More to the point, I have been advised by a radiator guy never to use
silicone anywhere on an engine as it does what Tom described; break off in
the engine and clog passages and radiators. Better to use non hardening Form
A Gasket and only a little.
I use wheel bearing grease.
Mike
----- Original Message -----
From: "Thomas Walter" <twalter@austin.rr.com>
To: "The Belgian Roadster" <chriss@euregio.net>
Cc: <datsun-roadsters@autox.team.net>
Sent: Sunday, May 27, 2001 10:54 AM
Subject: Re: oil filter gasket
> Chris,
>
> Either gasket should work fine. Given the high
> pressure of the oil when cold, I would use the
> thinner gasket. Check the surface of the block
> and oil filter mount for flatness first.
>
> This is one place NOT TO USE RTV silicone
> sealer. I will spray the gasket with a light
> coating of gasket sealer, but that is it.
> I have torn done a few engines that had oil
> starved camshafts to find a piece of silicone
> bead that had squeezed out of a gasket, into
> an internal passage. Most amazing was one
> engine that had ran 40,000 miles before the
> silicone broke loose, plugging the oil passage
> in the cylinder head.
>
> Only place I use RTV is on the upper front edge
> of the timing cover, water passage on the intake
> manifold, and by the rear main seal for the two
> side seals. Very light coating at that.
>
> The "race" option was the oil filter mount
> that has the oil cooler connections on them.
> There was a Datsun Competition oil cooler
> option for the roadsters, which I have seen
> occasional fitted to roadsters.
>
> I am only guessing, but perhaps the thinner
> gasket was used with the "race option" due to
> the additional vibration of the oil filter
> mount, as it also had the heavier oil cooler
> line fittings. I also can see that is a good
> reason to have used a thinner gasket as the
> race engines usually shimmed the oil pump
> relieve valve to deliver higher pressure to
> the main galleys, as the bearings had higher
> clearances.
>
> Cheers,
>
> Tom Walter
> Austin, TX.
>
>
> The Belgian Roadster wrote:
>
> > I have 2 oil filter mounting bracket gaskets.
> > 1 thick, 1 thin.
> > Parts book refered to "race".
> > Which one is the race gasket? And why? What has thickness to do with
> > it?
> > Chris-The Belgian Roadster
> > http://albums.photopoint.com/j/AlbumIndex?u=1424148&a=10670695&f=0
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