ajh Posted October 4, 2013 Share Posted October 4, 2013 In the last week I developed a low idle knocking noise coming from around the crank pulley, it turned out to have come loose but after re-torquing it doesn't seem to have gone away. Is there a common cause for this that is something I can fix in-situ? Ideas? Quote Link to comment Share on other sites More sharing options...
jbs Posted October 4, 2013 Share Posted October 4, 2013 What you've found is the pulley's come loose after being on the crankshaft without being loctited on when the cambelt has been replaced or the threadlock when applied has lost it's adhesive properties-unlikely but possible and the woodruff key and key way on the damper pulley maybe damaged, best solution would be to remove the damper pulley and see if the wood ruff key is damaged-replace if necessary(you maybe able to replace the woodruff key without dismantling the timing chest) and also check the inside of the damper pulley and check the key way, If this is damaged you could possibly get away with welding up the damaged keyway and grind/file the keyway back to original spec, but the only proper way to fix it would be to replace the damper and then when applying it back onto the crankshaft is to apply threadlock onto the crankshaft and also the damper pulley, apply the damper pulley back onto the crankshaft and then apply threadlock to the crankshaft bolt then tighten said bolt to the specified torque setting, I had a similar problem to you when I ignored the threadlock to my cost of a new damper pulley and woodruff key after not applying any thread lock onto the crankshaft and damper pulley as well as the crankshaft bolt too , When this happened to me I thought my engine was self destructing hth John Quote Link to comment Share on other sites More sharing options...
smallfry Posted October 5, 2013 Share Posted October 5, 2013 Agree with above, but if it has damaged the keyway on the crankshaft you may be in trouble. Years ago I had this problem and tried to fix it with Devcon...........a plastic metal. Didnt work for very long. Maybe another one could be cut in a different position ? I dont know if this might affect the engine balance though It was caused by me not doing the bolt up tight enough after a timing belt change. i though it would be tight enough................Didnt have a big enough torque wrench see. Do NOT underdo the tightness of this bolt Quote Link to comment Share on other sites More sharing options...
jbs Posted October 5, 2013 Share Posted October 5, 2013 The woodruff key and key way on the damper pulley seem to me as being sacrificial as thats the only place I saw was damaged when I had the problem I posted above John Quote Link to comment Share on other sites More sharing options...
ajh Posted October 7, 2013 Author Share Posted October 7, 2013 On a related note; does anyone know the difference between ERR751 and ETC4077 given that the 2nd one is about twice the cost. Quote Link to comment Share on other sites More sharing options...
Nigelw Posted October 7, 2013 Share Posted October 7, 2013 Looked them on the google images and one says 200Tdi an another says 2.5N/A diesel but they do look very different parts. http://www.ebay.co.uk/itm/Land-Rover-Defender-200TDi-Crankshaft-Damper-for-Pully-ERR751-/221010156006 http://www.ebay.co.uk/itm/Land-Rover-Defender-Crankshaft-Damper-Pulley-ETC-4077-Superceeded-ERR3093-/121034747035 Quote Link to comment Share on other sites More sharing options...
ajh Posted October 7, 2013 Author Share Posted October 7, 2013 Microcat seems to think both will fit a 200TDI though. Quote Link to comment Share on other sites More sharing options...
ajh Posted October 7, 2013 Author Share Posted October 7, 2013 though clearly ETC4077 is the correct part. Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted October 7, 2013 Share Posted October 7, 2013 The NA, TD and 200TDi have the same crankshaft, just with a different part number so, the key should be the same because the crank pully is the same. Quote Link to comment Share on other sites More sharing options...
western Posted October 7, 2013 Share Posted October 7, 2013 ETC4977 is for engines without PAS & AC ERR751 is for engines WITH PAS & AC see notes on page 174 in http://www.retroanaconda.com/landrover/parts_books/110/3_engine_200TDI_300TDI_V8_p168-299.pdf Quote Link to comment Share on other sites More sharing options...
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