AAZ OIL IN COOLANT WATER

Post by **Bwana John** » 06 Apr 2007, 20:57

Has anybody got a definate diagnosis for oil in coolant water in diesel engines? When I got this aaz from the breakers yard there was evidence of oil in the coolant hoses(it was in a vw jetta but rad missing) I pressure tested the oil cooler and no fault found. Put engine in and no evidence of the same, until after the Coney Farm antics/ journey .Have flushed out and seems ok at the moment.Could it be somthing else/ Any ideas otherwise I shall change oil cooler.

Post by **andysimpson** » 06 Apr 2007, 21:20

Oil coolers are more common than head gaskets. What year is the AAZ? Late ones have a better head gasket.

Post by **Bwana John** » 08 Apr 2007, 11:27

It`s a 1993 as far as I can tell. Ive seen this before on a Passat td and syncro pete ( my son) had it on a golf petrol ( i think) engine. He replaced the cooler with a new vag one,40 quid, and that sorted it. it seems odd that it`s intermittant and pressure testing the water jacket with air to 80 psi does`nt show anything.

Post by **mister smith** » 08 Apr 2007, 11:36

If it's intermittent, it's not likely to be the head gasket. Especially if you've been doing some mileage with the problem, it would have failed badly by now..

Post by **andysimpson** » 08 Apr 2007, 14:48

The head gasket can have slight mixing of oil and water, and do it for a long time withou gettig worse, the later metal gasket sorted this. Whats the engine no after AAZ.

Post by **mister smith** » 09 Apr 2007, 10:37

I stand corrected, I was thinking of a leak between the chamber & waterways, not oil & water, D'oh!