burnt pushrods

[perfconn]

Andy,
Better keep looking.Too much lash won't burn pushrods.I had a Cam Dynamics roller cam that John Lingenfelter had me running it with. 040 valve lash.Ran fine never hurt anything.Cam card called for. 020 lash.

[DaveBauerSS6]

lol i am the motorman dave i have a day job ya know and i know i know dont quit it lol??? but your still right too stressful let the pros do it next time. it was determined that there was a lash problem on the one side everything else checks out no oil problem no geometry problem pushrods not rubbing onlything it could have been was lash was too much 10 of pushrods lived the first time then when replaces w second set of pushrods the cups must have been damaged too on one of them because it did it again on one pr so we are calling it human error the first time and stupid human error the second time. got all new pushrods n cups over the holiday pulled pan and manifold and double checked everything looked ok reprimed and restarted ok no problems yet but wont go to the track for a while. murphys law got us again

Did you run the motor with the valve cover off and see how much oil was running? Pull both and compare?

[racer69]

I agree with these two. The one the done it due to the undrilled lifter, the owner didnt have cash to change it all out. Just the push rod and went. That Motor just put in 200 laps on 1/2 mile high bank Salem Speedway! Well make that like 195 or so.....his gear choice was very bad and went laps down! But the pushrod and cup were fine after. Check for oil with covers off at least!

[rfl81]

Make sure distributor depth is accurate @ manifold hole,....if distributor shaft oil galley sealing rings are not in proper place , they will block oil galley transfer at back of block, motor will not receive adequate oiling to both banks.

[t39racer]

Quite often oil restrictors are installed in the small hole that goes from under the rear cam bearing down to the lifter galleries. One of these could be partially or completely clogged. You could check the right side by spinning the oil pump with the dist out and lok down to see how much oil is coming out of the galley hole.