ICEO, need the steps [Archive] - Chevelle Tech

: ICEO, need the steps


Anthony
Nov 19th, 04, 6:53 PM
ill end up getting help from a freind doing this but can someone give me the ICEO method of setting lash for a solid cam in detail please? i tried to find it in search but had no luck.
thanks

Motor Martyr
Nov 19th, 04, 7:36 PM
EOIC as the exhaust starts to open adjust the intake, and as the intake just barely closes adjust the exhuast.

JIM
Nov 19th, 04, 8:19 PM
I know Brian knows how it is done, but be careful interpretting that second part. When the intake valve has gone through it complete opening, starts to close and it almost completely closed, then adjust the exhaust valve. Adjusting the intake is straight forward like he said; as soon as you see the exhaust lifter start to rise, adjust the intake.

.....your search would have worked if you typed EOIC instead of ICEO. Just letting you know for future reference

Anthony
Nov 19th, 04, 9:33 PM
thanks for the help, do i do this in the fire order or side by side as in 1357 and 2468?

MY FYN 79
Nov 19th, 04, 10:36 PM
Courtesy of Crane Cams:

Setting Valve Lash on Mechanical Cams

All the valves must be set individually and only when the lifter is properly located on the base circle of the lobe. At this position the valve is closed and there is no lift taking place. How will you know when the valve you are adjusting is in the proper position with the lifter on the base circle of the cam? This can be accomplished by watching the movement of the valves.

When the engine is hot (at operating temperature) remove the valve covers and pick the cylinder you are going to adjust.

Hand turn the engine in its normal direction of rotation while watching the exhaust valve on that particular cylinder. When the exhaust valve begins to open, stop and adjust that cylinder’s intake valve. (Why? Because when the exhaust is just beginning to open, the intake lifter will be on the base circle of the lobe, so the intake is the one we can now adjust.)

Use a feeler gauge, set to the correct valve lash, and place it between the tip of the valve stem and rocker arm. Adjust until you arrive at the proper setting and lock the adjuster in place.

After the intake valve has been adjusted, continue to rotate the engine, watching that same intake valve. The intake valve will go to full lift and then begin to close. When the intake is almost closed, stop and adjust the exhaust valve on that particular cylinder. (Again, when we see the intake valve almost closed, we are sure that the exhaust lifter is on the base circle of the lobe.) Use the feeler gauge and follow the procedure described before in step 3.

Both valves on this cylinder are now adjusted, so move to your next cylinder and follow the same procedure again. In the future you may find shortcuts to this method, but it still remains the best way to do the job correctly.

greg_moreira
Nov 20th, 04, 2:54 AM
You can do it any way you want. The most convenient way is to just follow the firing order I think(18436572) because it wont take much rotating of the motor to get the valves in the following cylinder oriented right as opposed to going through one complete bank at a time. There are other shortcuts that can make the job faster too, but this is more thorough and accurate than the shortcut methods, otherwise they would not be shortcuts so Id stick with the EOIC method.