Engine knock on startup when extremely cold
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Engine knock on startup when extremely cold - 3/13/2008 6:50:57 AM
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w3dbj
Posts: 5
Joined: 3/13/2008 Status: offline
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Hello, I have just bought a 91 Stealth ES DOHC. When the weather is cold out (below 30 degrees) when I start the car, there's a rapping from what sounds like the bottom end. It goes away after 30 seconds or so and doesn't come back again. When the car has been sitting all day and the temp is above 30 degrees outside, or when the engine is warm, no knocking at all. I can leave the car for days, come out and start it if it's not cold outside, and there's no noise. Is this a sign of oil pump problems, poor choice of oil, or a more serious engine problem (bearings)?
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