exhaust cam not spinning.
06-22-2011, 05:21 PM
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exhaust cam not spinning.
okay guys I built a gsr. With supertech valvetrain aftermarket cams and cam gears. when i set timing at 0 its all good. when I try to turn the crank (motor is still on a stand) the intake cam moves and the exhast moves some but after a bit the exhaust cam stops and when I apply moe force to the crank the intake spins and the belt jumps teeth on the exhaust cam because it didn't move. I'm so confused. It's a gsr head. What can it be?
06-22-2011, 05:36 PM
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06-22-2011, 07:34 PM
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Re: exhaust cam not spinning.
did u check ur measurements...im doin mines on the same cams and v2v is tight i think they need like 3 degrees seperation to get around .030 v2v..at 0-0 i got like .026
06-22-2011, 09:23 PM
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Re: exhaust cam not spinning.
no. I just set everything at 0 and drive it slow to tune it. My tuner said itll be good at 0 0 for now until the tune. I don't know how to degree cams and all that. What is your intake and exhaust set at?
your valves may have a hit on them with that approach...
06-23-2011, 03:47 AM
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Re: exhaust cam not spinning.
If you still have the engine on a stand get your helms manual out or google how to lock vtec using air pressure. Once you get vtec locked in using the air with the valve cover off, so you can see that the rockers are locked, rotate the crank over slowly and gently. Once it spins 360 degrees then you know you have plenty of clearance. Its good to advance and retard the cams while doing this so you know everything will clear while making tuning adjustments on the dyno. (Which is where you should be tuning)
Last edited by Disco; 06-23-2011 at 04:17 AM.
06-23-2011, 12:34 PM
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Re: exhaust cam not spinning.
If you still have the engine on a stand get your helms manual out or google how to lock vtec using air pressure. Once you get vtec locked in using the air with the valve cover off, so you can see that the rockers are locked, rotate the crank over slowly and gently. Once it spins 360 degrees then you know you have plenty of clearance. Its good to advance and retard the cams while doing this so you know everything will clear while making tuning adjustments on the dyno. (Which is where you should be tuning)
and the engine is still on a stand
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