jb84911 Posted 24September, 2012 Report Share Posted 24September, 2012 I went for a run across the Black Spur the week after buying the car. Just got over the other side all the warning lights come on (great). Pull over, engine rattling (even greater). The crankshaft pulley had worked its way off (relief). I managed to get it back on (difficult as there isn't much room, its a double pulley ie. one for the fan, one for aircon.). Ever since then I constantly check to make sure it's still tight (and it has been). Yesterday I went for a squirt with SMT boys, got to the twistie bits and heard a rattle, pulled over and the pulley was coming loose.Obviously backing on and off at higher revs creates enough reverse torque to loosen the bolt. Any suggestions. Locktite? Spring Washer? Thanks John Link to comment Share on other sites More sharing options...
ArthurK Posted 24September, 2012 Report Share Posted 24September, 2012 My RC Helicopters are all held together with Loctite Blue for easy release and Loctite Red for certainty, Green might be overkill. Loctite wouldnt hurt it, is it a grub screw or bolt? Just make sure you use the appropriate loctite product for the environment. Link to comment Share on other sites More sharing options...
Guest vas930 Posted 24September, 2012 Report Share Posted 24September, 2012 Hi, John. I would have thought loctite blue should be fine. Having said that, what condition are the threads and bolts like ? Its worth having a good look, you never know what some clown may have done. Also have a good look at the pulley. Let us know what you find. Link to comment Share on other sites More sharing options...
Glenn Posted 24September, 2012 Report Share Posted 24September, 2012 Nice car. Hope the pulley is an easy fix. Link to comment Share on other sites More sharing options...
PCM911T Posted 24September, 2012 Report Share Posted 24September, 2012 John, I agree with Vas, these components should not be coming loose. Loctite as a minimum,I'd be getting a check over by a Porsche tech with a torque wrench. Has this engine been out lately? Link to comment Share on other sites More sharing options...
jnr356 Posted 24September, 2012 Report Share Posted 24September, 2012 does it have the durlock bolt?(serrations on built in washer of the bolt) Link to comment Share on other sites More sharing options...
jb84911 Posted 24September, 2012 Author Report Share Posted 24September, 2012 Thanks for the comments and advice guys. Just to answer your questions: - It is a bolt - The engine hasn't been out lately - From memory I think it is a durlock bolt What I will do is: - Replace the durlock bolt - Replace the pulley (as I did notice the hole for the locating pin was worn) - Use the appropriate loctite - Attempt to torque to correct specs. (difficult access) Thanks again Link to comment Share on other sites More sharing options...
jnr356 Posted 24September, 2012 Report Share Posted 24September, 2012 replace the durlock bolt and torque(180nm from memory) i have never used loctite on these,never had one come loose Link to comment Share on other sites More sharing options...
wasserkuhl Posted 24September, 2012 Report Share Posted 24September, 2012 What jnr Said, it is 180nm and get a new Bolt. Engage 5th gear and apply handbrake before you tighten her up. I'd recommend doing a partial engine drop to get full access and get the right torque on it. A new Pulley and Bolt would be the best way forward. It should not need loctite if you have applied 180nm to it. Link to comment Share on other sites More sharing options...
jb84911 Posted 25September, 2012 Author Report Share Posted 25September, 2012 Thank you both for the advice. Just checked the Bentley manual. Its actually 80nm Link to comment Share on other sites More sharing options...
J.J. Posted 25September, 2012 Report Share Posted 25September, 2012 woah, big difference! lucky you checked Link to comment Share on other sites More sharing options...
jb84911 Posted 25September, 2012 Author Report Share Posted 25September, 2012 80nm is not a huge amount considering the oil drain plug is tightened to 70nm. I think my main problem is the condition of the durlock bolt and pulley. Link to comment Share on other sites More sharing options...
J.J. Posted 25September, 2012 Report Share Posted 25September, 2012 i'd buy a new bolt and pulley just for peace of mind Link to comment Share on other sites More sharing options...
jnr356 Posted 25September, 2012 Report Share Posted 25September, 2012 80nm is for a single pulley,you'll find a dual pulley is considerably more Link to comment Share on other sites More sharing options...
jb84911 Posted 25September, 2012 Author Report Share Posted 25September, 2012 Good point I'll check it out. Thanks Link to comment Share on other sites More sharing options...
Guest vas930 Posted 25September, 2012 Report Share Posted 25September, 2012 Nice work again, Jnr. Link to comment Share on other sites More sharing options...
wasserkuhl Posted 25September, 2012 Report Share Posted 25September, 2012 80nm is for a single pulley,you'll find a dual pulley is considerably more Yep. Dual Pulley is 180nm. 80nm is for single......................Strange that the Bentley didn't detail this? Link to comment Share on other sites More sharing options...
jb84911 Posted 26September, 2012 Author Report Share Posted 26September, 2012 Had a quick look in the Bentley I could only find the single. It is strange. Anyway lucky you guys are on the ball. Thanks again Link to comment Share on other sites More sharing options...
Mike Posted 12October, 2012 Report Share Posted 12October, 2012 Just found this thread, how did it go? If you havn't already done this job. Make sure the end of the crank has not been damaged and the pulley is a snug fit, also the hole on the end of the crank is still round. You might need to get a new pin as well or a longer one to help support and locate the pulley correctly. Link to comment Share on other sites More sharing options...
jb84911 Posted 12October, 2012 Author Report Share Posted 12October, 2012 Thanks Mike. I'm going to get on to it next week, appreciate the advice. I'll let you know. John Link to comment Share on other sites More sharing options...
wasserkuhl Posted 13October, 2012 Report Share Posted 13October, 2012 Some have put two dowel's in the end of the crank to be sure, to be sure!!! New pulley is a must!!! Link to comment Share on other sites More sharing options...
9fan Posted 13October, 2012 Report Share Posted 13October, 2012 Better get busy John ! Don't see your name down for the next SMT yet ? Cheers,Mark. Link to comment Share on other sites More sharing options...
jb84911 Posted 29October, 2012 Author Report Share Posted 29October, 2012 Finally got around to it. The end of the crankshaft was fine but the corresponding face on the pulley was pretty average and the locating hole was elongated. Replaced the pulley and bolt, torqued it up everything fitted nice and snug. See you all on the 11th. John Link to comment Share on other sites More sharing options...
9fan Posted 29October, 2012 Report Share Posted 29October, 2012 Finally got around to it. The end of the crankshaft was fine but the corresponding face on the pulley was pretty average and the locating hole was elongated. Replaced the pulley and bolt, torqued it up everything fitted nice and snug. See you all on the 11th. John I knew you'd make it ! Cheers,Mark. Link to comment Share on other sites More sharing options...
T-Man Posted 29October, 2012 Report Share Posted 29October, 2012 Good to see its sorted John. Don't know if Mark would turn back next time. Link to comment Share on other sites More sharing options...
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