1967 - 1972 F-100 & Larger F-Series Trucks
Discuss the Bumpsides Ford Truck
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OKay, why in the hell do I keep throwing one push rod? the roller rocker kit I got is a 1046 from comp cams, now every time, I get my timing set, and LOAD the motor, that one pushrod throws. I thought it was the lifter, so I used the best of the old lifters according to valve wear pattern on the bottom. Now... before I tore the motor down it had two bent push rods, either over reving, or this same possibility.. the cam is new, so I don't figure with the whole hour ive had the truck running I could have killed the duration. Could it be the valve? Help.
First of all, new cam and old lifters is a no-no, but that's not why you're bending pushrods.
I'm assuming from the Comp part number, you have an FE motor. I suspect a tight or dry valve guide. Are you getting enough oiling inside the valve cover area? I would pull the spring of the suspect valve and see how freely the valve moves in the guide. Has the truck been sitting?
You can stuff a section of rope into the spark plug hole and get the piston at TDC to avoid dropping the valve into the cylinder.
390fe yes, new cam, lifters, and I was under the impression that my lifter was pooched... I know its a no go, and the truck was running on that cylinder when I took it down 2 weeks ago. soaked the lifters in oil for 2 days, dropped it in. its getting good oil, but it was apart for two weeks. oil pressure is like 50psi start up, and if your valve covers aren't in, your really likely to throw oil everywhere.
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