Volkswagen Corrado (1993 year). Manual - part 140

 

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Volkswagen Corrado (1993 year). Manual - part 140

 

 

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION 

         TIMING BELTS

         Cogged tooth belts are commonly used on overhead cam
engines. Inspect belt teeth for rounded corners or cracking. Replace
belt if cracked, damaged, missing teeth or oil soaked.
         Used timing belt must be installed in original direction of
rotation. Inspect all sprocket teeth for wear. Replace all worn
sprockets. Sprockets are marked for timing purposes. Engine is
positioned so that crankshaft sprocket mark will be upward. Camshaft
sprocket is aligned with reference mark on cylinder head and timing
belt is installed. See Fig. 25.

Fig. 25:  Timing Belt Sprocket Alignment - Typical
This Graphic For General Information Only

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION 

         If guide rails are used with spring loaded tensioners,
ensure at least half of original rail thickness remains. Spring
loaded tensioner should be inspected for damage.
         Ensure all timing marks are aligned. Adjust belt tension
using manufacturer's recommendations. Belt tension may require
checking using tension gauge. See Fig. 26.

Fig. 26:  Timing Belt Tension Adjustment - Typical
This Graphic For General Information Only

         TIMING GEARS

         * PLEASE READ THIS FIRST *

NOTE:    Always refer to appropriate engine overhaul article in the
         ENGINES section for complete overhaul procedures and
         specifications for the vehicle being repaired.

         TIMING GEAR BACKLASH & RUNOUT

         On engines where camshaft gear operates directly on
crankshaft gear, gear backlash and runout must be checked. To check
backlash, install dial indicator with tip resting on tooth of camshaft
gear. Rotate camshaft gear as far as possible. Adjust indicator to

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION 

         REAR MAIN OIL SEAL

         * PLEASE READ THIS FIRST *

NOTE:    Always refer to appropriate engine overhaul article in the
         ENGINES section for complete overhaul procedures and
         specifications for the vehicle being repaired.

         INSTALLATION

         One-Piece Type Seal
         For one-piece type oil seal installation, coat block contact
surface of seal with sealer if seal is not factory coated. Ensure seal
surface is free of burrs. Lubricate seal lip with engine oil and press
seal into place using proper oil seal installer. See Fig. 27.

Fig. 27:  Installing Typical One-Piece Oil Seal
This Graphic For General Information Only

         Rope Type Seal
         For rope type rear main oil seal installation, press seal
lightly into its seat. Using seal installer, fully seat seal in
bearing cap or cylinder block.
         Trim seal ends even with block parting surface. Some
applications require sealer to be applied on main bearing cap prior
to installation. See Fig. 28.

ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION 

         Split-Rubber Type Seal
         Follow manufacturers procedures when installing split-rubber
type rear main oil seals. Installation procedures vary with engine
type. See appropriate ENGINE article in this section. See Fig. 29.

Fig. 29:  Typical Split-Rubber Seal Installation
This Graphic For General Information Only

         OIL PUMP

         * PLEASE READ THIS FIRST *

NOTE:    Always refer to appropriate engine overhaul article in the
         ENGINES section for complete overhaul procedures and
         specifications for the vehicle being repaired.

         ROTOR-TYPE

         Oil pump rotors must be marked for location prior to removal.
See Fig. 30. Remove outer rotor and measure thickness and diameter.
Measure inner rotor thickness. Inspect shaft for scoring or wear.
Inspect rotors for pitting or damage. Inspect cover for grooving or
wear. Replace components if worn or damaged.

 

 

 

 

 

 

 

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