302 Valve train
#1
302 Valve train
Greetings to all.
I have a 1971 Ford 302 installed in my Ford F-1. My issue is with adjusting or doing the initial setting of the valves. It has hydraulic lifters and standard length pushrods. The engine has just been rebuilt and this is the initial run-in. I did the initial valve/rocker arm adjustment just as the shop manual and other references specified. This engine has non-adjustable rocker arms that just require an initial pre-load and then torqued to the specified torque (18-20 ft-lbs). A mild Compcam cam has also been installed. The heads were planed but I do not know how much.The issue is that when I start it the thing sounds like a threshing machine and upon reving it up to about 1500 rpm or so some of the rocker arms will come off the pushrods. I have redone the adjustment 4 or 5 times but this obviously not the problem. My thought now is that I don't have the correct pushrod lengths.
Any suggestions or help would be greatly appreciated before I just shoot it and be done!!
Thanks
I have a 1971 Ford 302 installed in my Ford F-1. My issue is with adjusting or doing the initial setting of the valves. It has hydraulic lifters and standard length pushrods. The engine has just been rebuilt and this is the initial run-in. I did the initial valve/rocker arm adjustment just as the shop manual and other references specified. This engine has non-adjustable rocker arms that just require an initial pre-load and then torqued to the specified torque (18-20 ft-lbs). A mild Compcam cam has also been installed. The heads were planed but I do not know how much.The issue is that when I start it the thing sounds like a threshing machine and upon reving it up to about 1500 rpm or so some of the rocker arms will come off the pushrods. I have redone the adjustment 4 or 5 times but this obviously not the problem. My thought now is that I don't have the correct pushrod lengths.
Any suggestions or help would be greatly appreciated before I just shoot it and be done!!
Thanks
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