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Registered
Join Date: Dec 2018
Location: Minneapolis
Posts: 59
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1991 928 engine overheat
How bad is it when you overheat a 928. The car ran just fine and now after the overheat it will not start. What happens when you overheat one of these?
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08-28-2020, 04:41 PM
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Registered
Join Date: Mar 2010
Location: Texas
Posts: 2,135
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Overheating can cause damage in lots of different ways: warped heads, burnt valves, further loss of coolant. It can cause the impeller to come off the shaft of the water pump, or that could be cause of the overheating. Before trying to start the engine, I would compression test the cylinders to verify that you haven't burnt valves or warped heads. Generally, nothing good happens when you overheat an aluminum engine.
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John Curry (Drift King) 928OC member Grand Prix White 1994 GTS AT (The GTS) Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car) 1986 Euro AT Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz) |
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08-28-2020, 07:19 PM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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Heads warp, crack, etc and coolant can leak into a cylinder, coolant like water will not compress, hydrolocked.
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08-29-2020, 08:41 PM
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