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Posted by Derek in Durham [Email] (more from Derek in Durham) on Wed, 29 Sep 2004 05:41:44 Share Post by Email
In Reply to: Re: Leaking coolant like crazy, all connectors tight ->, michael p, Tue, 28 Sep 2004 12:46:31
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Can you smell coolant in the car? If not, heater core is less likely.

In addition to stuff people have already mentioned, here are a few more sources of "hidden" coolant leaks:

- engine oil cooler! You don't necessarily have to have coolant in your oil or vice versa for this to be a problem. This is a known issue on the V6. Coolant will appear in the V between the heads. I have a small leak of this kind right now and you don't see it until the next morning, and then you have to use a flashlight. It's actually easier to see in the dark because the coolant reflects. See linked post below. Depending on the nature of the problem, you might need a new oil cooler ($$$) or just to have the cover resealed (my case).

- less likely, but same area: the coolant "bridge" where the coolant temp sensor goes into the top of the V between the heads; there are a few hoses around there. Check carefully.

Other crap that you'll figure out in a hurry if you get some cardboard down: radiator, other hoses, coolant tank.

Like Asia, I have replaced all of the hoses over time and can confirm that it's a PITA. But it is not really that hard. Prepare to get dirty and to spill a lot of coolant everywhere; it was nasty.

Good luck!

Derek / 1994 900 S V6 149,000mi

posted by 152.5.25...

Leaking oil cooler cover = you would have coolant leaking out of the valley between the cylinders

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