Hydraulic Lifter Lash
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Hydraulic Lifter Lash (GRX)
I have Comp. Cams ProMagnums and set zero lash plus 5/8 turn.
I've found that the adjustment between just feeling drag and not being able to twirl the push rod is ~1/8 turn; so my accuracy on zero lash is +/-1/8 turn. If I adjust lash to zero lash plus 5/8 turn I'm between 1/2-3/4 turn.
Further, I take the long route to assure the valve is on the base circle. I turn the crank till the exhaust valve is just opening and adjust the intake; I then turn the crank till the intake is just closing and adjust the exhaust.
I've found that the adjustment between just feeling drag and not being able to twirl the push rod is ~1/8 turn; so my accuracy on zero lash is +/-1/8 turn. If I adjust lash to zero lash plus 5/8 turn I'm between 1/2-3/4 turn.
Further, I take the long route to assure the valve is on the base circle. I turn the crank till the exhaust valve is just opening and adjust the intake; I then turn the crank till the intake is just closing and adjust the exhaust.
Melting Slicks
Joined: Mar 2001
Posts: 3,365
Likes: 5
From: Lake Villa IL
Cruise-In IV Veteran
Cruise-In V Veteran
St. Jude Contributor
Re: Hydraulic Lifter Lash (GRX)
The only way I can do it, is with the engine running. Then, you can do it by ear. You'll hear it in the engine. When all is well, the engine will be nice and smooth, and quiet.
I'll let someone else explain the static way, since I stink at it.
I'll let someone else explain the static way, since I stink at it.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Hydraulic Lifter Lash (joeveto)
The only way I can do it, is with the engine running. Then, you can do it by ear. You'll hear it in the engine.
RACE ON!!!
