I need to get a set of pushrods, two of mine were bent. Where is the best place to get a set of stock pushrods for non adjusteable rockers ?
1971 440 RB pushrods
- Thread starter Skytrooper
- Start date
steve340
Well-Known Member
Summit Racing sells push rods of many different lengths. Just measure the ones you have and order replacements.
66Satellite47
Well-Known Member
Might want to figure out why they are bent first.
I am digging deeper to try and determine the cause. This was a non running car that I inherited. So, I have no clue as to what was done and when.
before you pull it apart, if you have oem shaft and rockers roll the engine over and check to see if your springs are bottoming out/ coil bind.
Non-running car, chances are the valves a sticking, throw a straight edge over the valve stems to see if they all are at the same height..
Both valves were stuck. Freed them up easily enough. Now they are soaking in penetrating oil. Everything seems ok at the moment, but I am still going to take it down further to make sure the cam is properly aligned. Then the pan to check the pick up and get a good look at the bottom end.
steve340
Well-Known Member
Make sure the valves are not bent while you have a look at the engine condition.
wyrmrider
Well-Known Member
Elgin, and many others have stock pushrods
I had the same problem with varnish on the valves in my 440- bent some 3/8 smith brothers pushrods
check the cups of your stock rockers for wear
visually
and place a pushrod in its mated cup (keep track of them) and go through the motion back and forth and see if there are any catches/ ridges
late "AMC-Magnum" lifters have oil through the pushrod so I recommend the oil through the pushrod pushrods in LA length if buying new pushrods
mix up your pushrods and rockers and they are worn they are junk
install a higher lift cam on used pushrods and rockers is asking for failure with any valve spring pressure at all (there is a wear ridge on cup that gives much higher pressures as pushrods rides over it)
I had the same problem with varnish on the valves in my 440- bent some 3/8 smith brothers pushrods
check the cups of your stock rockers for wear
visually
and place a pushrod in its mated cup (keep track of them) and go through the motion back and forth and see if there are any catches/ ridges
late "AMC-Magnum" lifters have oil through the pushrod so I recommend the oil through the pushrod pushrods in LA length if buying new pushrods
mix up your pushrods and rockers and they are worn they are junk
install a higher lift cam on used pushrods and rockers is asking for failure with any valve spring pressure at all (there is a wear ridge on cup that gives much higher pressures as pushrods rides over it)
Good advice ! I have been down this road before but not with a mopar. I knew not to mix any components . I intend to completely replace all pushrods. I will be inspecting the rockers, too.
wyrmrider
Well-Known Member
I said LA length
obviously here B/RB length
remember early B/RB use a lifter with a smaller cup with smaller ball pushrod to match
do not use if early replace both the lifters and pushrods with later size- there is a reason Chrysler changed
obviously here B/RB length
remember early B/RB use a lifter with a smaller cup with smaller ball pushrod to match
do not use if early replace both the lifters and pushrods with later size- there is a reason Chrysler changed
Ok, these are the rods I have removed. Diameter is .308", Over All Length is 9.303 . I see the lengths listed at vendor sites as 9.315 or 9.295. Mine happen to fall between. I would have to conclude that this is due to wear as the tips are just a whisker flat. Also they do not have oil hole.
It sounds like I want oil hole in any new pushrod.
Stock pushrods had no oil holes, mine in the Charge have none as well.
They have 35K on them no issues and I put in a heavier Mopar spring at that time.
I would think the longer rods would work fine.
If you put a thicker gasket on like the perma torque with the heads you will be slightly farther up to the rocker pedestal, it should work fine with hydraulic lifters.
It's good to see someone do their homework instead of just slapping together stuff and then later asking questions here to see how many mistakes were made.
They have 35K on them no issues and I put in a heavier Mopar spring at that time.
I would think the longer rods would work fine.
If you put a thicker gasket on like the perma torque with the heads you will be slightly farther up to the rocker pedestal, it should work fine with hydraulic lifters.
It's good to see someone do their homework instead of just slapping together stuff and then later asking questions here to see how many mistakes were made.
Hey, I got you for a mentor and your big block rebuilding book ! Is the head gasket in the Fel-Pro KS-2110 set ok or should I grab the perma torque ?
wyrmrider
Well-Known Member
no oil hole pushrods work fine till high spring pressures and higher rpm
the uses where the pushrods push through the stock rockers
also helpful for cup and lifter ball for those kind of rockers/ pushrods where they gall and wear
the uses where the pushrods push through the stock rockers
also helpful for cup and lifter ball for those kind of rockers/ pushrods where they gall and wear
justcruisin
Well-Known Member
At what point should oil through push rods be considered. If using them should they be fitted with a restrictor, if so, what size. Is the extra oil taken from the bearings an issue if the the top end is still oiled through the cam as well?
wyrmrider
Well-Known Member
oil through the lifters really does not take oil from the bearings
the rocker lube does
and worn lifter bores are a bigger problem
I don't think rockers are as good as they once were
and are the thicker ones available from a quality source?
Most failures I saw with stock rockers was those installing a higher lift cam into worn pushrods and rockers
worn rockers have a ridge that has to ride over the pushrod if you go to higher lift
lots of pressure
even oil through the pushrod will not save this common problem
you do not see it with stock HP springs much but go bigger...
the rocker lube does
and worn lifter bores are a bigger problem
I don't think rockers are as good as they once were
and are the thicker ones available from a quality source?
Most failures I saw with stock rockers was those installing a higher lift cam into worn pushrods and rockers
worn rockers have a ridge that has to ride over the pushrod if you go to higher lift
lots of pressure
even oil through the pushrod will not save this common problem
you do not see it with stock HP springs much but go bigger...
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