[Vwdiesel] More Quantum questions?

William J Toensing toensing at wildblue.net
Sat Oct 11 21:17:08 PDT 2008

Still having overheating problems. Frankly, I suspect a head gasket although the leak detector is negative. My next step will be to install a new temperature sending unit in the radiator as the fans did not turn on even though there were signs of boiling in the overflow container. Also, when I pressure tested the cooling system, it held its pressure but when I released it, some bubbling occurred as if some compressed air was trapped in the cooling system. What is the best way to bleed air out of the cooling system? I have ordered a new radiator, in case I need a new one, & a head gasket set too. 

A couple of questions: 1)Is the head gasket the same for the Quantum turbodiesel as for the Dasher & Rabbit diesels? The local parts house says it is. 2)What is the best way to bleed air from the cooling system? 3) Any particular tricks to rebuilding the vacuum pump? I suspect mine has gone bad as the brakes are much harder than they used to be. I ordered a vacuum pump rebuild pump as well. Are the Quantum diesel vacuum pumps interchangeable with the Dasher diesels?
Bill Toensing, Nevada City, CA

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