Date: Mon, 12 Sep 2005 20:31:14 -0400 From: ma_twain <ma_twainnospamo.com> Subject: Re: nospam$# oil cooler!
SmaartAasSaabr wrote: > gw wrote: > >>I already bought the cooler and installed it, so it's a moot point. The only >>US car it might have showed up in was the Cadillac Catera. I didn't think to >>check at the time. >> >>It's the idiotic design that bothers me more than anything else. An >>air-to-oil cooler was fine for the turbo cars, and for just about any other >>engine I've seen. Why bury a cooler in the V of the engine? I've heard of >>these things failing in as little as 18,000 miles. >> >>I suppose I shouldn't be surprised after the timing belt fiasco.... >> >>Thanks again, GM. >> > > The advantage to a water-oil cooler is that the oil is maintained > somewhere around the temperature of the coolant, slightly higher, > continously. With the Saab Turbo-type air/oil cooler, the oil can be > overcooled in high-speed low-load (ie coasting at 100 mi/h) situations, > while it can overheat in high-load low-speed situations (dicing through > traffic, towing a trailer uphill). > > I don't know of many turbos used to tow. I would never consider using a SPG turbo to tow. Another GM design winner was putting the lower radiator hose close to the exhaust system. So when the cable tie breaks the hose touches the exhaust system with the expected result. This is a tow in job at best or an overheated engine if the hole is burned through in rush hour traffic.