Volkswagen New Beetle. Manual - part 75

indicator to zero. Rotate camshaft gear 360 degrees and note reading. If backlash or runout exceeds 
specification, replace camshaft and/or crankshaft gear.  

REAR MAIN OIL SEAL 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 

Rope Type Seal 

For rope type rear main oil seal installation, press seal lightly into seat area. Using seal installer, fully seat seal 
in bearing cap or cylinder block.  

Trim seal ends even with cylinder block parting surface. Some applications require sealer to be applied on main 
bearing cap before installing. See Fig. 28 .  

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Engine Overhaul Procedures

  

Fig. 28: Installing Typical Rope Seal 

Split-Rubber Type Seal 

Follow manufacturer's procedures when installing split-rubber type rear main oil seals. Installation procedures 
vary with manufacturer and engine type. See Fig. 29 .  

Fig. 29: Installing Typical Split-Rubber Seal

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Engine Overhaul Procedures

  

OIL PUMP 

ROTOR TYPE 

Mark oil pump rotor locations before removing. 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 worn or damaged components.  

Measure outer rotor-to-body clearance. Replace pump assembly if clearance exceeds specification. Measure 
clearance between rotors. See Fig. 31 . Replace shaft and both rotors if clearance exceeds specification.  

Install rotors in pump body. Position straightedge across pump body. Using feeler gauge, measure clearance 
between rotors and straightedge. Pump cover wear is measured using a straightedge and feeler gauge. Replace 
pump if clearance exceeds specification.  

Fig. 30: Typical Rotor Type Oil Pump 

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Engine Overhaul Procedures

  

Fig. 31: Measuring Rotor Clearance 

GEAR TYPE 

Mark oil pump gear location before removing. See Fig. 32 . Remove gears from pump body. Inspect gears for 
pitting or damage. Inspect cover for grooving or wear. Measure gear diameter and length. Measure gear housing 
cavity depth and diameter. See Fig. 33 . Replace worn or damaged components.  

Pump cover wear is measured using a straightedge and feeler gauge. Replace pump or components if warpage 
or wear exceeds specification, or mating surface of pump cover is scratched or grooved.  

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Engine Overhaul Procedures