help with bent pushrods
#1
help with bent pushrods
hello i am working on a 1986 f-150 351 w. the motor was pull for a refresh nothing to special then things got fun. stock block .30 over bore. stock heads with screw in studs comp guide plates and roller tip rockers and a eddy intake where all on this motor before the refresh tare down. motor went to the shop to get looked over. while it was there a stroker crank got throw into the mix. everything checked out fine according to the machine shop. put the motor together a friend was helping with the assembly. the rockers where not tightened according to comp specs. they where just tighten down. motor has never ran but has been cranked. didnt sound right so a valve cover came back off for a retime. the number one intake valve rocker was off the tip of the valve and the pushrod was bent. all rockers where taken back off and about 8 where bent a mix of intake and exhaust. some where bent real bad others just a little. new pushrods have been put in and the rockers left really lose. on turning the motor over when the valves open the push rods get really tight. the block nor the heads have been decked. i am at a lost here everything is the same other than the crank and cam. could have the timing chain been installed wrong? or maybe with new cam and such could the push rods be to long? thank you for your time.
#3
yes i understand that no stock heads have screw in studs. these have been machined to have them with guide plates. i also understand that the comp roller tip rockers have a lash procedure to them that is why i stated that wasnt done. i am wondering if this is what is causing my push rods to bend. i do not know the specs the cam is. it is nothing to radical. all the valve train was in the motor to begin with.
#4
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