1985 Chevy Silverado rear main seal installation

Tiny
CURTCHRIS
  • MEMBER
  • 1985 CHEVROLET SILVERADO
Engine Mechanical problem
1985 Chevy Silverado V8 Two Wheel Drive Automatic

do you have any photos you can send me on installation of rear main seal
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Thursday, March 11th, 2010 AT 9:54 PM

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Tiny
BLUELIGHTNIN6
  • EXPERT
Anything in particular you needing to see? Replacement steps are below if that helps any.

1. Remove the engine oil pan.
2. Remove the oil pump and the rear main bearing cap.
3. Using a small pry bar, pry the oil seal from the rear main bearing cap.
4. Using a small hammer and a brass pin punch, drive the top half of the oil seal from the rear main bearing. Drive it out far enough, so it may be removed with a pair of pliers.
5. Using a non-abrasive cleaner, clean the rear main bearing cap and the crankshaft.
6. Fabricate an oil seal installation tool from 0.004 inch shim stock, shape the end to 1 /2 inch long by 11 /64 inch wide.
7. Coat the new oil seal with engine oil; DO NOT coat the ends of the seal.
8. Position the fabricated tool between the crankshaft and the seal seat in the cylinder case.
9. Position the new half seal between the crankshaft and the top of the tool, so that the seal bead contacts the tip of the tool.

Make sure that the seal lip is positioned toward the front of the engine.

10. Using the fabricated tool as a shoe horn, to protect the seal's bead from the sharp edge of the seal seat surface in the cylinder case, roll the seal around the crankshaft. When the seal's ends are flush with the engine block, remove the installation.
11. Using the same manner of installation, install the lower half onto the lower half of the rear main bearing cap.
12. Apply sealant to the cap-to-case mating surfaces and install the lower rear main bearing half to the engine; keep the sealant off of the seal's mating line.
13. Install the rear main bearing cap bolts and torque to 10-12 ft. Lbs. Using a lead hammer, tap the crankshaft forward and rearward, to line up the thrust surfaces. Torque the main bearing bolts to 70-85 ft. Lbs. (V6 and V8 ) or 60-75 ft. Lbs. (In-line 6 cylinder) and reverse the removal procedures. Refill the crankcase.
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Thursday, March 11th, 2010 AT 10:16 PM
Tiny
CURTCHRIS
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I was told it was a 2 peace seal when I got it apart I found no seal at all unless I was told wrong and its a 1 peace is that posable
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Thursday, March 11th, 2010 AT 10:26 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Yeah pretty certain the '85 used a 1 piece seal, should look something like the pic below


http://www.2carpros.com/forum/automotive_pictures/261618_5_8.jpg

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Thursday, March 11th, 2010 AT 11:13 PM

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