Well at long last we fired up the rebuilt engine today and we have a mystery squeak driving us a bit mad. The noise sounds like you would expect from a dry pushrod -on/off/on/off etc rather than a constant squeal.
Naturally we re-checked everything in the top of the engine. All had been lubed and all was getting lube and turning freely. We isolated and moved each rocker arm to try to isolate the noise but no luck. We double checked the valve guides and the stem seals and everything looked fine. The noise is present even just cranking the engine.
When all of the spark plugs were removed the noise ceased but returned when any one plug was put in so somehow the compression is driving the noise.We are kind of looking towards the crankshaft at present but can't isolate the noise so far.
In rebuilding the engine we had the crankshaft turned and used Helms custom thrust washers and have .006 movement per the manual.Other mods include shaving the head .125 to 9-1c/r,Goodparts GP2 cam with shortend pushrods and single springs,Fidenza flywheel and Patton's TBI system.
I talked to 2 local LBC shops who suggested taking it out on the highway to see if it would wear in or blow-up but I'm kinda hesitant to go that route so far( go figure!)
Any help/suggestions would be greatly appreciated!!!
Thanks,
Elysium
Naturally we re-checked everything in the top of the engine. All had been lubed and all was getting lube and turning freely. We isolated and moved each rocker arm to try to isolate the noise but no luck. We double checked the valve guides and the stem seals and everything looked fine. The noise is present even just cranking the engine.
When all of the spark plugs were removed the noise ceased but returned when any one plug was put in so somehow the compression is driving the noise.We are kind of looking towards the crankshaft at present but can't isolate the noise so far.
In rebuilding the engine we had the crankshaft turned and used Helms custom thrust washers and have .006 movement per the manual.Other mods include shaving the head .125 to 9-1c/r,Goodparts GP2 cam with shortend pushrods and single springs,Fidenza flywheel and Patton's TBI system.
I talked to 2 local LBC shops who suggested taking it out on the highway to see if it would wear in or blow-up but I'm kinda hesitant to go that route so far( go figure!)
Any help/suggestions would be greatly appreciated!!!
Thanks,
Elysium