Intercooler oil leak - Forums
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post #1 of 4 (permalink) Old 02-06-2011, 20:01 Thread Starter
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Join Date: Dec 2010
Car: Rover 75 2.0 CDT
Posts: 11
Intercooler oil leak


Following a relatively long journey ~100 miles a couple of months ago, I noticed a little patch of oil on my driveway. I took my car to the local garage and they said that the oil came from the intercooler. They cleaned the residue off and said that it's such a small amount of oil that it's not worth replacing the intercooler until it gets much worse. There were no more oil leaks until today, when I went on another 100 mile trip (50-60 mph). I usually use my car for local driving to town etc without any problems.

What do you think is causing oil to leak only after long journeys?

Some forums have mentioned the crank case ventilation (CCV) system, and others have mentioned turbo seals and much scarier sounding stuff. The leak is coming from the bottom near side corner of the intercooler. What do you think?

BTW, 75s look great on sunny days.


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post #2 of 4 (permalink) Old 02-06-2011, 20:08
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Location: stourbridge, west midlands
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Start with the easy stuff, PCV and o'rings, also check the rotor on the turbo, but they are a rare failure if regular servicing has been adhered to

TS Autos - I do everything apart from paint and bodywork, I excel in trim, mechanical and electrical faults on all models, but know ZT/75's every nut and bolt quite literally. Please PM me if you need a part or work doing to your car! location as requested Midlands Area DY8 1XQ
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post #3 of 4 (permalink) Old 02-06-2011, 20:10
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I'd suggest your renew the intercooler duct O-rings (eBay?). The originals swell and allow oil mist to cause wetting then dripping from the nearside of the matrix. Easy fix.


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post #4 of 4 (permalink) Old 02-06-2011, 20:17 Thread Starter
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Car: Rover 75 2.0 CDT
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Thanks for those suggestions. Much appreciated.
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