Larry,
Most of the auto parts stores that loan tools have the pilot bushing removal
tools. The tool has 2 fingers that hook to the inner end of the bushing and
pull it out by a jackscrew or slide hammer. If your old bushing was "bottomed
out" in the hole, which it should not be, the tool wouldn't work. For the
roadster, I haven't seen a spec for the depth of the bushing, but my Nissan Z
car manual states that the outer end of the bushing should be 4 mm from the
outer end of the crank hole. It warns to not insert the bushing too deep. This
4 mm just happens to be the inner edge of the bevel in the outer end of the
hole. Regardless, on my future pilot bushing replacements, I'll verify that the
tranny input shaft doesn't bind in the bushing by doing the same test I did when
I found this problem. Before installing the clutch, bolt up the tranny to the
engine. With the tranny in any forward gear, turn the engine crank and
determine that the tranny output shaft does not turn (requires having the
driveshaft inserted on a 4 speed). If the output turns, you may need to insert
the bushing a little deeper in the hole.
Good luck.
Gary
P.S. Don't forget to check for a slipping clutch belt :-)
"Dziuba, Larry" wrote:
> Hello Gary and thanks for the timely advice. I hope to set my new bushing
> this weekend. I had to cut the old one out w/ a piece of hack saw blade
> (the grease/hyraulic removal method would not work even after more than a
> dozen tries). I am pretty sure the new bushing is the same length, but, for
> an eighth of an inch I had better check it again. I did not think it would
> be a problem especially since the previous owner did not even have that
> thick bellhousing plate installed. I found it in the trunk. So how did you
> get the bushing in an extra one eigth of an inch if it was already resting
> against the stop? Larry.
>
> -----Original Message-----
> From: Gary Boone [mailto:gboone@sisna.com]
> Sent: Thursday, May 09, 2002 1:09 PM
> To: Datsun Roadsters
> Subject: Clutch release problem found
>
> A few days ago, I posted a message requesting ideas for the cause of a
> newly installed clutch that would not release on a '68 1600. Thanks to
> all who provided feedback. We pulled the engine again last night and
> found the problem. It turns out that the problem was unrelated to the
> clutch. The tranny input shaft was binding in the pilot bearing. With
> the new clutch, we also installed a new pilot bearing (the needle
> bearing type from NISMO). We installed it to the same depth in the
> crank's hole as the original pilot bushing. But it needed to be 1/8"
> deeper in the hole to avoid the tapered diameter section on the tranny
> input shaft. The problem had the symptoms of a clutch that would not
> release because the tranny input shaft always rotated with the engine
> crankshaft even when the clutch was released.
>
> I wonder who holds the record for R & R'ing the same roadster engine for
> the same problem. I don't want to compete for the title even though
> I've had my share of practice lately.
>
> Gary
> WyCROC
> '70 2000
>
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