PBM hyd roller lifter preload?
#1
Registered
Thread Starter
Join Date: Aug 2010
Posts: 322
Likes: 0
Received 0 Likes
on
0 Posts
PBM hyd roller lifter preload?
I have start my engine with all new parts in them, and after about 10 min the engine start to make a lifter noise on both side. I have preload them one turn after the zero lash (.050) preload, so now i dont know if they are too tight or too loose, They are PBM parts no: (RL 931).
I have start the engine with mercruiser 25W40 mineral oil i dont know if it can be a oil grade problem, my oil pressure is at 80 psi at 105f engine temp idle.
Any sugestion?
I have start the engine with mercruiser 25W40 mineral oil i dont know if it can be a oil grade problem, my oil pressure is at 80 psi at 105f engine temp idle.
Any sugestion?
#3
Registered
Join Date: Aug 2009
Location: CONCORD, CALIF
Posts: 410
Likes: 0
Received 0 Likes
on
0 Posts
There's a real good post on morel litter preload in here with some VERY good info from Bob Madara / "rmbuilder ". If I recall correctly preload should be 3/4 turn (with alum. heads) and 1/2 turn (with iron heads) using a 7/16-20 rocker arm stud.
#5
VIP Member
VIP Member
I ended up setting mine and a pair I did for a friend, down
to 1 turn down to quiet them down...same symptom
as you discribe.
to 1 turn down to quiet them down...same symptom
as you discribe.