Why are my roller lifters not working properly?
That is because the oil flow to the rocker arms will be restricted by 30% with edge orifice lifters. Stock pivot ball type rocker arms would likely gall and seize due to lack of oil. The poor man’s solution is to use grooved rocker balls. That may or may not work, depending on the valve spring pressure.
What kind of oil does a roller lifter use?
HIPPO oiling features oil metering hole that delivers plenty of lubrication to the needle bearings and pin. Precision oil metering holes deliver plenty of oil flow to the overhead, vital for longer pushrod and valve spring life. Crower roller lifter tappets feature crowned bearings and crowned outer race that greatly reduces lobe tracking.
What should the GM clearance be for a roller lifter?
GM spec on lifter to bore clearance for a hyd roller lifter to function properly is .0015 to .0018″. One needs to check lifter bores and lifters to make sure you fall in the General clearance window. This is how the lifter gets oil so it can function. Just as important as rod and main bearing clearances.
Why are roller lifters not forked or forked?
The roller wheel is not forked, leaving the lifter full bodied. They also fit much tighter in the lifter bore. This reduced rock in the lifter bore which was VERY pronounced with the big name roller when lifted by the cam. They also adjusted easier and just felt more consistent when adjusting.
Do you need roller rockers for hi lift cams?
The S&S Premium lifters are as good as any for hi-lift cams. However, roller rockers will not reduce valve train noise; they make more noise than OEM rockers. You can run the OEM rockers with no issues up to .610″ lift; some say to .625″.
Where does oil come from on roller lifters?
Oil makes it through all of the lifter bores, and comes out the top into the galley. However, we’re not getting any oil through the top of the lifters. A builder we spoke to said to grind out passages on the lifters from the oil groove to the hole, but I wanted to check here before grinding/milling on these roller lifters. Any ideas?
What should I do about my roller rockers on my Harley?
I would also suggest installing a set of “rocker lockers”, cheap and they keep the rocker shaft from moving in the support plate which is a common source of noise in the Harley valve train. What Dolt said. FWIW, it may be beneficial to try the rocker lockers first.
Can a roller rocker reduce valve train noise?
However, roller rockers will not reduce valve train noise; they make more noise than OEM rockers. You can run the OEM rockers with no issues up to .610″ lift; some say to .625″.