How to set valve lash clearances on a portable gas generator?

How to set valve lash clearances on a portable gas generator?

This video will show you how to set the Valve Lash Clearance settings on a Portable Gas Generator. With step by step instructions on how to prepare, set the engine and measure the clearances. If you need Valve clearance settings please look up the Valves for your generator on our website.

What does a lash do on a pushrod engine?

Valve lash is the mechanical clearance in the valvetrain from the valve tip to the rocker in a pushrod engine using solid lifters.

How do you adjust a 235 / 261 valve?

NOTE: If your 235/261 is equipped with hydraulic lifters, the adjustment procedure is the same, except you carefully adjust each valve to zero lash when it is in position, then give the adjusting screw 1/4 turn more and lock the nut.

What’s the best way to adjust a valve?

It is very easy to dent in the sides, and that will cause oil leaks later. Get a bit of scrap 2 X 4 or 4 X 6 and lay it along the side of the cover and whap that wood with your mallet to knock the cover loose, if your wood is as long as the cover is you can hit it pretty hard and not bend it. Once it’s free, lay it aside.

What causes valve lash?

What is a cause for concern is if you notice the valve lash opening up. The most common reason for this is a failure of the needle bearings in a roller lifter or a wiped cam lobe. “Wiping” a cam is when a lack of lubrication or some other problem causes the crown of the lobe of the cam to be ground away.

Why is valve lash necessary?

Valve lash is intended to provide the greatest amount of valve opening on the high point of the camshaft lobe and assure that the valve is tightly closed on the low segment of the camshaft lobe. Valve lash adjustment is necessary maintenance for engines without hydraulic valve lifters.

What is a valve lash or valve recession check?

Valve lash is the mechanical clearance in the valve train between camshaft and valve in an internal combustion engine. Valve lash is usually about 10/1,000 of an inch depending on the engine specifications. Valve lash is intended to provide the greatest amount of valve opening on the high point of the camshaft lobe and assure that the valve is tightly closed on the low segment of the camshaft lobe.

What are hydraulic lash adjusters?

The hydraulic lash adjusters are designed to keep the lash between the rocker arm and the valve at a constant rate, and also eliminate almost all periodical adjustment of the valve lash.