Looking for info on our thrust problem -wrote the cam supplier with the issue, but as yet 3 days now, still no answer so we are hoping members can shed some light on what we might be missing. Big Block 496 Gen 6 block converted to nylon thrust button setup with aftermarket aluminum timing cover and double roller timing chain.
We previously had a Mutha thumper cam in the engine (engine has never ran), doing the thrust check on the Mutha it had 3" one way 7" the other way for a total of 10 or so... The new billet cam with nothing else changed in the engine seems to have a preload on the cam now after installation. We still have about 10" of thrust play, but only when a screwdriver is applied pushing the cam forward. Remove the screwdriver and the cam literally snaps rearward in the engine.
Bottom timing gear is installed fully to the edge of the forged Eagle crank, exactly where it was when using the Mutha thumper cam. Both gears appear to align vertically. Not sure what is keeping the cam forced rearward in the engine. Or how safe it is to leave it alone!
Options suggestions anyone!?
57Chevy
We previously had a Mutha thumper cam in the engine (engine has never ran), doing the thrust check on the Mutha it had 3" one way 7" the other way for a total of 10 or so... The new billet cam with nothing else changed in the engine seems to have a preload on the cam now after installation. We still have about 10" of thrust play, but only when a screwdriver is applied pushing the cam forward. Remove the screwdriver and the cam literally snaps rearward in the engine.
Bottom timing gear is installed fully to the edge of the forged Eagle crank, exactly where it was when using the Mutha thumper cam. Both gears appear to align vertically. Not sure what is keeping the cam forced rearward in the engine. Or how safe it is to leave it alone!
Options suggestions anyone!?
57Chevy
