C32 AMG, C55 AMG (W203) 2001 - 2007

water coolant pressurisng c32

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Old Mar 3, 2007 | 07:13 PM
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stretched4style's Avatar
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water coolant pressurisng c32

hi, just wondering if anybody has had a problem with water coolant pressurising after a high speed run. My c32 is a 2002 car and as had no problems at all. but is started pressurising and coolant is coming out of cap. i have replaced the cap which has helped, but its abit embrassing when the coolant runs down onto the the red hot brakes and you get a trail of steam behind you
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Old Mar 3, 2007 | 11:18 PM
  #2  
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From: Maine
Not an AMG :(
Originally Posted by stretched4style
hi, just wondering if anybody has had a problem with water coolant pressurising after a high speed run. My c32 is a 2002 car and as had no problems at all. but is started pressurising and coolant is coming out of cap. i have replaced the cap which has helped, but its abit embrassing when the coolant runs down onto the the red hot brakes and you get a trail of steam behind you
If the coolant is running onto the brake pads, is that on the passenger side? If so, maybe it's leaking / spewing from the intercooler pump since that is in close proximity?
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Old Mar 4, 2007 | 04:31 AM
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The water is only coming from the cap has I can see the coolant over the top of the expansion bottle
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Old Mar 4, 2007 | 08:13 AM
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From: Virginia
2002 C32
Originally Posted by stretched4style
The water is only coming from the cap has I can see the coolant over the top of the expansion bottle
When I recently flushed my coolant during the first few high speed runs afterwards I had coolant coming out of that pressure relief cap also. It has since stopped (just a consequence of a slight overfill).

The wheel well is fairly well-sealed off from other components, but I think it is feasible that some could drip from the reservoir down through the plastic shielding onto your calipers.

regards,
pete
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Old Mar 4, 2007 | 09:43 AM
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C32
Is the car overheating? What is your water temp when this happens?
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Old Mar 11, 2007 | 05:12 PM
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I have solved the problem. I smelt the coolant and it sinks of exhaust flues. Which means i have a head gasket gone. its leaking between the water pocket and the cylinder so then i go fast or on a long journey. it pumps flue into the coolant which is buliding the pressure up. thanks for you inputs.
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