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Old 08-01-2023, 05:17 AM   #1
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Mayonnaise on Coolant - Oil Cooler ?

Hello Folks! Long time no see

Problem has already been discussed here quite some times, strong presence of mayonnaise inside the coolant . Ill start with removing the oil cooler and checking for internal mixing, since there is no external leaking (seems that rubber seals are "fine").

The question is - can this be done without draining the coolant ? Eventually ill drain it - and change oil too - but can i just remove and test the cooler prior to the drain ?

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Old 08-01-2023, 05:34 AM   #2
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Quote:
...can this be done without draining the coolant ?
Yes. It will be a little messy, but you have intermix already. You can minimize the mess by lowering the level of coolant in the expansion tank. I've used a turkey baster for that (do not use it for basting turkey afterward).
In most cases of intermix the problem will turn out to be a cracked head, especially in 2000 models. I actually did have one that was bad O-rings on the oil cooler though.

Hoping for the best.
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Old 08-01-2023, 06:35 AM   #3
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Originally Posted by 78F350 View Post
Yes. It will be a little messy, but you have intermix already. You can minimize the mess by lowering the level of coolant in the expansion tank. I've used a turkey baster for that (do not use it for basting turkey afterward).
In most cases of intermix the problem will turn out to be a cracked head, especially in 2000 models. I actually did have one that was bad O-rings on the oil cooler though.

Hoping for the best.

Thanks for the fast reply!

Okay - ill try to lower the coolant level somehow before trying. In any case, ill take the chances and proceed with it as it.

My model is a 2004 2.7L one. Lets hope for the best

In case there is a cracked head, any cost estimation available ?

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