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'94 s10 w/4.3 - water in oil question

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Old 02-16-2008, 08:49 PM   #1
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'94 s10 w/4.3 - water in oil question

Hello!

found out there's water in the oil. At first, I thought it was head gasket, but not so sure now. A few months ago I changed the water pump, and now I'm wondering if there is a potential I didn't seal the bolts properly and perhaps the water is getting in the oil that way.

Maybe I'm nuts, but I remember something about the water pump bolts on certain chevy motors...

so, whats the verdict? Nuts or bolts? lol...
Old 02-17-2008, 01:56 AM   #2
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Re: '94 s10 w/4.3 - water in oil question

prob a head gasket... how much water are we talkin?
Old 02-17-2008, 07:17 AM   #3
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Re: '94 s10 w/4.3 - water in oil question

Quote: Originally Posted by lt1s10onair
prob a head gasket... how much water are we talkin?
I'd wager on intake manifold gaskets, first. Head gaskets are not very common to go bad on these trucks. Intake manifold gaskets are, and that is one of the signs - coolant in the oil.

Search for that, or for "LIM" and you'll find oodles of info, pics, etc.
Old 02-17-2008, 08:07 AM   #4
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Re: '94 s10 w/4.3 - water in oil question

Not too much water. I had a look at the write-up that blanz did (Nice!), and will probably replace that gasket set next weekend.

The motor still run great, with no apparent lack of power, so I'm taking that as a sign the head gaskets are ok.

Thanks!
Old 02-17-2008, 08:11 AM   #5
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Re: '94 s10 w/4.3 - water in oil question

If you've got water in the oil, though, you don't want to be driving it. That's a sure way to wreck bearings and more. The gasket kit is cheap, maybe $40ish, so I'd do it before driving it again if possible, or you may run into additional problems. If the oil looks milky at all - it's not good.
Old 02-24-2008, 03:39 PM   #6
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Re: '94 s10 w/4.3 - water in oil question

so, I changed the gaskets yesterday. Changed the oil and antifreeze, and cleaned the manifold and plenum. Got it all back together ok, and its running but it's now throwing codes 22 and 34. Thought it was the MAP sensor, so plunked down $40 for a new one - of course that isn't it.

Before I go any further, I thought I'd ask for suggestions on what I should look for next.

In addition to the gaskets, I also replaced the cap & rotor.

Any help would be greatly appreciated.

Thanks,
Doug
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