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Coolent level drops!!

983 Views 4 Replies 4 Participants Last post by  cheetah_rider
I have a 1997 catera. I just added a coolent two weeks ago after I see the radiator light in the dashboard and it is showing now again and when see the coolent in the clear tank it was dropped below the level. I don't know is this a normal thing? Any suggestions/thoughts would be greatly appreciated.
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Gaskets and heater control valve is all I can think of
1) radiator - check for leaks on driver's side above the red drain knob. I've seen three leaking there. Could get lucky and have a leak from a loose pressure switch or coolant temp sensor (also on that side)
2) HCV - search for the heater control valve ya will find lots about it.
3) heater core - look for a small tube in the floorboard above the passenger side of the tranny. It comes out thru a grommet. This is the drain from the heater core box, if it is dripping antifreeze thats where it is coming from.
4) Oil Cooler / seal plate - will cause leaks out the back side of the engine
5) Coolant crossover - the bolts with the metal / rubber seals can leak
6) a multitude of hose connections - not a simple 'it goes in here comes out there' setup - large metal coolant pipe has a seal at the back of the block; hoses for the two electric water pumps; intake manifold inlet and outlet...
7) Mechanical water pump - behind timing chain cover. Could leak out shaft seal or the O-ring seal on the backside.

Head gasket leak? Be careful if a mechanic suggests that. Sure it happens but there are a lot of other sources to weed thru first. If you have rode the redline on the temp then bets are off.

FYI second week and into the second thousand on the now happy refurbished Cat. 95 outside, 65 inside, and the heat gauge at half. Never thought I'd see it :worship:
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It will help if you completely degrease the motor first. The wind that rushes through an engine compartment can sometimes make leaks look like they are coming from different places.
Thanks for the info. Actully I just saw the leaks and didn't find any. I topped off with Prestone 50/50 (no water needed) but, the notes on radiator says "Dex cool" coolant only. Is that affects anything? Please advise.
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