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>Hi Volks- > >I am trying to fix an oil cooler leak and have a few questions. I went to >the FLAPS and got oil cooler seals (part number 311 117 151 A). After doing >the engine-in-car tin removal and taking off the oil cooler, I am now kinda >stumped. > >First of all, the existing seals are much flatter and thinner than the new >ones I picked up. I realize this could be from the natural compression of >having been squished between the oil cooler and the engine casing, but I >just wanted confirm if it's normal for the new ones to be about 2X the >thickness (height) of old ones and like 1/3 thinner in diameter. No sense >replacing the seals if they're the wrong ones! > >Secondly, the existing seals were not visibly torn or damaged. Because the >bottom half of the oil cooler is oily and dirty (I assume from dirt being >blown by and sticking to oily surfaces) I am now wondering if perhaps it's >not the seals but the cooler itself that has a leak (!?). Does anyone know >how to tell if it's your oil cooler leaking and not the seals? Or is the >oil cooler being all oily and dirty enough reason to assume it is the >culprit? Oil was slowly leaking out near the centermost 10mm nut (one of 3 >holding down the cooler) so I assumed it was the seals. Does a slow leak >(as opposed to a gush) also lead to a Bad Oil Cooler diagnosis? > >TIA for any advise. > >Cheers, > >Dave Y. > >PS. This is my first time doing my own oil cooler work (after 30 years of >ownership) so it's kindof exciting actually doing it after reading Muir for >years and hearing it was so easy. Hopefully, I didn't get in over my >head..... :) > I would try filling your cooler with gas.. ( as long as the car can be down for a couple of days to allow the cooler to dry out. Not only then will you be able to clean the cooler but also see if it leaks. Take a funnel and fill one of the holes till gas comes out the other side. Worth a try James ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org