what causes and engine knock?
Laughing Gas
Joined: Dec 2007
Posts: 796
Likes: 1
From: Minnesota
Here's something that hapened to me recently that could have hapened to you. I am running a stock distributor on my 429 and the vacuum advance plate would get stuck on one of the plate screws and then it would be way advanced. Just might be spark knock from the same thing. I had to grind off one of the screws on the plate a little. It happened a couple of times till I figured it out. You should still check your filter for metal and change your oil, but might be something else to check out.
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Posting Guru
Joined: Oct 2005
Posts: 1,305
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From: Wisconsin
well finally got around to an oil change today, got a new filter and dumped in some shell 15-40. it idled a little smoother i noticed also on some freash oil.
cut open the old oil filter and there was mostly just gunk in there. i ran my finger through the paper "fins" and got some of that gunk on my finger, then took a magnet to see if anything was magnetic. and nothing was. i saw nothing shiney or anything that looked like metal shavings.
is there anything else i should look for?
ohh and my darn camera's batterys were dead so no pics till i pick some up.
Mitch
cut open the old oil filter and there was mostly just gunk in there. i ran my finger through the paper "fins" and got some of that gunk on my finger, then took a magnet to see if anything was magnetic. and nothing was. i saw nothing shiney or anything that looked like metal shavings.
is there anything else i should look for?
ohh and my darn camera's batterys were dead so no pics till i pick some up.
Mitch
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Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
It was detonation due to the overheated cylinder heads, Once they cooled off a bit, it went away. Nothing to worry about.
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