Trouble with oiling to rocker shafts

gkent

Well-Known Member
Local time
3:29 PM
Joined
Aug 8, 2012
Messages
4,336
Reaction score
4,613
Location
Ontario, Canada
Anyway, the option is there. But more preload generally results in less lift or the valves not completely closing.
 

gtxrt

FBBO Gold Member
FBBO Gold Member
Local time
3:29 PM
Joined
Feb 18, 2021
Messages
210
Reaction score
101
Location
central ny
Because the oil pressure maintains the preload. In order to be noisy the lifter(s) would have to bleed down.
and they do. my gtx's and and rt's came from the factory with over .100 preload. most non performance lifters have .160 to .200 travel
 

gtxrt

FBBO Gold Member
FBBO Gold Member
Local time
3:29 PM
Joined
Feb 18, 2021
Messages
210
Reaction score
101
Location
central ny
l drove around for years with noisy lifters more after a getting on it because Hughes engines and others said. 025-.030. now Hughes is saying .080- .095.
 

Mark1972

Well-Known Member
Local time
2:29 PM
Joined
Jun 26, 2018
Messages
326
Reaction score
251
Location
Winnipeg
Did another 1/4 turn of preload(3/4 total), and the clattering noise stopped. Valve covers are going back on. Car idled perfectly but we'll see how it feels on the road.
 
Top