Ive heard theres a bunch of ways to do it but I want to know what you think.on a 75 chevy truck (350) would you snug them down and then start it then loosen til they rattle or tighten them down and loosen? how would you do it? its just for the one side.
2007-02-01 12:47:59 · 8 answers · asked by wheels47012 3 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Here is the ONLY way I will adjust Chevy hydraulic lifters. Sure beats the hell out of doing it when the engine is running by a long shot. Bring the number one cylinder to TDC. You'll know that by the timing mark being on or near zero and if you stick a screwdriver in that spark plug hole the piston will be all the way up. Loosen the rocker arm stud on both valves and then tighten one up while slowly turning the pushrod with your fingertips. When the pushrod can't be turned then stop and adjust the nut down 1/4 to 1/3 turn more. Then do the other one on number one cylinder. Now here's why this is so easy...you can adjust more valves without turning the engine over while the motor is in the number one position. Here's the sequence...you can adjust the exhaust valves on cylinders 1,3,4, and 8. Then you can adjust the intake valves on 1,2,5, and 7. All done the same way by turning the pushrod...etc etc. Rotate the engine one full turn or 180 degrees coming back to the zero timing mark. Now number 6 cylinder is up in firing position. Adjusting the rest of the valves in this order....exhaust on 2,5,6, and 7...then the intake on 3,4,6,and 8. Once the valves are set like this just button the engine up and if you did it right they will not need touched again. I've done many, many small blocks this way and 4 and 6 bangers as well. Not once have I had to go back and do it again. Sure beats the hell out of doing it with the motor running spraying oil all over the engine bay.
2007-02-02 05:32:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Big Block Chevy Valve Adjustment
2016-12-30 06:52:55 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Do one cylinder at a time, roll engine over till the piston is at top dead center, both valves will be closed, both lifters will be on the cam base meaning there is no lift from the lobe. Adjust the rocker arm till there is zero clearance. The tighten down an additional 3/4 turn. Move to the next one.
2007-02-01 14:28:52 · answer #3 · answered by parkmistyred 4 · 1⤊ 0⤋
I always set each valve on the base circle of the lobe. For a hyd cam, I turn the pushrod in my fingers as I slowly tighten the jam nut. When I can't turn the pushrod easily, thats 0 lash. Then I turn the jam nut another 1/2 turn. Then I bump the motor over and set the next valve. I do this procedure if the engine has been taken apart and the valve settings can't be trusted. I find it works on funtional engines too, and it doesn't make an oily mess.
2007-02-01 13:32:08 · answer #4 · answered by electron670 3 · 1⤊ 0⤋
If you have hydraulic lifters do the following. With one valve cover off engine running slowly back off counter clockwise one rocker arm until you here a clicking sound. At point slowly turn the nut clockwise till the clicking sound stops. Slowly turn the nut on down 1/4 of one turn. Do the same to every rocker arm / lifter. If you still hear an unusual clatter, add a plastic can of Rislone to your motor oil if it's a quart low. If not do it at your next oil change.
2007-02-01 14:01:35 · answer #5 · answered by Country Boy 7 · 2⤊ 0⤋
It is a measured thing. You need a "feeler strip guage". And check the owners manual or a repair manual for that engine to see how much space there is suppose to be. Do it cold. The manual will tell you that. Do it right or 1) you burn out valves or 2) you will lose horsepower.
2007-02-01 12:54:30 · answer #6 · answered by ButwhatdoIno? 6 · 0⤊ 6⤋
Leave 'em loose enough so that ya don't throw a rod. Tighten them down til they pump oil and the noise stops. Back 'em off a 1/2 toun and you will be fine.
2007-02-01 12:54:40 · answer #7 · answered by Anonymous · 0⤊ 4⤋
Hope this helps!
2015-05-02 09:48:07 · answer #8 · answered by Anonymous · 0⤊ 0⤋