Myles Posted September 16, 2014 Share Posted September 16, 2014 Anyone know what the recommended torque is for the in-head coil bolts on an eu3 k-series? Not sure where my Haynes has got to.... Mine have loosened twice recently - I swapped the coils and hand-tightened them out of laziness... ...more to the point, they are possibly coming loose partly as a result of a kind of 'gritty' vibration the engine is exhibiting. It's a kind of mirror-wobbler - low amplitude, plenty of energy (you can feel it throughout the car), not specific to any given load, rev-range etc. - it's always there... Engine seems to pull fine - only thing I can think of checking next is to see whether the bearings on the alternator are ok (it's almost new in mileage terms - just a few hundred miles - works perfectly, electrically though). Hmmm!?!? Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted September 16, 2014 Share Posted September 16, 2014 Spot of loctite ? I just do them up with a 1/4" drive ratchet. Link to comment Share on other sites More sharing options...
mav Posted September 16, 2014 Share Posted September 16, 2014 iirc 6 - 8 or is it 8 - 10 lb ft - same as cam cover bolts. nipped not an ergh. Never used a torque wrench on them... Edited by - mav on 16 Sep 2014 22:06:27 Link to comment Share on other sites More sharing options...
revilla Posted September 16, 2014 Share Posted September 16, 2014 I've got 8 Nm or 6 ft.lb. Link to comment Share on other sites More sharing options...
Myles Posted September 17, 2014 Author Share Posted September 17, 2014 Thanks. I don't think I've ever used a torque wrench on these either (partly as I didn't have one that went that low until a year or two back). As to the vibration (that I presume is the cause of them loosening), I think I'll try removing the alternator belt, checking for any obvious bearing issues - and then firing it up with the alternator disconnected as a starting point. Not sure what else I can easily do at this point...(?) Link to comment Share on other sites More sharing options...
revilla Posted September 17, 2014 Share Posted September 17, 2014 Are the engine mounts all good? It's not some kind of resonance with the whole engine oscillating is it? Link to comment Share on other sites More sharing options...
Myles Posted September 17, 2014 Author Share Posted September 17, 2014 That did occur to me. I inspected one visually yesterday - and the rubber does look cracked. When I investigate the alternator, the first thing I'll try is to lift the sump gently and see if the mounts are ok. Link to comment Share on other sites More sharing options...
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