timing chain cover - Engine Troubleshooting


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peggyfran1
User

Jan 23, 2010, 8:54 PM

Post #1 of 3 (1399 views)

timing chain cover	Sign In

1985 gmc 1/2 ton pickup.350c.u. im replacing the timing chain. its been a long time since i change one. my question is do i have to loosen the oil pan bolts. the manuel says yes, but on a big block. it dosent say anything about a small block. thanks, Frank

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 24, 2010, 1:07 AM

Post #2 of 3 (1392 views)

Re: timing chain cover	Sign In

Hmmm? Been a while for me too. I think the Chevy block has a cover more like a valve cover idea but don't make me swear to it. This is a typical (fancy chrome one found out there) cover.....

Others, Fords, other GM engines by others like Olds, Pontiac etc did have bolts to the cover and install could require their removal and if too difficult to align with indexing pins loosening of oil pan helped. I recall being able with some persuasion to get the others back on with a fight without messing up the oil pan gasket. This pic if like yours suggests oil pan isn't involved,

T

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 24, 2010, 5:43 AM

Post #3 of 3 (1388 views)

Re: timing chain cover	Sign In

V6-229, 262, V8-267, 305, 350, 400 & 454

Remove vibration damper and water pump, then the oil pan, if necessary.
Remove cover retaining screws and cover.
Clean gasket surface of block and timing case cover.
Remove any excess oil pan gasket material that may be protruding at the oil pan to engine block junction.
Apply a thin bead of RTV #1052366 sealer or equivalent to the joint formed at oil pan and block.
Coat new gasket with sealer and position it on cover, then install cover to oil pan seal on cover and coat bottom of seal with engine oil.
Position cover on engine and loosely install the upper bolts.
Tighten screws alternately and evenly while pressing downward on cover so that dowels are aligned with holes in cover. Do not force cover over dowels as cover can be distorted.
Install remaining cover screws, vibration damper and water pump.

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(This post was edited by Hammer Time on Jan 24, 2010, 5:48 AM)

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