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Losing Coolant 900 1994

posted by  JB945t on  Sat Oct 18 09:49 CST 2008
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last visit: Fri Jul 13 15:56 CST 2012
[RELATED]

Could be a couple places, my first guess would be the coolant bypass line.
That is the metal tube that slides into the back of the water pump, if you trace it you'll see that it runs along the side of the engine under the exhaust manifold then curves behind the head where it meets a rubber hose that continues on to the heater control valve. It's possible that that line has deteriorated and is leaking somewhere in the metal tube(the tab welded to it that mounts to the block comes to mind) but more likely at the connection to the rubber heater hose.
The second place to check would be the coolant lines that go to the oil cooler on the oil filter mount. They tend to get oil and road grime on them and soften to point of failure. Inspect these and replace them if they aren't in good condition even if they are not leaking, if one of these fails while your going down the highway you can do damage in a hurry.






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