What happens if the Lash on a valve is too tight?
What happens if the Lash on a valve is too tight?
If the lash is too tight, the intake valve may hang open. Some engines have the valve-lash adjustment on the pushrod, like this early Hemi. Here’s a rocker arm with the adjustment on the pushrod end. “You can also burn a valve if it’s not fully seated,” adds Godbold.
What do you need to know about lash adjustment?
– Steve Brule, Westech Performance “Lash is required to deal with the change in adjustment from hot to cold as the metal expansion rates differ between the block, heads, pushrod, valves and other components,” explains Billy Godbold of Comp Cams.
What happens when the Lash setting is too loose?
If the lash setting is too loose or excessive, the valvetrain takes a severe beating. The rocker arm acts like a sledgehammer by building up momentum with the extra distance and pounds the valve tip. Much of that force is reflected back through the rocker and pushrod to the lifter.
When to use a tight-Lash camshaft in an engine?
“A tight-lash camshaft may permit the valve to initially accelerate and decelerate more quickly without being overly harsh, but may not be of practical use in situations where engine growth from cold to hot will require resetting the lash frequently,” says Knight, noting that engine materials play a critical role in such camshaft decisions.
If the lash is too tight, the intake valve may hang open. Some engines have the valve-lash adjustment on the pushrod, like this early Hemi. Here’s a rocker arm with the adjustment on the pushrod end. “You can also burn a valve if it’s not fully seated,” adds Godbold.
How do you set the valve lash on an inline 6 Altorfer?
STEP 1: Remove all valve covers from the engine. STEP 2: Rotate the crankshaft until the engine is at TDC #1 using the reference marks on the flywheel. Check the rocker arms on cylinder #1, which is the cylinder at the front right corner of the engine.
How to adjust the valve lash on a lifter roller?
Use a soft mallet to ensure that the lifter roller seats against the camshaft’s base circle. Make an adjustment to the valve lash on the inlet valves for cylinders 1, 2, and 4.
– Steve Brule, Westech Performance “Lash is required to deal with the change in adjustment from hot to cold as the metal expansion rates differ between the block, heads, pushrod, valves and other components,” explains Billy Godbold of Comp Cams.
