push rod ohv question

[chessman21]

i think i got a tapping lifter maybe so it sounds. can the top of the lifter be accessed with straw/carburetor spray through the rod hole? Or is this even possible on this engine?

i changed the oil/filter with O'Reilly brand 5/30 then added bout 10oz of seafoam put 500 miles on it changed again oil/filter to castrol gtx 5/30 with one quart replaced with Lucas synthetic. 300 miles so far & i still got the tic.


Marvel Mystery Oil?

 

[AllanD]

Marvel Mystery oil may do you some good, but "tapping noises"
from a 4.0 are usually caused by the pushrod Vs rocker arm wear/Galling


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[TxGasRacer]

There is NOT a hole in the pushrods so there is NO oil going through the push rods and this is what causes the rocker arms and push rods to wear out on the OHV v6 engines.You might have a stuck lifter,but it could just as easily be the excessive clearance between your rocker arms and push rods.

 

[Rustbucket350]

The pushrod oiling system is severely lacking without an oil hole through the pushrod. I replaced two of mine on a 48k motor that had the tips ground down but the other 10 had perfect wear. The melling pushrods look to be made of a harder material but you'll have to inspect the rockers or replace them as well.

 

[AllanD]

One correction I've done on a 4.0 engine is to champfer the oil hole in the rocker arm end of the pushrod tom try to capture as much of the oil that it flying around under the valve-cover at operating speed.

This can easily be done with a drill and a countersink or a die grinder and a carbide burr.

My method was to make the end of the rocker arm into a "funnel"

it seems to have worked, but it also might have been the generous application of
moly paste grease (cam break-in lube) that I applied inside the pushrod sockets and to the ends of the push rods....

YES, it needs to be remembered this is a FORD 4.0 not a Chevrolet "small block", the pushrods are
NOT part of the oil delivery system to the valve-train.


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