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06-11-2002, 07:45 PM
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14.1 @ 96MPH
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
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*grumble*
Just slid under my truck for a quick check (I was going to change the oil, then realized I didn't have enough time before work) and realized the entire bottom of the pan is wet...with oil, of course...
The oil filter looks clean, so it's not coming out around there, I don't think...the front of the engine is clean (and the front main seal is new) so I don't think it's that...it's always been a bit moist but now it's wet enough to spray some back as far as the tranny tailshaft...and the oil consumption is getting worse. What do you guys think? Pan gasket? How hard is it to replace on one of these trucks? (original smallblock)
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Project1970 - LS1 Swap Complete! 
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06-11-2002, 08:17 PM
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Registered User
Join Date: Aug 2001
Location: escondido, ca 92026
Posts: 1,222
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most likey a pan gasket or possibly a rear main seal... you'll hafta wipe everything squeaky clean under there and then do the drive/check routine til you see the source..... best to start clean early in the day so you have time to drive/check for as long as it takes to figure it out..... have fun..
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'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project |
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06-11-2002, 09:50 PM
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Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
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Check your valve cover gaskets, they could be leaking around the back of the motor and running down like a buddy's of mine is doing we thought it was the rear seal until we pulled the tranny, and discovered it was the valve covers leaking.
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'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA  
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06-12-2002, 04:57 AM
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14.1 @ 96MPH
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
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Well, the tranny is coming out soon, within a month hopefully...yay for 700R4s.
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Project1970 - LS1 Swap Complete!
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06-12-2002, 10:27 AM
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Weapons Of Construction
Join Date: Apr 2000
Location: Colorado, USA
Posts: 1,095
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Check your oil sending unit or pressure switch (unless you have the mechanical guage). I thought my old 74 Monte Carlo lost a rear main until I traced it to the switch for the idiot light.
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1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO |
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06-12-2002, 07:55 PM
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14.1 @ 96MPH
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
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It would appear, after doing the change, that the majority of the dripping oil is coming out of the weep hole on the bellhousing, but it's definitely crankcase oil. Any ideas? Rear main? *gulp*
The tranny's coming off in a month or so...
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