Roller Rocker Adjustment
09-01-2009, 09:28 PM
#1
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: Iowa
Posts: 474
Roller Rocker Adjustment
Allright lets get this taken care of here...Why can i not figure out how to properly adjust my rollers?????? I know when on the valve openings and closings to adjust them, but i dont understand this crap i hear about 20' lbs of torque???? Heres the way i have it, see where i go wrong...first get it to zero lash, then turn the 5/8in nut to between 1/4 to 1/2 past zero lash, then set allen headed lock screw??? It just seems that after i do this the rocker feels a little loose...am i crazy or did i do something wrong? Boy it would sure help if someone do a sticky on this....Jamie
09-01-2009, 09:37 PM
#2
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
hydraulic lifters will compress since no hydraulic pressure is present when you first set them, don't worry if they feel loose after setting them properly, upon start up hydraulic pressure will pump them up accordingly.
09-01-2009, 09:39 PM
#3
D.R. THE PATHETIC DORK
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
from FTI
Valve Adjustment Procedure >Top
Hydraulic Lifter/Valve Adjustment
1. Remove the valve covers, and pick a cylinder you are going to set the pre-load on. Only do one cylinder at a time.
2. Rotate the engine in its normal direction of rotation (clockwise) and watch the exhaust valve on that particular cylinder. When the exhaust valve begins to open, stop and adjust that cylinder's intake rocker arm.
3. To adjust, back off the intake rocker arm adjusting nut and remove any tension from the push rod. Wait a minute or two for that hydraulic lifter to return to a neutral position. The spring inside the lifter will move the push rod seat up against the retaining lock, if you give it time to do so.
4. Twist the intake push rod with your fingers while tightening down the rocker arm. When you feel a slight resistance to the turning of the push rod, you are at "Zero Lash". Turn the adjusting nut down one half to three-quarters of a turn from that point for street applications. Use 1/8 to 1/4 turn for race applications. Lock the adjuster into position. The intake is now adjusted properly.
5. Continue to turn the engine, watching that same intake valve/rocker you just set. It will go to full open and then begin to close. When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. Loosen the exhaust rocker arm and follow the same procedure described before in steps 3 and 4 to adjust this rocker arm.
6. Both valves on this cylinder are now adjusted, and you can move on to your next cylinder and follow the same procedure again.
There may be some initial valvetrain noise when the engine is first fired up but once oil pressure has stabilized and the engine heats up, it should quiet right down to a normal level.
Remember that some racier camshafts will have a mechanical sound to them and will not be a silent as factory units.
Valve Adjustment Procedure >Top
Hydraulic Lifter/Valve Adjustment
1. Remove the valve covers, and pick a cylinder you are going to set the pre-load on. Only do one cylinder at a time.
2. Rotate the engine in its normal direction of rotation (clockwise) and watch the exhaust valve on that particular cylinder. When the exhaust valve begins to open, stop and adjust that cylinder's intake rocker arm.
3. To adjust, back off the intake rocker arm adjusting nut and remove any tension from the push rod. Wait a minute or two for that hydraulic lifter to return to a neutral position. The spring inside the lifter will move the push rod seat up against the retaining lock, if you give it time to do so.
4. Twist the intake push rod with your fingers while tightening down the rocker arm. When you feel a slight resistance to the turning of the push rod, you are at "Zero Lash". Turn the adjusting nut down one half to three-quarters of a turn from that point for street applications. Use 1/8 to 1/4 turn for race applications. Lock the adjuster into position. The intake is now adjusted properly.
5. Continue to turn the engine, watching that same intake valve/rocker you just set. It will go to full open and then begin to close. When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. Loosen the exhaust rocker arm and follow the same procedure described before in steps 3 and 4 to adjust this rocker arm.
6. Both valves on this cylinder are now adjusted, and you can move on to your next cylinder and follow the same procedure again.
There may be some initial valvetrain noise when the engine is first fired up but once oil pressure has stabilized and the engine heats up, it should quiet right down to a normal level.
Remember that some racier camshafts will have a mechanical sound to them and will not be a silent as factory units.
09-01-2009, 09:55 PM
#6
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: Iowa
Posts: 474
09-01-2009, 10:08 PM
#7
Banned
Join Date: Dec 2005
Location: Lil' Rhody
Posts: 22,376
you dont shim stud mount rockers... and you (just you, not everyone) should ignore anything you hear about "pedestal" mount rockers... i can see you are confused.
set your rockers to 1/2-5/8 of a turn instead of 1/4-1/2. they will feel slightly loose after you are done. but they should be pretty quiet after you run the motor for about 5 minutes.
make sure you prime the engine very well and turn it over by hand a few times before you start it
set your rockers to 1/2-5/8 of a turn instead of 1/4-1/2. they will feel slightly loose after you are done. but they should be pretty quiet after you run the motor for about 5 minutes.
make sure you prime the engine very well and turn it over by hand a few times before you start it
09-01-2009, 10:13 PM
#9
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: Iowa
Posts: 474
you dont shim stud mount rockers... and you (just you, not everyone) should ignore anything you hear about "pedestal" mount rockers... i can see you are confused.
set your rockers to 1/2-5/8 of a turn instead of 1/4-1/2. they will feel slightly loose after you are done. but they should be pretty quiet after you run the motor for about 5 minutes.
make sure you prime the engine very well and turn it over by hand a few times before you start it
set your rockers to 1/2-5/8 of a turn instead of 1/4-1/2. they will feel slightly loose after you are done. but they should be pretty quiet after you run the motor for about 5 minutes.
make sure you prime the engine very well and turn it over by hand a few times before you start it
09-01-2009, 10:15 PM
#10
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: Iowa
Posts: 474
Ive got poly locks....well between my and kyle, both of us are having trouble getting them set....maybe im just making it out to be more difficult than it really is