4.3L Oil Pan Replacement - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-05-2000, 11:04 AM
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4.3L Oil Pan Replacement

I found out the hard way that the previous owner (or his/her mechanic) on my 1993 Jimmy (4.3L "W", 4WD) stripped the nut for the oil pan drain plug. I can't tighten it enough to stop it from leaking. I've tried an oversize bolt, and that hasn't worked either. Mama doesn't want me parking in the driveway and leaving oil spots, and I don't like parking in the street (bad experience 10 years ago when someone rear-ended my '69 Camaro). I think the only way to permanently fix this is to replace the oil pan. I know it's a hell of a lot easier with the engine pulled, but since this is my daily driver, I can't have it out of service for more than a weekend. Has anyone tried to replace the oil pan on a similar truck with the engine in? The Chilton's manual makes it sound like you have to unbolt everything but the spare tire to do it. Any feedback would be appreciated.

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post #2 of (permalink) Old 12-05-2000, 02:53 PM
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Re: 4.3L Oil Pan Replacement

Have you considered a helicoil? It would seem to me it would be much easier to drill out the hole, tap it, and thread in a helicoil with the appropriate bolt.


post #3 of (permalink) Old 12-05-2000, 02:56 PM
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Re: 4.3L Oil Pan Replacement

If you can get the bolt out, just go get a replacement bolt either from a parts shop or the junk yard.

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post #4 of (permalink) Old 12-05-2000, 05:21 PM
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Re: 4.3L Oil Pan Replacement

You say you tried and oversized plug what about an double oversized or triple oversized? I had to put a single oversize on mine after 227K miles.

1991 S10 Blazer Tahoe 4x4. Edelbrook Headers, Holley 670cfm TBI, K/N filter charger, 30-9.5-15 tires, rebuild worked tranny
post #5 of (permalink) Old 12-05-2000, 05:27 PM
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Re: 4.3L Oil Pan Replacement

I have seen where someone has welded a nut onto the pan to give a new threaded drain hole. Can't say that I've done it myself though. Just an idea.
David G.

'91 S15 Jimmy 5.7L 4X4
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post #6 of (permalink) Old 12-06-2000, 08:32 PM
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Re: 4.3L Oil Pan Replacement

If you do any drilling or welding into the pan use a relly really really srong pen magnet to get to metal shavings out or you wont be driving for too long..

Just a thought...
Luvin 4 wheel'd life
1989 S-10 Shiny chrome
1999 Honda TRX400EX oh my
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