Quote:
Originally Posted by babymog
The thermostat on the 60x engines is on the side of the block, and it is a really bad idea IMO to run a 60x engine without coolant in the head. Really bad.
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that being the case yes bad idea, really bad. and totally pointless, if the head has no coolant, there's nothing to make bubbles in. too bad, it's a relatively easy test. like i said, i couldn't remember where the t-stat housing is on this engine, in most of the enigines i deal with the housing is at about the highest point on the engine. top, front and centre.
but quite often if you shut it down, and hear "blub blub blub" in the waterjacket, be patient and look real close at what's going on in the overflow reservoir (even put the hose into a clear jar) you'll see the fine fizz as the level rises.
another simple diagnostic, get it up to running temp and get a feel on both the top rad hose and the bottom hose. there should be about a 20° c difference between the two, bottom being the cooler. if they are both hot to the touch, this would indicate either faulty thermostat or clogged radiator.