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Old 08-30-2012, 08:45 PM #1
jojo750
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dm8 help

ok. i need some help with a dm8 that im trying to get fixed for a friend.
when i air it up, the bolt just flutters back and forth.
so i remove the lpr, replace the 007ur90 oring inside the lpr.
air it up again, the bolt does the same thing. so i check the shim stack (against the pic in the manual), and the shims are backwards (didnt have the larger shims against the piston). so i reverse the order of the shims. air it up again, and its still doing the "fluttering".
now im at a loss, because i cant think next what to check.

any ideas?
stock bolt
stock settings (dwell 20, lpr 3, hpr might be low)

thanks for any help.
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Old 08-30-2012, 09:15 PM #2
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Quote:
Originally Posted by jojo750 View Post
ok. i need some help with a dm8 that im trying to get fixed for a friend.
when i air it up, the bolt just flutters back and forth.
so i remove the lpr, replace the 007ur90 oring inside the lpr.
air it up again, the bolt does the same thing. so i check the shim stack (against the pic in the manual), and the shims are backwards (didnt have the larger shims against the piston). so i reverse the order of the shims. air it up again, and its still doing the "fluttering".
now im at a loss, because i cant think next what to check.

any ideas?
stock bolt
stock settings (dwell 20, lpr 3, hpr might be low)

thanks for any help.
define fluttering.
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Old 08-30-2012, 09:17 PM #3
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Guess its hard to describe better. But the bolt is going back and forth very fast. Without me pulling the trigger at all.
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Old 08-30-2012, 09:18 PM #4
grss429
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Originally Posted by jojo750 View Post
Guess its hard to describe better. But the bolt is going back and forth very fast. Without me pulling the trigger at all.
Ah gotcha, stock settings are 18 dwell, 3 1/2 turns LPR, btw, but it wont fix your problem this sometimes happens if your HPR pressure is to high, and check your tophat, and make sure the blue 014 oring is in there

are we talking LPR shim stack or HPR
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Old 08-31-2012, 04:33 PM #5
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Lpr shims were backwards. Haven't taken hyper3 apart yet.
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Old 09-01-2012, 05:42 PM #6
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Fixed.
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