Twinky Posted July 11, 2012 Report Share Posted July 11, 2012 (edited) Hey guys, 5k started to make a clack clack clack sound about 5 mins before I got home. The sound is similar to a tappet being out of adjustment but much louder. During driving there was no power loss or decreased driveablility. Initially I thought maybe a bent pushrod had bent but after taking the rocker cover off I see that the pushrods are all straight and are not fouling against anything. What do you guys think this could be? One of the hydro lifers are shot or something worse???? I have a 4k sitting in the shed so I do have a spare motor in case this is a terminal problem. cheers Edited July 11, 2012 by Twinky Quote Link to comment Share on other sites More sharing options...
ke70dave Posted July 11, 2012 Report Share Posted July 11, 2012 could be anything really. id whip off the rocker cover and inspect the valve train, turn the engine over with the rocker cover off and check to see if its all working as it should (cut the spark though). Quote Link to comment Share on other sites More sharing options...
Silly Rabbit Posted July 11, 2012 Report Share Posted July 11, 2012 Spun bearing? Were you driving it in a spirited manner?? :) Quote Link to comment Share on other sites More sharing options...
Twinky Posted July 11, 2012 Author Report Share Posted July 11, 2012 Valve train is all in order I've spun it by hand and had it at cranking speed. Sometimes the clacking sound is there at low rpm but when you raise the rpm the clacking is constant. I rarely ever reach 5000rpm with the motor but yes the foot was down on the throttle, when I lifted off I heard the clacking and then it just started to get louder and more constant after that. Ow well...... 5k out and 4k in it seems. Pain in the arse..... Quote Link to comment Share on other sites More sharing options...
19914afc Posted July 11, 2012 Report Share Posted July 11, 2012 Could be bottom end bearing but really need someone to listen to it to confirm. Quote Link to comment Share on other sites More sharing options...
ke70dave Posted July 11, 2012 Report Share Posted July 11, 2012 very difficult to diagnose over the internets, but yeah certainly doesnt sound good. just make sure it isnt something simple first. ancilaries playing up, clutch maybe, water pump maybe (i dunno, just check all the things easier to fix things you might miss before you rip it appart...) Quote Link to comment Share on other sites More sharing options...
B.L.Z.BUB Posted July 11, 2012 Report Share Posted July 11, 2012 Yeah, do that ^ one day I changed my center drive shaft bearing because there was a clunking noise and it ended up being loose wheel nuts. FML. Quote Link to comment Share on other sites More sharing options...
Twinky Posted July 11, 2012 Author Report Share Posted July 11, 2012 I can definitely hear it coming from the engine, sitting there idling you can clearly hear it coming from the rear side of the engine. Quickly checked everything else and nothing out of the ordinary. Either way it seems as the engine needs to come out. Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted July 11, 2012 Report Share Posted July 11, 2012 Broken ring.. you're right though Twinky, motor has to come out. Quote Link to comment Share on other sites More sharing options...
Twinky Posted July 11, 2012 Author Report Share Posted July 11, 2012 Well I suppose this gives me an opportunity to rebuild the motor. Clean up the 4k and stick it in then in the mean time fix the 5k. I'll take another day off work soon and then I'll find out exactly what the problem is then. Quote Link to comment Share on other sites More sharing options...
Jono.C Posted July 11, 2012 Report Share Posted July 11, 2012 Could be way off here but check the exhaust 3 bolt flange gasket.. In my mates car the nuts backed off and everytime you drove it it made a loud tapping sound that sounded like tappets but was actually exhaust.. Quote Link to comment Share on other sites More sharing options...
7shades Posted July 11, 2012 Report Share Posted July 11, 2012 Flywheel bolts... Quote Link to comment Share on other sites More sharing options...
67Rolla-Ken Posted July 11, 2012 Report Share Posted July 11, 2012 It's amazing that for such a simple engine it can still be so many different faults. :hmm: Times like that I wish I lived next to a trustworthy mechanic (oxymoron, I know) that loved to help his neighbours. Quote Link to comment Share on other sites More sharing options...
springersrolla Posted July 11, 2012 Report Share Posted July 11, 2012 grab a long length of hose or a long screw driver and at least try and centralise the area the sound is coming from, does it click click click faster or louder with rpm? Quote Link to comment Share on other sites More sharing options...
Boosted Posted July 11, 2012 Report Share Posted July 11, 2012 Valve train is all in order I've spun it by hand and had it at cranking speed. That really doesn't tell you much. You need the rocker cover off and check it hasn't spat a rocker arm, or sneezed a valve in the guide or even broken spring. Could be the piston chasing the valve home. Quote Link to comment Share on other sites More sharing options...
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