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Old 05-06-2010, 12:11 PM   #1
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Unhappy Foamy coffee colored coolant in tank

I take Im looking at a head gasket issue? It started off with just a slow loss of coolant..then proceeded to have oil residue in coolant tank..now I think I have coolant in oil and vice versa

Temp gauge has never over heated during this, but I have added coolant as I go.. and it drives fine..

Sound right?

What r my options? can I drive it to the dealer / shop about 60 mi, or should I tow it in?
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Old 05-06-2010, 12:26 PM   #2
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Sounds like a head gasket to me. I've had PLENTY of those on my supercharged Jeep. Cometic gaskets were the cure, but probably overkill for an NA boxster.
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Old 05-06-2010, 12:32 PM   #3
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Sorry - whats NA ??
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Old 05-06-2010, 12:39 PM   #4
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does the car have an oil cooler *
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Old 05-06-2010, 12:57 PM   #5
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NA=Normally Aspirated (no forced induction)

All M96 engines have an oil/coolant heat exchanger mounted to the top of the engine. Yours may have failed leading to intermix. Perhaps someone more technical than I can chime in on this component.
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Old 05-06-2010, 01:51 PM   #6
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+1 on the heat exchanger

Do a search on it and hopefully that's what it is

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Old 05-06-2010, 02:47 PM   #7
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The two most common issues there are the heat exchanger (a device that runs both coolant and the oil through it in separate chambers to get the heat out of the oil) or the RMS that's out.

My money would be on the heat exchanger.
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Old 05-06-2010, 03:39 PM   #8
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Man I hope its that oil cooler thing.. Im just not usually that lucky! Thx
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Old 05-06-2010, 08:43 PM   #9
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I've also seen one example posted, where a freeze plug in the camshaft area popped out and let coolant into the oil.
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Old 05-06-2010, 09:05 PM   #10
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Quote:
Originally Posted by Tranlm
The two most common issues there are the heat exchanger (a device that runs both coolant and the oil through it in separate chambers to get the heat out of the oil) or the RMS that's out.

My money would be on the heat exchanger.
RMS causes oil leak at the bellhousing, NOT into the coolant.

I would absolutely pull and test/ swap out the heat exchanger to rule out a simple fix. If not, it's likely a head gasket or porosity issue in a case half or head (possibly a head crack).

If anything but a heat exchanger problem, the motor will have to come out and at least the heads pulled. Have the heads pressure checked, preferably, with the heads at operating temp. Check for surface trueness of both the case and the head and grind accordingly.

As far the gasket of choice, Cometic gaskets are MLS (multi layer steel), as are the factory gaskets (and about 90% of all new cars), so there's no need to go aftermarket.
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Old 05-07-2010, 01:01 PM   #11
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Thanks folks..now where would I get this part..would it be listed under cooling system or engine systems?? I cant find anything called a heat exchanger..
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Old 05-07-2010, 02:26 PM   #12
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Quote:
Originally Posted by cdnboxster
Thanks folks..now where would I get this part..would it be listed under cooling system or engine systems?? I cant find anything called a heat exchanger..
The heat exhanger is the oil cooler. Here...it is part #20 in this link:
http://www.pelicanparts.com/PartsLookup/HTML/986_USA_KATALOG/104-00-Frame3.htm
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Old 05-08-2010, 09:49 AM   #13
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Originally Posted by Boxtaboy
The heat exhanger is the oil cooler. Here...it is part #20 in this link:
http://www.pelicanparts.com/PartsLookup/HTML/986_USA_KATALOG/104-00-Frame3.htm
Correct. I would also order the larger "S" cooler, if your car is a base.
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Old 05-08-2010, 12:29 PM   #14
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Better price

same part is $159 here:

JPamporschejaguarparts.com/

just leave the "m100" number off when you do the parts search.....

Not affiliated, just bought many things here....great prices!
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Old 06-07-2010, 10:37 AM   #15
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changed out the cooler...

Seems like there is no coolant getting in the oil(changed it twice)...flushed the cooling system but there is still oil??? is it residue or am I looking at another spot for the leack i.e. head gasket? thoughts and opinoins?
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Old 06-07-2010, 11:24 AM   #16
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Quote:
Originally Posted by cdnboxster
Seems like there is no coolant getting in the oil(changed it twice)...flushed the cooling system but there is still oil??? is it residue or am I looking at another spot for the leack i.e. head gasket? thoughts and opinoins?
It is very unusal to have a head gasket problem. I also believe it is the oil/heat exchanger. The person who needs to chime on your problem is Jake Rabby. Or you can look him up and email him your problem.
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