Tim, When did the knock start? Does the engine run rough? Does it knock at all engine speeds, more at idle, more on acceleration or more on deceleration? There are only a few things that will typically cause an engine knock. The most common being 1. a rod 2. a main 3. piston slap 4. carbon build up 5. fuel pump (mechanical) & 6. timing chain. With the engine running, pull one plug wire at a time & see if the knock stops. If it does, it's most likely a rod bearing or piston slap. It will at least tell you whick cylinder is the problem. If the knock doesn't change with any of the plug wires removed try the fuel pump. Providing you have a mechanical fuel pump, remove the pump & run the engine with a little gas down the carb (be careful). If the knock stops then it's fuel pump related. Get a good engine stethoscope & listen to the engine running & try to pinpoint the knock. If it's coming from the area of the timing chain cover it's either the chain or the fuel pump cam. The knock could be a bent valve or carbon build up but usually this will cause the engine to run rough. A compression check should show a bent valve. Hope this helps, Don
> First off, its a 454. I have a knock in it, and I cant think of anything else to check to see if its gone bad. Ive checked the push rods, the timing chain, rod bearings, crankshaft bearings, and wrist pins. My timing was retarted, and it was quiter, When adjusted correctly with a timing gun and everything, The knock is alot louder. When the timing is retartded, it sounds like its on the drivers side, towards the rear, but when in the right timing spot, loud, and cant tell what side its on. I ran a compression test, lots of compression, and it has lots of oil pressure. Any suggestiongs would be greatly appreciated. > Thanks for your time, > Tim > > ----------------------------------------------------- > To Unsubscribe please visit www.chevelles.net/list.html > To start a new topic, send mail to: [EMAIL PROTECTED] > ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
