Hi Guys
My thanks to all of you who gave me advice on replacing the
crankshaft front seal (11 Mar 08). I learned a few things that may
be helpful:
-
The seal must be 1 and 3/4 inches in diameter. Just 0.01 inches
oversize will not work.
-
Bolt the sump and timing chain cover together before inserting
the distance piece.
-
Be sure the distance piece slides nicely over the crankshaft.
Against strong advice I said I would try the teflon seal because I
already owned one. I lied. I actually had two teflon seals and one
standard seal. I measured their diameters with a caliper (accurate
enough) and found the standard seal and one teflon seal to be 1 and
3/4’’, but the second teflon seal was 0.01’’ oversize. Both teflon
seals came from the same regular in a Jaguar kit. Each was in a
plastic bag with the same manufacture date.
You would think that 0.01’’ would not make any difference, so I
fussed around with the larger seal. Altho more compressible than
the standard seal, I could not seat it in the sump or the timing
chain cover. I had all the same problems described by Glen Jarboe
(23 Nov 07) in detail and Dagenham (11 Mar 08). Putting in the
distance piece would not force the seal to seat.
In contrast, the 1 and 3/4’’ diameter teflon seal seated just fine
without the distance piece. To avoid straining the seal I bolted
everything together, sump to timing chain cover, before inserting
the distance piece. The Cometic gaskets are 0.02’’ thicker than the
paper gaskets, and 0.01’’ seems to make a difference here. I chose
the Cometic gaskets because they made the sump semicircle exactly
7/8’’ deep. I did not remove the timing cover, but had to assume its
semicircle was 7/8’’ deep. I used Hylomar only at the joints where
timing cover, sump, gasket, and seal came together. I have not run
the engine a lot, but so far no leaks.
My new distance piece did not really want to slide onto the
crankshaft. I smoothed the crankshaft and reamed out the distance
piece a bit with 400 grit sandpaper.
If your teflon seal is oversize, you can sand it down on a drill
press or a wood lathe. You could turn a spindle to hold the seal
on a lathe. I found the yellow plastic for putting the seal on the
crankshaft jammed nicely on the chuck of my drill press. 220 grit
3M stikit sandpaper on a wooden block reduced the oversized seal to
1 and 3/4.’’
Two different sizes of teflon seals would explain why some people
have success and others dont.
I hope this helps someone -Curt–
Curt Johnson 67 E-type S1 FHC, 57 TBird, 53 MG TD
Corvallis OR, United States
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