'93 L27 leaky TB. Will this cause coolant burn off? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-18-2007, 11:33 AM   #1
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Default '93 L27 leaky TB. Will this cause coolant burn off?

Hey all, I need to replace a TB gasket to fix my coolant leak on '93 L27. But I'm burning off coolant for a few mins after start up. Is this also a symptom of the TB gasket? Vehicle runs fine after getting warmed up and no other issues, other than coolant loss. I've already pulled the LIM and replaced those gaskets and seals...no other areas (and I've searched all over) where coolant is externally leaking. The upper plenum looks fine upon removal and inspection. I just thought it odd that a leaky TB could cause coolant burnoff, but you guys are the 3.8 pros. Please advise. I'd like to think that when I replace the TB gasket that all will be well again!
Thanks.
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Old 03-18-2007, 12:48 PM   #2
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You didn't replace that TB gasket when you did the lower intake gaskets and seals?

Yes, coolant flows through your TB. It can leak. It'* up to you to see if that'* the place it'* coming from.

I'll forewarn you that the 93 L27 TB gasket (as well as all 92/93 L27/L67) can be hard to find. You may have to go to the dealer. Should run you about $12.
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Old 03-19-2007, 09:30 AM   #3
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Thanks Will. Yes, like a dumbkopf, I did not realize that the TB gasket was a replaceable item. Got a new one from Advance Auto (they had to order it). Will replace old one today and post the results.
Thanks again.
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Old 03-19-2007, 09:32 AM   #4
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Yes,

A leaky gasket at the TB can possibly allow coolant into the intake and end up burning in the cylinders.
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Old 03-19-2007, 11:42 AM   #5
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i believe these two threads are related:

http://www.bonnevilleclub.com/forum/...72916&start=20
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