Drewmotty Posted April 9, 2017 Report Share Posted April 9, 2017 Can anyone advise the torque for the crank pulley bolt. I've scoured my manuals but can't find it listed anywhere. I've ditched the extension so only have a short bolt and thick washer/spacer. Annoyingly I must have found it before because it's been on and off a few times over the years.....or perhaps I just gave up and guessed before. Quote Link to post Share on other sites
john.r.davies Posted April 9, 2017 Report Share Posted April 9, 2017 (edited) 90 ft-lbs. Found it in my Haynes manual for the 2500 saloon, as I can't see it in the official TR6 manual, but Haynes should be good! John Edited April 9, 2017 by john.r.davies Quote Link to post Share on other sites
Lebro Posted April 9, 2017 Report Share Posted April 9, 2017 Does not appear to be given in either TR2/3/3A manual, or TR4/4A manual odd ? Bob. Quote Link to post Share on other sites
Peter Cobbold Posted April 9, 2017 Report Share Posted April 9, 2017 My TR6's was mild steel not HT, so dont overcook it. The rounded head also suggests to me its not meant need a lot of torque. Peter Quote Link to post Share on other sites
Motorsport Mickey Posted April 9, 2017 Report Share Posted April 9, 2017 (edited) The search function has137 posts on a "Crank Bolt" thread title. When reviewed there are some which refer to the torque including one post from me ( I remembered, that's why I searched), where I state that the Stag is set at 120 lb ft and that comparable size bolt and thread torque is best to be used on 4 cylinders also. I seem to remember having read it also in one of the tuning articles so that's what I set all the 4 cylinders I rebuild. Mick Richardsw Edited April 9, 2017 by Motorsport Mickey Quote Link to post Share on other sites
john.r.davies Posted April 9, 2017 Report Share Posted April 9, 2017 120? Pshaw! The Spitfire's is 150 ft-lbs! John Quote Link to post Share on other sites
Motorsport Mickey Posted April 9, 2017 Report Share Posted April 9, 2017 Much better than having a pulley loosen off and start "fretting" against the key, it's not uncommon to have the key way machined by the key by 3 or 4 mm making a neat notch and a clunk upon take off. Mick Richards Quote Link to post Share on other sites
Guest ntc Posted April 9, 2017 Report Share Posted April 9, 2017 (edited) Can anyone advise the torque for the crank pulley bolt. I've scoured my manuals but can't find it listed anywhere. I've ditched the extension so only have a short bolt and thick washer/spacer. Annoyingly I must have found it before because it's been on and off a few times over the years.....or perhaps I just gave up and guessed before. It is 90 end of and will be a dam sight more when you try to remove it later after a run. Edited April 9, 2017 by ntc Quote Link to post Share on other sites
monty Posted April 10, 2017 Report Share Posted April 10, 2017 Much better than having a pulley loosen off and start "fretting" against the key, it's not uncommon to have the key way machined by the key by 3 or 4 mm making a neat notch and a clunk upon take off. Mick Richards Yes Mick it happened to me. The pulley loosened off due to the bolt being slightly too long & giving the impression of being fully tightened when the end of the bolt reached metal! Fortunately I caught it in time with the only requirement being a new woodruff key & pulley bolt of correct length plus of course the usual new timing cover gasket & oil seal. Previous owner must have been unaware the bolt was a little too long! Quote Link to post Share on other sites
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