Sat Jun 7 09:06:54 PDT 2008
Do the heater fans cut in [ both of them] or both speeds if it is a singular
----- Original Message -----
From: "William J Toensing" <toensing at wildblue.net>
To: <vwdiesel at vwfans.com>
Sent: Tuesday, July 22, 2008 10:42 AM
Subject: [Vwdiesel] Quantum questions?
> My Quantum TD is still loosing water & then overheating. Stop leak hasn't
> helped. The water loss seems to come from the coolant expansion tank which
> is now cracked. Suspecting a leaky head gasket, I bought a testing device
> at our local Napa Auto parts store. It works by pulling any exhaust gas
> that may have entered the cooling system into a device you put on the hole
> where the "radiator cap" screws onto the expansion tank. If any exhaust
> gas is present it is supposed to change the blue color of the test liquid
> you poor into the cap you place on top of the cap hole from a bright blue
> to yellow green for diesels & yellow for gas engines. Mine stayed a bright
> blue suggesting the problem is something else The prior owner said he took
> it to a local garage & were unable to diagnose the problem, which he said
> happens on mountain grades & hot weather. Temperature this afternoon was
> about 90 F. I think this is why he gave up on the Quantum. I wonder if a
> sticky thermostat or partially plugged radiator could be the cause?
> Something else? When pressure builds up in the cooling system, shouldn't
> the expansion tank coolant cap release the pressure? I just put on a new
> I also say what looked like a leak from the rear of the injection pump
> with the engine warm & ideling. Will check to see if everything is tight .
> Anything I should check for?
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> Vwdiesel at vwfans.com
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