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Discussion Starter #1
Hey guys had my car for over a month now loving it and clocked around 3500ks already. Only worries is that the overflow tank has a strange smell and a slight oily-brown tinge to it. After driving it a little hard and popping the overflow tank cap the coolant can be seen bubbling. The car doesn't leak from anywhere or overheat, no smoke or residue in the exhaust. Doesn't seem to be any oil in water or vice versa and runs real well.

Also note i took it for a 40min drive on a real nice windy gravel road (old mountain road out near raglan if anyone is familiar) sliding through the corners etc and afterwards it had spat out about 500ml of coolant out the overflow. It was doing it excessively when i re-installed the restrictor pill after driving on boost but that was fixed when i replaced the rad cap with a new one. Will be taking it for a leakdown test this week hopefully.

Because of the smell has got me thinking my head gaskets might be leaking, dont have the cash to shell out for a 2.5k job or whatver it may be and dont have the tools or knowledge to do it at home. Thoughts?

cheers.

also car has done 148000Ks (not miles)
 

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Find out if it's the head gaskets, since that doesn't sound unreasonable. The symptoms do fit. Slight chance it's simply air in the system but if and only if you've recently opened up the cooling system for a repair. Otherwise your logic seems sound at least to me.
 

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No a leakdown test isn't designed to catch that. Based on your coolant color and the age of the car, I'd say there's an excellent chance it's the head gaskets. Yes, I'd start saving up and get them replaced ASAP before you damage your motor. If you're getting oil in your coolant, chances are you're also getting coolant in your oil. Have you drained and checked that recently?
 

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Discussion Starter #6
Yeah i just did an oil change and there was no signs of coolant e.g milky oil. What exactly is a leakdown helpful for catching then? cheers
 

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Compression losses whether bottom or top end. A cyl is pressurized and the losses measured in terms of rate or %.
 

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Discussion Starter #8
Ok well ill take it to my work experience garage and talk to them there. Ill get a cylinder leak test done and see what the guys there think. One of them said it could be a blocked radiator or partially blocked. How else can i check?
 

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Hmmm a leak down should work, thats what my mechanic did when I had a head gasket problem in my old Civic.
The result form the leakdown test: Bubbles coming out of the overflow tank.
Not what you expect form a leak down test, but it worked.
Oh and my civic did the bubbles thing when I revved it.
Just find it strange you're not overheating or "mysteriously" coolant losing
 
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