Do you need to worry about a valve lash setting?
In most cases you will not have to worry about a valve lash setting. Some manufacturers advise valves should be inspected, only if there is excessive valve train noise. However, others don’t even mention valve lash setting clearances in their maintenance schedules.
When do I need to change the Lash setting on my engine?
If your engine generates a loud clatter, it could be time for a valve lash setting adjustment. Though on some engines the valves don’t generate noise, when there’s too much clearance.
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.
What’s the procedure for adjusting the valve lash?
Valve Adjustment Procedure 1 Importance of Lifter Position. 2 Compensating for a Cold Engine When Adjusting the Valve Lash. 3 Using Valve Lash to “Tune” Engine Performance. 4 Closing Remarks & Tips: As mentioned above, the power band can change slightly on an engine using a solid lifter camshaft by varying valve lash settings.
How often should you check your valve lash?
Noise, or lack of, is no way to determine valve lash. Quiet lifters could mean tight valves, which means burned ones. Clattering valve lifters means too much lash, which can trash cam lobes, lifters, or cam followers. Lash should be checked every 30k miles IMHO.
Where can I find the valve lash clearance specs?
[b]If you look on the emission sticker under the hood, along with the sparkplug gap and timing specs, you’ll also see the valve lash clearance specs if the valves in your engine require periodic adjustment.
How does hot valve lash affect engine performance?
Using Valve Lash to “Tune” Engine Performance. For example, by reducing the amount of (hot) valve lash, the valve will open slightly sooner, provide slightly more lift (valve opening), and will close slightly later. This makes the camshaft look bigger to the engine, due to this slight increase of duration and lift.