I have used Koppercoat, on the L16 in my old PL521, w/great success. I think
that it
probably remains flexible enough to allow for the differential expansion.
Gary McCormick
San Jose, CA
------------------------------------------------------------------------------------------
nruff wrote:
> > That is a statement of fact (or opinion) but does not answer the question.
> Why is Koppercote
> > (or any other gasket sealant) a bad idea (or at least not recommended)
> when installing a U20
> > head?
> >
> I think I can answer that as I debated awhile before doing it myself. As
> the motor heats and cools during operation, the cast block and aluminum
> head expand and contract (ever so slightly) at a different rate. By using a
> "dry" gasket you allow the head and block to move independently (again, ever
> so slightly) as they heat and cool. I opted to Koppercoat, as recommended
> by quite a few other owners, as I had oil getting into the coolant supply.
> I had already taken the head off once, with the same results. I checked
> everything possible, short of pressure testing the block, which the machine
> shop had done previously. Guess what--Koppercoat the gasket and problem
> instanly solved. Even if it wasn't the "perfect" solution, it worked.
>
> BTW, thanks for the replys regarding the oil weights. I forgot to ask this
> earlier-I thought I read somewhere that non-detergent was good for break-in.
> Any thoughts? Seems like the only place I can find it is at the local
> Tractor Supply-really cheap, no name stuff.
>
> Thanks again!
> Nathan
>
> >
> >
> >
> > Ben Zech wrote:
> >
> > > Headgasket is put on with out sealant.
> > >
> > > >From: Gary McCormick <svgkm@halley.ca.essd.northgrum.com>
> > > >Reply-To: Gary McCormick <svgkm@halley.ca.essd.northgrum.com>
> > > >To: Mike Kerr <mikekerr@innercite.com>
> > > >CC: nruff <nruffcorn@prodigy.net>, datsun list
> > > ><datsun-roadsters@autox.team.net>
> > > >Subject: Re: How Heavy?
> > > >Date: Wed, 05 Jan 2000 14:09:51 -0800
> > > >
> > > >and that is because... ?
> > > >
> > > >Gary McCormick
> > > >San Jose, CA
> > > >
> > >
> >---------------------------------------------------------------------------
> ---------------
> > > >
> > > >Mike Kerr wrote:
> > > >
> > > > > After putting the new head gasket on the 2L and sealing it with
> > > >Koppercoat
> > > > >
> > > > > not the best idea...
> > > > >
> > > > > Mike Kerr
> > > > > Roadster Restoration
> > > > > 3730 Todrob LN.
> > > > > Placerville CA. 95667
> > > > > Ph.# 530-644-6777
> > > > > Fax# 530-644-7252
> > > > > E-mail: mikekerr@innercite.com
> > > > > Web page : http://www.innercite.com/~wolfgang
> > > > > Visa & master card
> > > > > -----Original Message-----
> > > > > From: nruff <nruffcorn@prodigy.net>
> > > > > To: datsun list <datsun-roadsters@autox.team.net>
> > > > > Date: Monday, January 03, 2000 7:38 PM
> > > > > Subject: How Heavy?
> > > > >
> > > > > >Hey all-
> > > > > >
> > > > > >After putting the new head gasket on the 2L and sealing it with
> > > >Koppercoat,
> > > > > >thankfully the oil that was getting into the coolant has ceased! I
> > > >have
> > > > > >several hours on the rebuilt motor, most of which have been spent
> > > >inside
> > > > > the
> > > > > >garage (sigh) instead of outside as there is no exhaust yet. There
> > > >have
> > > > > >been a few "fun runs" around the block but that generally draws
> > > >unwanted
> > > > > >attention from a particular neighbor on the corner (you know the
> type
> > > ><g>.)
> > > > > >
> > > > > >Well, so far, I've changed the oil once, having started it out with
> > > >10W-30,
> > > > > >and switching to 5W-30 after the last oil/filter change. What
> are
> > > >the
> > > > > >rest of you running? I'm not that up on oils, but with the limited
> use
> > > >(I
> > > > > >run it every other weekend) and the colder weather of the mid-west
> > > >winters,
> > > > > >I chose a lighter weight oil to get quicker oiling on start-up.
> What
> > > > > >approaches have the rest of you taken?
> > > > > >
> > > > > >I recently started running synthetic in my daily driver 94 MX-6 to
> > > >quiet
> > > > > >down noisy the HVLA's and it's working OK, just kind of hard to
> swallow
> > > >the
> > > > > >$4+ /quart. Anyone running full or partial synthetic in their
> > > >roadster?
> > > > > >
> > > > > >I for sure don't want to start a Brand Name war! We all know how
> far
> > > >that
> > > > > >would get us! Instead I just want to better determine the options
> for
> > > >what
> > > > > >weights and blends are best suited for the rigors or the 1600 and
> 2000
> > > > > >engine. Hopefully this is both interesting and enlightening. ;-)
> > > > > >
> > > > > >Looking forward to your responses.
> > > > > >Nathan
> > > >
> > >
> > > ______________________________________________________
> > > Get Your Private, Free Email at http://www.hotmail.com
> >
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