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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6769   
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When you switch off the engine does it make a chirp noise? And when rolling up to a junction or lights does it feel like the engine is rocking a bit. I had a vibration/rough running problem that turned out to be the crank pulley which as its a duel mass one it was sort of coming loose from the rubber. Ray
My build thread http://www.defender2.net/forum/topic17615.html |
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3rd Jul 2015 10:51pm |
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| bob neville Member Since: 30 Apr 2009 Location: Marbella Posts: 3247  
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My TD5 (15P) had an issue with rough running/flat spot ay 2500rpm.
After replacing lots of bits it turned out to be the spacer missing on the crank position sensor. Easy to check and cheap to fix if it is not there. Bob 2015 Jaguar XE240 R Sport - goes like ....... !! 2013 Defender 90 CSW - sold 2009 Defender 110 Double Cab - sold 2001 TD5 90 CSW - offroad project - sold to a forum member 2011 Porsche Boxster - for the sunny days ! |
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3rd Jul 2015 11:13pm |
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| RCMike Member Since: 30 Apr 2015 Location: North Wiltshire Posts: 70 
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Hi Ray, No chirp. I did check the pulley and no play (i also changed the belt and tensioner) - the old and the new tensioner does however seem to jump in and out a lot when running (hence changing the belt and tensioner) but nothing seems loose (pulley wise). |
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4th Jul 2015 7:57am |
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| RCMike Member Since: 30 Apr 2015 Location: North Wiltshire Posts: 70
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Hi Bob, Not thought about checking that, i'll try it and see. |
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4th Jul 2015 7:59am |
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| RCMike Member Since: 30 Apr 2015 Location: North Wiltshire Posts: 70
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Just thought i'd post up the results of changing various bits in an attempt to reduce the vibs at 2500rpm under load.
The CPS spacing did seem to make a difference, i had wondered about it as the o ring was missing so it had clearly been out before i got the truck. I've changed so much over the last few weeks and everything seems to have helped. I'm not sure everything was strictly required but at least now, there is less to fail/change in the future - so not all wasted. I basically ended up doing the following list, Main belt and tensioner changed - no difference but peace of mind - the tensioner still bounces around quite a lot however (i guess that must be normal as all the other pulleys feel good - no wobbles. Engine mounts - old ones weren't collapsed and the new ones helped a bit Injector harness changed/oil in ECU plug checked - hardly any oil so no difference Injector washers and seals - not much difference but the nanocom readings look much better now so i'm sure it helped a bit Viscous fan replaced - the old one had a slight wobble (the pulley feels fine) - again helped a bit CPS - there is a definite difference with spacing it, so helped a bit Ran new earths from the battery to the ECU and drivers seat box (found black wire syndrome on one earth, but no idea what its for as its just plain black and goes into the big bundle of wires that exit the seat box). Again i don't think it made a difference but i'm sure i'll be glad i did it in the future. New FPV gasket (2nd new one just in case as there was a definite fuel "whooshing" sound when you put your ear close - may be air bubbles ) and i also did the 3rd FPV pipe (the one that's a pig to get to at the front of the engine - didn't do it when i replaced the FPV as it was such a pig to get to.) New fuel filter head just in case it was letting in air - replaced it with a really nice machined aluminium one off ebay - don't think it helped but it looks really shiny (when its not covered in mud). So after all that, almost no unusual vibrations under load left (relative to a TD5 of course). So i'm happy now and think i'll get on with all the rest of the stuff i want to do happy in the knowledge the engine seems a good un. |
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27th Jul 2015 8:36pm |
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