knocking

i have a 390 bored .040 and it about 25000 miles and i seem to have a problem with it knocking when it gets warm, it doesnt knock when i get in it in the morning and start it up can anyone help me point it out im assuming its the connecting rod cuz it happens and engine speed and gets louder with engine speed and it runs perfectly except for that knocking sound the exhaist sounds perfect, no backfiring or nothing, i just need a second opinion on this to help me pinpoint it out.

Have you tried listening to the engine with a automotive stethescope to pinpoint the noise?

64 Galaxie 428CJ Tri Power
65 Mustang "67"289HiPo 4spd 4wdb (road racer)
67 Mustang Scode coupe 427 top oiler

<font size=-1>[ This Message was edited by: Brett on 11/10/02 5:55am ]</font>

yes i have and it was the number 7 piston and i just got done fixin it and the problem now is the oil pan it aint as easy as u think it is pulling it off

have you checked your engine mounts? If they are broken on one side they will knock like a bad rod. The engine rocks on one mount and clunks on the other.


64 Galaxie 500XL 428CJ Tri Power
65 Mustang "67"289HiPo 4spd 4wdb (Road racer)
67 Mustang GT Scode coupe 427 top oiler

no i havent but im gonna try that, i change 2 connecting rod bearings and it still did the same thing

and it still is knockin im suspecting the main bearing though, cuz i pulled the spark plug wire on the 7th cylinder and it went away and when i reconnect it there it goes again and its not the timing cuz i set that already and im gonna check the main bearing that i suspect next weekend maybe ill hav some luck and the motor mount i just had recently replace so its not that.