Valve lash
Thread Starter
Instructor
Joined: Sep 2015
Posts: 143
Likes: 25
Valve lash
Hello,
92 lt1. A year ago. First time ever replacing head gasket and adjusting valve lash. Drivers side. Really had nothing to go by , and no timing marks. Got my information from the forum . Thank you so much. I only adjusted the side the gasket was replaced on, and figured out tdc from the number one valves open and closing. I spun the pushrods until it stopped turning and tighten down about 1 1/2 ish on cold engine. Car runs good, but when at operating temp. Sounds like a sewing machine on the one side. Do I have to go all the way back to step one, or can I go another full turn on cold engine ?
92 lt1. A year ago. First time ever replacing head gasket and adjusting valve lash. Drivers side. Really had nothing to go by , and no timing marks. Got my information from the forum . Thank you so much. I only adjusted the side the gasket was replaced on, and figured out tdc from the number one valves open and closing. I spun the pushrods until it stopped turning and tighten down about 1 1/2 ish on cold engine. Car runs good, but when at operating temp. Sounds like a sewing machine on the one side. Do I have to go all the way back to step one, or can I go another full turn on cold engine ?
Safety Car
Joined: Aug 2009
Posts: 3,745
Likes: 275
From: Melbourne, Victoria, Australia
Hello,
92 lt1. A year ago. First time ever replacing head gasket and adjusting valve lash. Drivers side. Really had nothing to go by , and no timing marks. Got my information from the forum . Thank you so much. I only adjusted the side the gasket was replaced on, and figured out tdc from the number one valves open and closing. I spun the pushrods until it stopped turning and tighten down about 1 1/2 ish on cold engine. Car runs good, but when at operating temp. Sounds like a sewing machine on the one side. Do I have to go all the way back to step one, or can I go another full turn on cold engine ?
92 lt1. A year ago. First time ever replacing head gasket and adjusting valve lash. Drivers side. Really had nothing to go by , and no timing marks. Got my information from the forum . Thank you so much. I only adjusted the side the gasket was replaced on, and figured out tdc from the number one valves open and closing. I spun the pushrods until it stopped turning and tighten down about 1 1/2 ish on cold engine. Car runs good, but when at operating temp. Sounds like a sewing machine on the one side. Do I have to go all the way back to step one, or can I go another full turn on cold engine ?
The general rule of thumb regarding valve lash should be 1 turn from zero lash, however some lifters require less. I found that out with my new engine build, did the std one turn from zero lash and some of the valves were not closing fully.
Did some searching on the lifters manufacturer, turns out they only needed half a turn from zero lash.
The new lifters also needed to be soaked in an oil bath and primed.
I also had a noise issue, i got an old valve cover and drilled holes to allow me to adjust the valve lash while the engine was running.
That got a few loose ones to quieten down.
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Hi
The general rule of thumb regarding valve lash should be 1 turn from zero lash, however some lifters require less. I found that out with my new engine build, did the std one turn from zero lash and some of the valves were not closing fully.
Did some searching on the lifters manufacturer, turns out they only needed half a turn from zero lash.
The new lifters also needed to be soaked in an oil bath and primed.
I also had a noise issue, i got an old valve cover and drilled holes to allow me to adjust the valve lash while the engine was running.
That got a few loose ones to quieten down.
The general rule of thumb regarding valve lash should be 1 turn from zero lash, however some lifters require less. I found that out with my new engine build, did the std one turn from zero lash and some of the valves were not closing fully.
Did some searching on the lifters manufacturer, turns out they only needed half a turn from zero lash.
The new lifters also needed to be soaked in an oil bath and primed.
I also had a noise issue, i got an old valve cover and drilled holes to allow me to adjust the valve lash while the engine was running.
That got a few loose ones to quieten down.
Instructor
Joined: Nov 2015
Posts: 231
Likes: 32
From: Cumming Georgia
Hope it helps.
D.
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Take the new lifters and soak in oil, I normally do it for 24 hours, and right before install, I actually pump the actuator of the lifter a few times until no bubbles come out. As an additional step, I would also turn the oilpump with a drill, once everything was back together, until it develops pressure. Easy stuff...
Hope it helps.
D.
Hope it helps.
D.
Last edited by 9T3VETTE; Apr 17, 2017 at 02:27 PM.
