Quantity
Auto. Trans. (Dexron-II)
Dry Fill ...................................... (1)
Refill (Oil Change) ........................... (1)
Cooling System (Includes Heater) .... 9.1 Qts. (8.6L)
Crankcase (Includes Filter) ......... 6.3 Qts. (6.0L)
Man. Transaxle (SAE 75-80/API
GL-4 Or SAE 75W-90, G50
Synthetic Gear Oil) ............... 2.1 Qts. (2.0L)
(1) - Information is not available from manufacturer.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ QUICK-SERVICE
SERVICE INTERVALS & SPECIFICATIONS
REPLACEMENT INTERVALS
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Miles
Air Filter ................................... 30,000
Coolant ...................................... 30,000
Fuel Filter (1) .............................. 15,000
Oil & Filter ................................... 7500

E - THEORY/OPERATION
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 09:09PM
Fuel Injectors
See FUEL CONTROL under FUEL SYSTEM in this article.
Fuel Pump
See FUEL DELIVERY under FUEL SYSTEM in this article.
Idle Air Control/Stabilizer Valve
See IDLE SPEED under FUEL SYSTEM in this article.
Ignition Coil & Output Stage
See DISTRIBUTORLESS IGNITION SYSTEM (DIS) under IGNITION
SYSTEM in this article.
Malfunction Indicator (CHECK ENGINE) Light
See MALFUNCTION INDICATOR (CHECK ENGINE) LIGHT under SELF-
DIAGNOSTIC SYSTEM in this article.
FUEL SYSTEM
FUEL DELIVERY
Fuel Pump
A 2-stage fuel pump, located in fuel tank, is used (one motor
drives two separate pumps). The stage one vane-type pump draws fuel,
through a screen, from bottom of fuel tank and into an accumulator.
The vane-type pump acts as a transfer pump. The stage two gear-type
pump draws fuel from bottom of accumulator and out fuel lines.
Fuel Pressure Regulator
The diaphragm-type fuel pressure regulator is attached to
fuel return side of fuel rail. Fuel pressure is regulated depending on
intake manifold pressure. As intake manifold pressure changes, the
pressure regulator will increase or decrease fuel system pressure.
FUEL CONTROL
Fuel Injectors
Fuel injectors are supplied with battery (system) voltage
through power supply relay and are controlled (grounded) by the ECM.
Injectors are opened sequentially in cylinder firing order. Fuel
quantity is determined by injector on time (duty cycle).
IDLE SPEED
Idle Air Control/Stabilizer Valve
The idle air control/stabilizer valve is actuated by the ECM
thorough the valve's ground control circuit. When a defect in circuit
is recognized, both output stages are shut-off and the valve rotates
to a fixed potion. This permits engine to idle at a warm engine idle
speed.
IGNITION SYSTEM

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION
Article Text (p. 15)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:09PMFig. 13: Typical Hydraulic Valve Lifter Assemblies - Typical
This Graphic For General Information Only
On sticking lifters, disassemble and clean lifter. DO NOT mix
lifter components or positions. Parts are select-fitted and are not
interchangeable. Inspect all components for wear. Note amount of wear
in lifter body-to-camshaft contact area. Surface must have smooth and
convex contact face. If wear is apparent, carefully inspect cam lobe.
Inspect push rod contact area and lifter body for scoring
or signs of wear. If body is scored, inspect lifter bore for damage
and lack of lubrication. On roller type lifters, inspect roller for
flaking, pitting, loss of needle bearings and roughness during
rotation.
Measure lifter body O.D. in several areas. Measure lifter
bore I.D. of cylinder block. Some models offer oversized lifters.
Replace lifter if damaged.
If lifter check valve is not operating, obstructions may be
preventing it from closing or valve spring may be broken. Clean or
replace components as necessary.
Check plunger operation. Plunger should drop to bottom of the
body by its own weight when assembled dry. If plunger is not free,
soak lifter in solvent to dissolve deposits.
Lifter leak-down test can be performed on lifter. Lifter
must be filled with special test oil. New lifters contain special test
oil. Using lifter leak-down tester, perform leak-down test following
manufacturer's instructions. If leak-down time is not within
specifications, replace lifter assembly.
Lifters should be soaked in clean engine oil several hours
prior to installation. Coat lifter base, roller (if equipped) and
lifter body with ample amount of Molykote or camshaft lubricant. See

H - TESTS W/O CODES
Article Text (p. 6)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:11PM
* Check full throttle switch.
* Check ignition timing.
ENGINE RUNS UNEVENLY OVER ENTIRE SPEED RANGE
* Check auxiliary air intake system.
* Check injector fuel pressure and volume.
* Check ignition timing, spark plugs, distributor, secondary
ignition wiring and coil.
INTERMITTENTS
INTERMITTENT PROBLEM DIAGNOSIS
Intermittent fault testing requires duplicating circuit or
component failure to identify the problem. These procedures may lead
to the computer setting a fault code (on some systems) which may help
in diagnosis.
If problem vehicle does not produce fault codes, monitor
voltage or resistance values using a DVOM while attempting to
reproduce conditions causing intermittent fault. A status change on
DVOM indicates a fault has been located.
Use a DVOM to pinpoint faults. When monitoring voltage,
ensure ignition switch is in ON position or engine is running. Ensure
ignition switch is in OFF position or negative battery cable is
disconnected when monitoring circuit resistance. Status changes on
DVOM during test procedures indicate area of fault.
TEST PROCEDURES
Intermittent Simulation
To reproduce the conditions creating an intermittent fault,
use the following methods:
* Lightly vibrate component.
* Heat component.
* Wiggle or bend wiring harness.
* Spray component with water.
* Remove/apply vacuum source.
Monitor circuit/component voltage or resistance while
simulating intermittent. If engine is running, monitor for self-
diagnostic codes. Use the test results to identify a faulty component
or circuit. For system or component testing refer to the appropriate
I - SYS/COMP TESTS article in this section. See the menu below:
* For Cabriolet, see: I - SYSTEM/COMPONENT TESTS
* For Corrado SLC, see: I - SYSTEM/COMPONENT TESTS
* For EuroVan, see: I - SYSTEM/COMPONENT TESTS
* For Fox, see: I - SYSTEM/COMPONENT TESTS
* For Golf, GTI, Jetta, see: I - SYSTEM/COMPONENT TESTS
* For Passat GL 2.0L 4-Cylinder, see:

I - SYSTEM/COMPONENT TESTS
Article Text (p. 6)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:11PM
IGNITION COIL
EMISSION SYSTEMS & SUB-SYSTEMS
NOTE: Other than EGR system, additional emission systems and
sub-system component testing information is not available
from manufacturer.
EXHAUST GAS RECIRCULATION (EGR)
Corrado SLC (2.8L)
1) Ensure engine coolant temperature is at least 122øF
(50
øC). Start engine and allow it to idle. Disconnect vacuum hose from
EGR valve. See Fig. 4. Connect hand-held vacuum pump to EGR valve and
apply vacuum.
2) Idle quality must noticeably deteriorate. If idle quality
does not change, check EGR valve and exhaust manifold for plugging.
Replace EGR valve if necessary. After repairs, erase DTC memory.Fig. 4: Testing EGR System (Corrado SLC)
Courtesy of Volkswagen United States, Inc.

INTERFERENCE VERIFICATION CHECK FOR OHC ENGINE
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 09:12PM
ARTICLE BEGINNING
Maintenance & Service Information
1974-96 Volkswagen - Timing Belt Information
Cabrio, Cabriolet, Corrado, Dasher, Eurovan (Canadian), Fox,
Golf, Golf (Canadian), GTI, GTI (Canadian), Jetta, Jetta GLI,
Passat, Passat (Canadian), Pickup, Quantum, Rabbit, Scirocco,
Scirocco (Canadian), Transporter (Canadian), Vanagon
TIMING BELT INTERFERENCE VERIFICATION INFORMATION
TIMING BELT INTERFERENCE CAUTION
NOTE: CAMSHAFT DRIVE BELTS OR TIMING BELTS - The condition of
camshaft drive belts should always be checked on vehicles
which have more than 50,000 miles. Although some
manufacturers do not recommend replacement at a specified
mileage, others require it at 60,000-100,000 miles. A
camshaft drive belt failure may cause extensive damage to
internal engine components on most engines, although some
designs do not allow piston-to-valve contact. These designs
are often called "Free Wheeling". Many manufacturers changed
their maintenance and warranty schedules in the mid-1980's to
reflect timing belt inspection and/or replacement at
50,000-60,000 miles. Most service interval schedules shown in
this section reflect these changes. Belts or components
should be inspected and replaced if any of the following
conditions exist:
* Crack Or Tears In Belt Surface
* Missing, Damaged, Cracked Or Rounded Teeth
* Oil Contamination
* Damaged Or Faulty Tensioners
* Incorrect Tension Adjustment
TIMING BELT INTERFERENCE CHECK MENU
TIMING BELT INTERFERENCE VERIF. TABLE - PASSENGER CARS (1)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Replacement Interval
Application Engine (Miles)
Cabrio
1995-96 .......... 2.0L 4-Cyl. ............ (3) 60,000
Cabriolet
1985-89 ....... 1.8L 4-Cyl. (DOHC) ........ (3) 60,000
1.8L 4-Cyl. (SOHC) ........ (3) 60,000
1990-93 .......... 1.8L 4-Cyl. ............ (3) 60,000
Corrado
1990-92 .......... 1.8L 4-Cyl. ............ (3) 60,000
Dasher