take out the sensor and make sure the metal points are clean. I had a cracked expansion tank along the threads of the cap of the tank. You could not really see it - but it was enough to leak the coolant and trip the sensor. Pray it is not the beginning of a leaking head. Todd
-------------- Original message ---------------------- From: John Runberg <jrunberg@MAC.COM> > We'll, now that the fuel system on my '90 is sorted, the coolant system wants > attention. > > Yesterday the coolant light started blinking. Needle mid-way, rad fan works but > wasn't even on (checked function afterwards. Works correctly). Engine at > operating temp, but not overheated. Thin bit of coolant on the front lip of the > expansion tank (left side of engine, not the overflow). Level in expansion tank > looked a little low, just at the min line. Expansion tank looked a little high, > just over the max line. No apparent loss of coolant previously. > > I know of at least two things that are bad / suspect, but would like opinions on > other possibilities. > > 1) expansion tank cracked. Today, after a short drive, could see coolant > emerging from just above the lip on the expansion tank, then dripping onto the > header. > 2) thin (9mm?) line coming from expansion tank to overflow tank looks suspect, > possibly collapsed inside. > > Additional questions: > - does it make sense to replace the expansion tank cap, too? > - same deal w/ the level sensor - replace? > > Both these items are getting replaced, but would like to know opinions before I > continue. > > Much thanks :) > > john |
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