Car Soiunds like a diesel?
- Thread starter Guero
- Start date
fork5o
New Member
my truck was kinda doin that???? not sure if its the same, but i had to adjust the rockers to get rid of the tap.
parchisi
New Member
My engine makes noise kinda like a diesel, but it could be from the solid lifters, the rockers, or both.
Black95GTS
Active Member
Where does it sound like a diesel? Can you be more specific?
Did you hit the distributor by mistake and FUBAR your timing? Sounds silly but its easy enough to do.
Aftermarket rockers are definately more noisy.
I've always done only a quarter turn past 0 lash.
Adam
Did you hit the distributor by mistake and FUBAR your timing? Sounds silly but its easy enough to do.
Aftermarket rockers are definately more noisy.
I've always done only a quarter turn past 0 lash.
Adam
1994Vib.RedGT
Member
The pushrod hitting the valve cover sounds like hitting a hollow tin can with a drumstick, i know that sound all too well
Dan95-5.0
Active Member
what style heads are they? pedestal or stud mount rockers?
if pedestal, watch the exhaust valve open and close, then the intake will open and close. as soon as the intake closes, tighten down the rocker till zero lash (slight drag on pushrod) and see how much of a turn it takes when torqing it. 1/4 to 1 is what your looking for
if pedestal, watch the exhaust valve open and close, then the intake will open and close. as soon as the intake closes, tighten down the rocker till zero lash (slight drag on pushrod) and see how much of a turn it takes when torqing it. 1/4 to 1 is what your looking for
OrangeMustangGt
Founding Member
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
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
OrangeMustangGt
Founding Member
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