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Hello experts,
A friend of mine is experiencing the problem as stated in the subject with his 97 Mercedes E320. A week ago, the Reservoir was overflowing this creamy/liquidy peanut-butter looking coolant, which I believe it is an indication that either Trans. Fluid or Engine Oil got mixed up with coolant, hence the color change and the overflow. This car does have the 2 Trans. Cooler lines that circulate through the Radiator. I removed as many component in the cooling system as possible , water pump, hoses, etc, to clean, I will do the flush after the diagnosis. Compression Test was performed beforehand and tested fine. I removed the Radiator and blew compressed air through the in and out cooler lines to check for leaks, none found, the air only escapes from the other opening, not from the upper or lower radiator hose terminals. I believe the radiator is the only place where the Trans. Fluid could leak into the coolant, correct me if I am wrong. Also, the car does not overheat, no cloudy smoke from the tail pipe, that’s why I did not bother running a leak down test. There is no sign of blown Head-gasket/cracked head as far as I can tell.What other places to check where oil/Trans fluid could mix? Also, is it possible that there a small leak in the radiator that the compressed air did not escape from? I was thinking about pouring liquid instead of forcing air but does it have to be pressurized? I do not want to crack the radiator open to physically inspect the internal line unless required. Any info on this issue would be greatly appreciated!!!
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My mistake I thought the 3.2Ls were V engines must be Mazda I’m thinking of haha then yeah you got a head gasket issue
That’s ok, thanks for the quick replies.
We’ll pull the head then. I will report back findings/repairs.[quote=”RogueTeddy” post=85912]My mistake I thought the 3.2Ls were V engines must be Mazda I’m thinking of haha then yeah you got a head gasket issue[/quote]
I made a mistake too, I said V6 Inline lol
about $30.00 and can help confirm if you have a leaking head gasket
Yeah, reading through this thread, the first test I would have reached for would have been to check for combustion gasses in the coolant. CO2 never comes from the trans.
According to AllData, there are 2 Bulletins and I need clarification with this one. It says:
[i][color=#448844]Cause:
*Oil duct screw connection at front in crankcase V installed without sealing ring or with damaged sealing ring so that engine oil in crankcase V is below intake module.*Remedy:
*Remove intake module and replace sealing ring.*[/color][/i]The other bulletin is leaky headgasket, which is very likely the case – at least according to thousands of complaints from E class owners, but I wanted to check the sealing ring first which I am unsure of its exact location. Perhaps I will be able to see it once I remove the intake manifold? I thought I might check this first and go from there.
How about this. Put dye in either the engine oil or transmission fluid. Leave the old radiator in BTW. Then run the vehicle for a day or so and check the coolant. If the dye shows up in the coolant then you know it was the fluid that you added the dye to. You can then search for the leak. If you don’t see the dye, try putting the dye in the other fluid and rerun the test.
Keep us posted.
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