On 5/11/07, Bob Shell <[EMAIL PROTECTED]> wrote: > We seem to have some people here who are pretty well informed about > cars. Let me describe the mystery I am trying to solve. I have a > 1991 Volvo 940 Turbo wagon that I really love. Has always been a > very comfortable and civilized ride. <long description of burning oil. > Any suggestions?
I owned a 1988 760 turbo with the exact same engine in it. Two suggestions: 1. There is no PCV valve on that engine. But there is an oil trap, and a plastic "Y" fitting that can get gummed up with oil crud. The plastic fitting is easy to clean out and cheap to replace. The oil trap is a bit more difficult. When mine was doing the same thing, I dumped a can's worth of carb cleaner through the oil trap, and immediately changed the oil afterwards. In general, if the flame trap is clogged, you'll be getting oil seeping from the cam and front seals on the engine (take off the timing belt cover and check for this). 2. How many miles are on the turbocharger? The turbo oil seals do start to leak after a while, and this'll burn in the exhaust, usually without you seeing anything. This is not a cheap repair, but if you plan to hold onto the car longer, it may be worth getting the turbo rebuilt. If you're not running synthetic oil in the car, you should be. That'll help prolong the life of your turbocharger, and minimize the crudding-up that clogs the crankcase ventilation system. If you're putting a thousand miles a month of driving on the car, the oil usage is in the "normal" range for a fairly high-mileage engine. But if you're doing less than that, start looking for the cause. -Mat -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
