Something to consider... This is a WATERCOOLED engine.  That surface
should, I repeat, SHOULD never see temps anywhere close to 250 deg F.
(Design temp is 192 deg F.)  If it does, I suspect that you have a
more serious problem than a bit of pitting. (And I just ignore it
unless it's *really* severe.  The 'black goop' works fine!

Jim Arnott
WetWesties
Union, OR

Rico Sapolich wrote:
>
> In a message dated 1/15/01 4:11:30 PM, dgalcock@HEWITT.COM writes:
>
> << Sam Walters' "culled from the archives" treatise (all 11 pages of it) on
> JBWelding your leaky cylinder heads is now at http://www.vanagon.org >>
>
> On this forum, I have often read of using JB Weld to fill corrosion pits on
> heads.  I wonder how suitable that really is.  I have only used JB Weld once
> as a grout on a semi-precision leveling job and it seemed to me to be about
> the same as Devcon Plastic Steel Putty.  The maximum operating temperature of
> Plastic Steel, and most other Devcon putties, is 250�sF.  The few Devcon
> products, such as their Titanium Putty, which have higher operating
> temperatures cost about 10 times as much as JB Weld, so, I tend to believe
> that the JB product is probably rated for the lower operating temperature.