What is the definition of a valve lash?

What is the definition of a valve lash?

Now for a definition: Valve lash is the measurement of air space between the rocker arm and the tip of the valve stem during that portion of cam revolution where the lifter is riding on the base circle, the valvetrain is relaxed, and the valve spring is holding the valve fully closed.

What are valve lash specs for a Honda engine?

Clicking this will make more experts see the question and we will remind you when it gets answered. You can’t post conmments that contain an email address. My 2008 Chevy Cobalt ran hot I replaced the radiator now the car won’t start it sound like I’m out of gas but I’m not.

What’s the best way to adjust a valve lash?

Plus, there’s a downside to overly tight valve lash. Perhaps the most popular method of adjusting valve lash is with a polylock on a stud-mounted rocker. There’s an adjustment nut and a locking screw that work together to properly position the rocker. “We’re talking opening and seating velocity.

How does lash affect the valve lift profile?

“The combustion gasses act like a plasma cutter on the seat and valve face.” With regards to cam design, lash affects the lower ends of the valve-lift profile. Those areas of the curve help “gently” open and close the valve.

What do you need to know about valve lash?

Setting and adjusting valve lash is often overlooked as simplistic and unsophisticated, but top engine builders view this as a key preventative maintenance task. Valve lash, which is the clearance between the tip of the rocker arm and valve stem tip, is a delicate balancing act between durability and maximum power.

When to set the Lash on the intake valve?

The best sequence to use when setting valve lash is to go by the firing order. This requires less turning of the crankshaft and will help ensure that valve overlap is not an issue. EO/IC rule (Exhaust Opening and Intake Closing). Set the intake valve lash when the exhaust valve is beginning to open.

Can you adjust the Lash on an exhaust valve?

Now the exhaust valve can be adjusted. When all of the intake and exhaust valves have been set with the proper lash, it is common for all the top engine builders to perform a double check by rotating the engine and checking each valve again, starting from the first cylinder in the firing order.

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.