Question about Dodge D150
Replace the adjustment nuts with new ones, they are a special type of nut that keeps its setting by friction between the crimp and the threads, this friction is given by a slight crimp to the nut that makes it out of round near the top of the treads, u can also install a product to the threads called Loctite red thread lock, U can also buy locking rocker arm adjustment nuts that use an allen screw to "lock" in the adjustment, these are avail from amny speed shops, one i use is Summit racing, another is Jegs speed, please keep in mind that other factors can cause this, one is low oil pressure caused by a camshaft bearings not being installed correctly, there are holes that allow oil to flow properly, if they are not lined up correctly to the block oil gallery then this can starve the lifter for oil pressure and they get noisy.
Posted on Sep 14, 2010
When I adjust mine I get about 1/8th turn from where I want it (if you
want it 1/4 turn down from "O" lash just turn it 1/8th turn down). Then I
snug up the allen screw and turn the additional 1/8th turn with the nut
only. You can tighten it much better this way versus turning the nut
first and then locking down the set screw. Never had one loosen when
done this way.
Solids are basically the same way; use the hex nut to get the correct clearance then back off 1/8th turn or so, snug the allen set screw, and turn the nut back to correct clearance.
If the top of your rocker arm studs has a crater (lack of better word) you shold file them flat, or you may end up having them loosen up again.
A couple of notes:
Many screw in studs are not straight, they wobble as you screw them in. Not too good!
ARP studs are terriffic and CHEAP for the quality of them. You have to jam the set screw down by turning the outer nut just as mentioned above.
If you just tighten the set screw down, they will usually loosen.
I've seen it happen too many times with guys who buy polly locks for the first time and do it wrong.
Posted on Sep 14, 2010
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Posted on Jan 02, 2017
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