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Old July 20th, 2018, 08:37
Hotwire Hotwire is offline
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Join Date: Nov 2011
Location: Burford, Ontario
Posts: 37
Knock on warm up

When I start it cold, it starts right up, its smooth idle, no knock or even a tick, Sounds like this:

The guages show a smooth idle, Good / consistant oil pressure, and the fact that you can barely hear the engine running is a bit of a testiment to the situation (the doors and hood are all open), But when it warms up, the oil pressure drops, and it starts to tick then rattle at idle. Its not a constant tick or rattle, only when the pressure dips. If I bring the RPM's up, the oil pressure becomes steady and rises as it should.

On a hot start there is a bad rattle for a second then it goes away, but the oil pressure fluctuates a lot, and when the pressure dips, it starts to tick, rattle and clack.

My first thought is to do a rod and crank bearing refresh, check the oil pump, and pick up.

I just bought this, its got a fresh oil change by the previous owner, as well as a fresh valve cover gasket.. thats weeping. I have a feeling its hiding some nasties.

Any suggestions?
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Old July 20th, 2018, 08:53
RCP Phx RCP Phx is offline
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Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,236
Re: Knock on warm up

Post a vid of the noise!
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