Hi all,
Just a comment on unleaded fuel.
I decided a month ago to use "premium unleaded" (97 RON) in my 2500TC with a fully reco'd engine which has done 20,000 Km. It has a vacuum operated upper cylinder lubricant dispenser fitted, no hardened valves or seats.
Had to set timing to 3 degrees BTDC to stop knocking. It initially ran well and have put two tanks of fuel through and done about 1000 Km. It started idling a little roughly last week.
I don't know which valves are supposed to be affected by the use of unleaded, (I thought it was exhaust valves). Checked it out last Sunday. Tappet clearance on all inlet valves down significantly on what I had last set them at (set at .25mm, down to about .15mm), clearance on exhaust valves was OK.
Compression down by 5 - 7 psi on all cylinders. I didn't think to recheck the compression after re-adjusting the tappets. Could the lesser compression be a factor of the shorter open time for the inlet valves with tight tappets?
I'm going back on leaded.
Regards,
Bob Hutton
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From: David McDougall[SMTP:[email protected]]
Sent: Tuesday, December 02, 1997 10:26 PM
To: [email protected]
Subject: Unleaded fuel
Al,
If you have to use unleaded whilst in Germany.
And it's only for a couple of months. I doubt
you will experience any problems, as long as the timing
is adjusted.
I'm using unleaded only at the moment, but have not done
more than 75 miles so far. Why not take some of those
additives with you, in case of difficulties.
Good luck.
David.
--
David McDougall | Mailto:[email protected]
(Accounts Dept) | Tel: +44 (0)131 467 8413
MRC Human Genetics Unit | Fax: +44 (0)131 343 2620
Crewe Road, Edinburgh, EH4 2XU. | www:http://www.hgu.mrc.ac.uk
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