RE: Engine bolt replacement

["Retherford, Martin" <MRetherford@xxxxxxxxxxx>]

Thanks Ross

Martin

		-----Original Message-----
		From:	Ross Clifford [mailto:Ross.Clifford@xxxxxxxxxxxxx]
		Sent:	Friday, April 09, 1999 12:25 AM
		To:	'ST@xxxxxxxxxxxxxx'
		Subject:	Engine bolt replacement

		Just to confirm some of the comments that have been raised
on the issue of
		engine bolts.

		Triumph does regular audits on all aspects of the bikes
including the torque
		of engine bolts after the unit has been manufactured. On one
of these audits
		it was found that the torque setting was relaxing
(Loosening) on the lower
		crankcase bolts, this was on investigation of more machines
the torque
		figure varied slightly on about 5% of the machines. This was
thought to be
		down to tool used on the track giving an intermittent figure
(Although all
		tool torque settings are checked daily). Immediately a
service bulletin was
		sent to all dealer informing them to retorque the bolts to
the correct
		figure on service or if the bike was in for any other work.

		Further test at the factory showed that the tool was not at
fault and that
		the problem was that the bolt supplier had changed the
plating on the bolt
		without informing Triumph and the bolt was in fact out of
specification. For
		want of a better description the plating was similar to a
Teflon coating
		that allowed some of the bolts to relax it's torque setting
after some hours
		(Hence the varying figures measured). Triumph have tracked
down the last
		engine that was fitted with these bolts and has found the
earliest engine we
		have not to have this spec bolts fitted.
		A recall has now been issued between the Vin No.s 076,793 -
084,542 (Last 6
		digits of your chassis No.), to have the bolts replaced with
the correct
		specification, not all bikes will be affected in this range
and the majority
		of bikes will be fine.
		The worse symptom if the bolts relax will be an oil weep
from the bolt head.

		Recall notices have gone to all distributors and dealers,
customers on
		Triumph's database will be contacted by letter in the next
few weeks as they
		will have to go through their relevant countries transport
bodies, so if
		your bikes in the affected range then contact your dealer
and get them
		replaced, the job on an ST will taken around 2 hours.

		I hope this clears up any confusion on the issue.

		Ross

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