Re: another leaking coolant mystery - Saab 900 Bulletin Board - Saabnet.com
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Re: another leaking coolant mystery
Posted by GregD (more from GregD) on Sat, 20 Jan 2001 23:35:31
In Reply to: another leaking coolant mystery, MartinW, Sat, 20 Jan 2001 19:30:16
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Check each of the hose fittings at the upper rad hose and the little elbow at the front of the head about an hour after parking it. Engine temps, and consequently coolant pressures, are often highest during "hot soak" when an engine is shut down from running temp. All the thermal energy stored in the mass of the engine suddenly has no active outlet for dissipation, and the temp rises sharply. I often see poor hose clamping points that intermittently weep under these conditions, usually the result of inadequate cleaning of the fixed side's surface prior to hose replacement. The fact that the forced leak stops and the exit point is masked by evaporation makes them tough to track down very long after the fact.
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