Quote:
Originally Posted by ThePhoenix
Because you have to pry out the black o-ring first. I was trying to avoid that in case the t-stat was still good, not wanting to damage it. Dug it out with a pick and the t-stat came right out.
By the way, the boil in water test showed no movement whatsoever. I noticed that there are loose rattly bits inside the t-stat. Is that a sure sign of a bad one?
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Turns out my t-stat was bad (the boiling water test having borne this out), see this thread for details:
Yet another 300SE/300SEL/M103 overheating/coolant change thread