[mustang69hm]

In rebuilding my Heads the last couple of weeks I found out something Interesting. The 351Windsor came with two different size pushrods. Shorter in the 2bbl and longer in the 4 bbl. I upgraded my 2 bbl to a 4 bbl along time ago but I dodn't know this. I have the 4 bbl heads and everything. Should I get the longer ones? What do longer pushrods do? Thanks guys ~Heath

 

[Guest]

the length of the pushrod will determine where the rocker arm will press against the valve.
It is important to the health of your engine that it should be centered in the top of the
valve stem. Select the correct pushrod. It might be the short ones you have or the long ones
or it might be a new set.
jimbo

M.C.A.# 50000
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[mustang69hm]

That might have been the problem with me wearing out the tops of the valves and the rocker arms. Maybe I need the longer ones. So it has nothing to do with adding lift. Thanks Heath

 

[mstngjoe]

One way to check the valve train geometry is to coat the tip of the valve with some "Dykem". Then adjust the rocker arm as normal. Turn the crankshaft over by hand two full turns. Loosen the rocker and inspect the top of the valve for the wear pattern. Ideally, it will be centered. If not, go long or short on the pushrod to get it there.

65 FB "J" 302 lots of mods. 94 GT K&N only.
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