Frank,
If your mechanic is talking about the setting be different with a performance
cam he is correct. The clearance is determined by the cam grind ( location /
size of the ramps on the cam) and valve train geometry (ratio). The ramps
"smoothly" transition the valve onto and off of the cam. If the clearance is
too great you will miss the ramps and this will destroy the cam or break
valves. IMHO If you have valve noise and the head has been rebuilt correctly,
the first place I would check is the rocker arm and shafts.
SpearsEng@aol.com wrote:
> Just got my 1600 back from the shop installing a new head. The question I
> have is the manual shows valve clearance at 0.43 mm (0.0169 in), however the
> guy I have working on it says that this is too loose and you can hear a
> couple of the valves tapping. So what should the setting valve clearance be
> for performance (he says that on a lot of vehicles this is usually a
> different setting than the factory setting)
>
> Any thoughts on this ??
>
> J. Frank Spears
> 69 1600
> Auburn, WA
--
Philip Erickson Phone: (619) 622-7963
Associate Scientist
Medicinal Chemistry FAX: (619) 678-8277
Agouron Pharmaceuticals, Inc.
4215 Sorrento Valley Boulevard San Diego, CA 92121
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
|