So what am I to expect from the out of spec cam bearing clearances?
I estimate, with plastigauge, that they are exhaust .18mm (l)
and .13mm (r), intake .08mm (l)and .15mm (r).
--- In
DSN_klr650@yahoogroups.com, "pete88chester"
wrote:
>
> I replyed to this Post, but forgot to change it so it went to the
> List. What I basically said was that if the 0.2mm play he is
talking
> about is the clearance between the camshaft bearing journal & the
cam
> bearing bore then he has trouble. The 0.2 mm (0.0079") is 0.05mm
> (0.002") over the service limit of 0.15mm (0.0059") (the max
> clearance between the cam & the cam bearing. The new bores will
wear
> in a little & be looser. I asked if he had sent the camshaft with
> the head to Engine Dynamics so they could properly bore the cam
> bearing holes to the correct clearances. It may be that the job
> needs to be redone. Also it looks like the holes were mashined so
> they are a little too close in the direction of the valves. A way
to
> fix this (if the holes are not redone correctly or if there isn't
a
> bearing clerance problem) would be to first measure the clearance
at
> each valve to see which are too close to the cam lobes & record
the
> measurements. Then remove the valves that are too close & bring
them
> to someone with a good valve mashine & have them dressed off
enough
> to where when assembled, they are mid way in the range covered by
the
> shims. That's a quick & dirty reply, I hope it make sence. It
was a
> thing you sometimes had to do to the old overhead cam engines when
> the seats were cut too deep in the head. It also was the way you
> adjusted the old flathead engines with solid unadjustable
lifters.
> Just kept triming the valve stem till you got the proper
clearance.
wrote:
> >
> > I find myself in need of a 1.9mm valve shim. Do any of the non-
> > Kawasaki 29mm diameter shims, already tried BMW cars, come in
this
> > size?
> >
> > (I recently had my cam bearings welded and bored by Engine
Dynamics
> > in Petaluma CA and the cams are now off a bit.)
> >
> > Also, there is now a bit of play, .2mm, in the cam. Did others
who
> > sent their heads here have a similar experience? How have they
> > performed since? In retrospect, some of the questions that were
> > asked on this board regarding this repair, ie "computer mapping
of
> > the cams" make
> > sense.
Open fire.. but be warned I may unload a few mags myself in return
fire.