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erst vernier pulley idiot proof ?

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Old Feb 20, 2010 | 02:55 PM
  #1  
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muttsnutts89
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From: somerset
Default erst vernier pulley idiot proof ?

hi, ive got a kent cvh 35 in my erst with a vernier pulley, at the mo its set at 0deg using standard timing marks, it says max inlet lift at 118deg, so basicly i need to use a dial gauge in no 1 piston, and dial guage on no 1 inlet valve retainer find full lift on no. 1 inlet valve. take belt off. with a pointer on the crank and go to tdc. undo vernier bolts then wind clockwise 118 deg past tdc mark and refit belt, tighten bolts on verner and tension, then it should be set ? the only reason why i ask is ther vernier is nearly on its end stops when i do this. wil it hit valves if its too far one way or another ? ie you can move it about anywhere on the vernier and it wont do any damage ?. heres the setting below, hope some 1 can shed some light. thanks guys.
SPORTS ʻRʼ 2000-7000 .275ʼʼ .267” .453ʼʼ.440” 276o 20/76 76/20 118o .000ʼʼ .029” N/A CF28

Last edited by muttsnutts89; Feb 20, 2010 at 03:02 PM.
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Old Feb 20, 2010 | 04:53 PM
  #2  
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tabetha
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Yes it can do damage, if moved too far and valve and piston have a fight.
You would be best off using a dial gauge to find the true TDC, this will be the centre of the each way sway, that exists before the needle starts to move again, typically a span of 4-6 degrees, so find the true centre, do this also on the cam LOBE not retainer, centre again as above, then fit degree disc, on crank turn crank to 118 degrees after tdc, with the full valve lift dial still in centre.
It will help if you have a nut welded to the cam(thrust) locking plate if you can, simple then to just wind a bolt in to touch the cam at an angle to hold in position while you fit pulleys etc, tension belt before fully tightening vernier clamps.
tabetha
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Old Feb 21, 2010 | 05:12 PM
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muttsnutts89
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thanks tabetha ok just to confirm that, what your saying is i need to remove the hydraulic lifter on no1 inlet valve and find full lift on cam lobe, when it says full lift i assume that is valve at full lift when OPEN ? or is that full lift when its sat on its seat ?. if i put a dail guage on the cam lobe the lobe will be pointing down opening the valve ? and wont be able to find full lift ? think this is where im going wrong.
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Old Feb 22, 2010 | 06:42 PM
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tabetha
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Forget about full lift of the valve, this is set mechanically by the cam/rocker pivot points and cam lobe profile, use the highest lift taken from the cam lobe.
tabetha
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