Coolant leak at top of engine (PICS) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-06-2007, 09:12 PM   #1
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Default Coolant leak at top of engine (PICS)

A decent amount of coolant is coming out of the location shown right above the marked line above the arrow. What is the best way to go about this? Will I have to remove the SC along with the fuel rail? What is probably causing the leak?



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Old 11-06-2007, 09:30 PM   #2
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Can't make out much on the bolts. Most likely it'* coolant wicking up a bolt or an LIM gasket leak. Can you try and get better pics with more light.
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Old 11-06-2007, 09:51 PM   #3
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Not sure what you mean? Its right above that black line, not the bolts nearby. You can enlarge the above pics by clicking on them. I can get better pics for sure, but I don't see why you would need them. The coolant seeps out from that tan piece that is bolted onto the engine and the engine itself. Right where they meet it seems.



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Old 11-06-2007, 10:09 PM   #4
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Just took these as requested.

This is just a puddle to the left of the leak. This is NOT where the leak is. I did not see any coolant coming out of this spot when I pressure tested the radiator.


These are pics of the leak (above the black line)










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Old 11-06-2007, 10:20 PM   #5
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i have the same problem in those same areas, dont know quite sure whats causing it, heres my post i made a few weeks ago (check out my pics)

http://www.bonnevilleclub.com/forum/...c.php?p=971361


I partly solved the problem by loosening some of the bolts, applying some RTV and then tightening them back up, that has made most of the leak go away, but its still there.
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Old 11-06-2007, 10:56 PM   #6
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Repair this issue and do it soon.... The gaskets are starting to leak... There is no ifs ands or butts.... The gaskets need to be replaced...

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Old 11-06-2007, 11:14 PM   #7
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Quote:
Originally Posted by jr's3800
Repair this issue and do it soon.... The gaskets are starting to leak... There is no ifs ands or butts.... The gaskets need to be replaced...
Which gaskets? Just the LIM? Also what if the leak is left alone for awhile?
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Old 11-06-2007, 11:29 PM   #8
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The LIM Gaskets... If its leaking coolant on the outside as you point out, there is a possibility that its leaking internally... I'd rather see you spend the $$ on some gaskets rather than have you spend a low mileage motor...

so yes repair that soon, and don't let it go very long...

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Old 11-07-2007, 08:22 AM   #9
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I really appreciate your help! So I assume i'll have to remove the SC so what all will I need?

1. SC Gasket
2. LIM Gasket
3. Fuel injector O-rings?

It would be nice to have everything when I go to start this. I'm not sure what all I would need however. Also while i'm down there, are there any good maintenance procedures to perform?
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Old 11-07-2007, 08:33 AM   #10
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Yes, that does appear to be the LIM gaskets.

On gaskets to get. When you get the SC gasket, the Felpro'* appear to come with the coolant o-rings, Dealership ones will not come with the o-rings. You will need them.

Add a TB gasket as well. This will be a good time to clean it up.
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