[Vwdiesel] large abrasive sheets

[James Hansen]

No, just leave a small gap between sheets rather than try to get them so
close they overlap and leave a high spot.  Technique when lapping prevents
the gap from being a factor.(large circular movements, with plenty of extra
room to move the part around so no one spot is ever over the small gap)
Works well when used with large dosage of patience. Use plenty of water to
float away cuttings which keeps the abrasive sharp and cutting well.  A good
3m spray adhesive is waterproof... but be sure to get even coat applied or
it causes un-eveness in the paper as well.  I've never been able to find
large sheets of fine wet sanding paper.  Large sheets of coarse are easily
found, but no 4-600 grit wet that I can find, at least here.

Expect some difficulty when you have a head surface to do that has the hard
inserts present- the aluminum is much softer, and the head will tend to cut
away and leave a high spot around the precup inserts if you have much
material to remove.- the inserts are all in a line- the head would rock
along that line a tad if you aren't careful to not let that happen.  It's
doable, but tedious.  No replacement for a good machine shop really, but hey
I kew a guy that flat filed a head that had a bad warp (.020")  with a
common mill bastard file... and got away with it.  For me, that would have
blown the expansion tank across the shop first time the motor ran.
-James

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]On
Behalf Of Libbybapa at wmconnect.com
Sent: Monday, February 07, 2005 11:09 PM
To: val at swamps.roc.ny.us; vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] large abrasive sheets


I thought about doing that.  Do the seams cause any trouble?
Andrew
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