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Homepage -> NYMCC Message Board -> FWD Monte Discussion -> 3.8 coolant leak - what a surprise.
Post Info TOPIC: 3.8 coolant leak - what a surprise.
Stu Pidaso


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Date: Feb 6, 2010
3.8 coolant leak - what a surprise.
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After doing some research online this seems to be a REAL common problem.  So much of a problem it looks like a class action lawsuit was filled but see nothing newer than 2005 on this and there was a recall but was simply to put a leak sealer in the coolant.  This looks like it may be happening to all 3 of our 3.8s.  What is the best thing to do here?

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PitchBlackSS


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Date: Feb 6, 2010
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Is it a LIM or UMI gasket? Maybe one of the coolant elbows?

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Stu Pidaso


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Date: Feb 6, 2010
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On the 02 Monte I was shown at the intake manifold and was told by my local garage that there is an updated intake and gasket set that should be done for around 900 to 1000. Understandable that is why I am asking.

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twomanymontes


Moderator - Monte Hunter Lead Investigator

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Date: Feb 6, 2010
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Yeah, Coolant leaks are a big isue with GM's 3.4 and 3.8L intakes. and Yes, if you want it to stop, better replace the intake and use the upgraded gaskets.

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There is no such thing as Too Many Montes
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Donutboy97


Moderator-Monte Hunter Lead Investigator

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Date: Feb 7, 2010
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been there done that... this post summer. I think my pics are still around... or maybe it got killed when we swap boards, but if you have questions let us know.

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2001 Monte Carlo LS
1988 Monte Carlo SS As Shown In November 2011 Super Chevy Magazine with a magnafying glass...
Gib DTD


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Date: Feb 13, 2010
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Is it a visible leak, or is it a code that told you it was leaking?

The most common problem is actually that the coolant elbows break. Its a poor design and I am very surprised that GM hasn't put out metal replacements for it (iron or aluminum).

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2001 Monte Carlo SS, Black on Black. Planned upgrades: Top Swap, headers, northstar throttle body, Borla cat-back.
Stu Pidaso


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Date: Feb 14, 2010
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If I remember correctly he showed be at the base of the intake manifold. I am in Indiana right now and my 2004 has a leak also now :( .

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