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[Joiner]

Righto peeps,

This is what Sundays were made for, being upto your arse in oil and swarfega

Starting from the beginning, a few months ago I had oily emulsion in my coolant expansion tank. After ruling out the head gasket I began shopping around for a new oil cooler. Got a result and got a used unit for only forty quid, tested an with a 6 month warranty. Fitted it and all was well untill a few weeks ago. The oil returned but with a vengance.

I have just removed everything to get to the oil cooler, even the therm and housing to change while I am about it. I decided to bite the bullet and remove the cooler as well to give it a clean and visual. Anyway.......... when I undid the banjo bolts on the coolant bridge they were not very tight, not very tight at all. Also, when I refitted it *prepares for telling off* I re used the Doughty washers as I had forgotten to pick up some replacements.

The long and short of it is that the banjo bolts were not properly secure and the old washers had failed in spectacular fashion.

This being the case, if the doughty washers had failed, could/would this be the culprit for oily coolant again or would it still be the oil cooler?

I ask because I dont want remove the oil cooler if I dont have to cos its a pig of a job to remove and worse still to put back. FYI the banjo bolts when removed were covered in brown oily sludge much like the crap in my expansion tank.

Cheers chaps

[dbug]

Fraid its oil cooler mate.  No chance of oil getting in via leaking coolant bridge - just coolant getting out (leak) 

[amba]

Yes,must agree.

If you didn,t replace the dowty washers  on the coolant bridge the worst you would get is a coolant leak as only coolant flows through the bridge.

As you have been advised the only way you will get oil into the coolant is from the oil cooler, as oil is sealed within the 2 feed pipes then through the banjo bolts into the cooler and back around to form the circle.

Sorry mate but it does look like the oil cooler that has failed