Valve Adjustment The Quick Way:

[grumpyvette]

Valve Adjustment The Quick Way:

Ok, now to the good stuff! First, view this little chart for Small and Big Block Chevy Engines that I made and see if you can understand it ... for other engines, use your firing order that matches your engine to do the same. You set up this procedure based upon "opposite" cylinders of your firing order. (see below)

 

Intake Valve Adjustment: ENGINE OFF!

 

with #1 cylinder Intake Valve at full valve lift .... Adjust #6 Intake Valve

with #8 cylinder Intake Valve at full valve lift .... Adjust #5 Intake Valve

with #4 cylinder Intake Valve at full valve lift .... Adjust #7 Intake Valve

with #3 cylinder Intake Valve at full valve lift .... Adjust #2 Intake Valve

with #6 cylinder Intake Valve at full valve lift .... Adjust #1 Intake Valve

with #5 cylinder Intake Valve at full valve lift .... Adjust #8 Intake Valve

with #7 cylinder Intake Valve at full valve lift .... Adjust #4 Intake Valve

with #2 cylinder Intake Valve at full valve lift .... Adjust #3 Intake Valve

 

Exhaust Valve Adjustment: ENGINE OFF!

 

If you have noticed, this is the same procedure as the intake valves listed above, just that you are now adjusting the exhaust valves the same way.

 

with #1 cylinder Exhaust Valve at full valve lift .... Adjust #6 Exhaust Valve

with #8 cylinder Exhaust Valve at full valve lift .... Adjust #5 Exhaust Valve

with #4 cylinder Exhaust Valve at full valve lift .... Adjust #7 Exhaust Valve

with #3 cylinder Exhaust Valve at full valve lift .... Adjust #2 Exhaust Valve

with #6 cylinder Exhaust Valve at full valve lift .... Adjust #1 Exhaust Valve

with #5 cylinder Exhaust Valve at full valve lift .... Adjust #8 Exhaust Valve

with #7 cylinder Exhaust Valve at full valve lift .... Adjust #4 Exhaust Valve

with #2 cylinder Exhaust Valve at full valve lift .... Adjust #3 Exhaust Valve

 

Need an explanation?

 

Well, what you have here is "opposite" valves on the engine cycle. The small and big block Chevy engines use a firing order of 1-8-4-3-6-5-7-2. What you do is separate the order into the two sides of the firing order. These are "exact" opposites that put the opposing valve at the correct location for adjustment, meaning the back side (base circle, or heal) of the cam lobe (see image at left). This procedure works on most V8 and V6 engines. (base circle, or heal) of the cam lobe (see image at left). This procedure works on most V8 and V6 engines. (base circle, or heal) of the cam lobe (see image at left). This procedure works on most V8 and V6 engines.

 

1 - 6

 

8 - 5

 

4 - 7

 

3 - 2

 

If the lifter is anywhere other than on the heal of the cam where there is NO ramp contact you will have incorrect lash. The chart above makes sure you are on the backside of the cam lobe. When the cylinder is at TDC, this is not often the correct location to get the proper lash setting.

 

http://www.centuryperformance.com/valveadjustment.htm#Engine%20

[DavyZ]

Thanks for the info and for the link, Grumpy! It will sure come in handy in the near future--learned a few things too

 

Davy