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Topic: Suburban A/T leaking around the pan

in Forum: Non-Vette Automotive Discussion

Re: Suburban A/T leaking around the pan

Posted: 7/13/15 11:27pm Message 11 of 13
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Vancouver, WA - USA
Joined: 8/25/2005
Posts: 869
Vette(s): 1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Well I drained and dropped the pan tonight.  Inspected the gasket I put in a few weeks ago - it's a flexible, black material, kind of like hard rubber, very thin.  (not much thicker than the rubber of a bicycle tire tube).  Inspected the pan and found a low spot on the bolting rim that is (what a surprise) right where I was seeing most of the seeping.  I lightly ball peened the rim in that area and got it to look a little better with a straight edge.  lightly peened some of the bolt holes that were slightly mushroomed, too.  Then installed pan with my new, reusable, much thicker, ATP gasket.  Also, the holes have grommets - on the old gasket the bolts fit in the holes very tight, I'm wondering if that could be some of my problem, too.  (gasket twisted a little as I was tightening bolts??)  Anyway, tomorrow I will fill it and test drive and hope for the best!  Thanks for the help.  



 

1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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Re: Suburban A/T leaking around the pan

Posted: 7/14/15 4:17am Message 12 of 13
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Ah yes....the cheesy inner tube gasket...LOL  Never seen one of those things actually work...too thin, and mooshy to seal anything. Add in a slightly disfigured pan surface, and you have a recipe for leakage.
The new gasket should fix it up nicely. Thumbs Up 


Joel Adams
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Re: Suburban A/T leaking around the pan

Posted: 7/15/15 10:47pm Message 13 of 13
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Vancouver, WA - USA
Joined: 8/25/2005
Posts: 869
Vette(s): 1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Go things put back together last night and drove it to work today - Knock on wood ....no seeping yet.  Time will tell.  Thanks again for the help.  



 

1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

in Forum: Non-Vette Automotive Discussion


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