Re: Problem with Engine Knock

Posted by Tim Cole On 2008/3/9 21:08:01

You should be able to pin point a cause without tearing into the poor thing.

For one rod bearing knocks don't get better as the engine warms up, they get worse.

Don't rule out the fuel pump.

Lets suppose you have a piston problem. If the car doesn't miss then you can hook up a compression tester to each cylinder and start the engine. If you have a low relative reading on one cylinder then look for a broken ring or a stuck ring. Be sure to ground out the plug wire or you will damage the coil.

A damaged piston will also show up as a low first puff during a static compression test.

You could also have loose carbon banging around in there too.

Another likely culprit is a sticking valve. That you can find with a vacuum tester.