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Discussion Starter · #1 ·
never installed roller rockers but i found this old thread is this accurate an will be no problem ?i have scorpian 1.7 roller rockers with adjustable nuts this is a 4-550 hp car suypercharged aluminum headed...
) Install all 16, and snug down the nuts by hand.

2) Rotate the engine until the balancer reads TDC on the compression stroke.

3) Check the rotor in the distributor, and verify that it is pointing at the #1 wire on the cap. If it's not, rotate the engine 360 degrees.

4) To find the point of zero lash, spin the pushrod between your thumb and forefinger while slowly tightening the nut with a 1/4" drive ratchet. Tighten the following rockers until you feel the first bit of drag on the spinning pushrod:
Cylinder #1 intake and exhaust,
Cylinder #3 exhaust,
Cylinder #4 intake,
Cylinder #7 exhaust,
Cylinder #8 intake.

5) Now tighten each of those 3/4 of a turn, and lock them.

6) Rotate the engine 360 degrees, so the balancer reads TDC again.

7) With a 1/4" ratchet, tighten these rockers (again, to zero lash):
Cylinder #3 intake,
Cylinder #2 exhaust,
Cylinder #7 intake,
Cylinder #6 exhaust.

8) Now tighten each of those 3/4 of a turn, and lock them.

9) Rotate the engine 90 degrees, and with the ratchet, tighten to zero lash on these rockers:
Cylinder #2 intake
Cylinder #4 exhaust
Cylinder #5 intake and exhaust
Cylinder #6 intake
Cylinder #8 exhaust

10) Now tighten each of those 3/4 of a turn, and lock them.



any other tips would be really appreciated thanks!
 

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I go 1/2 turn.

I like to do each cylinder individually. Set all the rockers on and turn the nuts on until they're barely on the rockers. Rotate the crank by hand. When the exhaust valve just starts to open set the intake valve. When the intake is almost closed set the exhaust valve.

Takes a little longer doing it that way but there's no way to mess it up. Trying to find a lot of valves that conveniently are all on the base circle of the cam at once is a little less of a sure shot, though it may work fine.
 

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Discussion Starter · #4 ·
I go 1/2 turn.

I like to do each cylinder individually. Set all the rockers on and turn the nuts on until they're barely on the rockers. Rotate the crank by hand. When the exhaust valve just starts to open set the intake valve. When the intake is almost closed set the exhaust valve.

Takes a little longer doing it that way but there's no way to mess it up. Trying to find a lot of valves that conveniently are all on the base circle of the cam at once is a little less of a sure shot, though it may work fine.

when do i know when the valve is opening an closing an which ones which...my buddy told my i would need a filler gauge an to know some clearence???.
 
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