4.3 Liter engine question

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Dec 24, 2006 | 01:49 PM

whitecrystal1

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From: Dumfries, Virginia Member: #6887

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4.3 Liter engine question

Does the 4.3l have a intake problem like the 3.8l? or would it just be a bad head gasket if my friend just found antifreeze in his oil? I'm not a mechanic but I did try to look at it with him last night. It doesn't look anything like the intake on the 3.8l to me. btw this is in his S10.

Dec 24, 2006 | 02:00 PM

Peterg22000

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no they do not have the same problem a the 3800 with the UIM. this would be just a bad gasket someware, the 4.3'* rarely get broblems like these, i know my old one never did, and still hasnt had any problems and its pushing 1/2milliom miles

get it fixed up, she wil be good to go for a long time to come if you treat it well

Dec 24, 2006 | 02:01 PM

banned3800

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What year is the 4.3? Therew were changes... Also which engine is it? TBI or CPI?

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Dec 24, 2006 | 02:10 PM

Peterg22000

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Quote:

Originally Posted by jr's3800

What year is the 4.3? Therew were changes... Also which engine is it? TBI or CPI?

****, i never even thought about that, i think they did change the upper to a similer style to the 3800, but i still dont beleave they had any issues

Dec 24, 2006 | 02:25 PM

whitecrystal1

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From: Dumfries, Virginia Member: #6887

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Dec 24, 2006 | 02:35 PM

Peterg22000

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Quote:

Originally Posted by whitecrystal1

1995

im still thinking its just a bad gasket
anyone else???

Dec 24, 2006 | 02:37 PM

banned3800

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Quote:

Originally Posted by Peterg22000

Quote:

Originally Posted by jr's3800

What year is the 4.3? Therew were changes... Also which engine is it? TBI or CPI?

***^, i never even thought about that, i think they did change the upper to a similer style to the 3800, but i still dont beleave they had any issues

Yeah when they went to the Plastic lower intake, they started having issues with the Lower intake gaskets and in some cases the lower intake its self.... Dorman actually makes replacements for both the 4.3 V6 and the Chevy Line of 5.0-5.7 V8'* iirc

Also wondering has a compression test been done? If it was ran hot enough its possible to cookk the head gasket or crack a head...

But if it has the alluminum intake with plastic gaskets anything is possible... I'd have to research it, but I'm not sure what gaskets it used..

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Dec 24, 2006 | 03:09 PM

willwren

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I've owned 3 of these engines. Do a compression check first. If it'* good, and nothing obvious shows up, start tearing off the top end until you find the problem gasket.