400ex Engine knock
#1
400ex Engine knock
I have a 01 400ex and recently i have noticed a ticking noise coming from the motor i cant pin point where its comming from its either the topn or bottom end, it rode fine until just the other day it bogged down even at full throttle it bogged worse n worse then just shut off and wouldnt spin back over, thought it locked up but after about 20 min. and i got it towed out of the woods, it started up ran fine didnt miss a beat but tht ticking was a lil louder, so i rode it a lil more and it ran fine till it bogged down again and shut off, this till it would spin over just wouldnt fire and after letting it sit for 20 min. i got it started but it now seems to have a lil knock to it, what could my problem be?? Also i pulled the dipstick and the oil was cold and i had been running it for three hours?? Im thinking its time for a rebuild, how much is tht goin to put me in
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#4
I'd say your oil pump failed and you heated up the piston and rings, and they expanded to the point where it couldn't move. Then after a cool down, it shrank and worked for awhile again. But you've also damaged something in the process. I'd say you need to take the jug off and take a look. Don't run it again until you have a look.
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i doubt its the valves i had the same problem,my oil pump failed,the piton melted and when it cooled down it freed itself,and i guarantee the heat from the oil pump failing stretched that cam chain,you need to tear the top end off get it bored,new piston,new cam chain,and put a new oil pump in it,mine started to bog then when i got up to 3rd it bogged bad then just shut off,by the time i washed it and tried starting it back up the motor was cool and it started up like nothing happen,well i tore the top end off and sure enough there was aluminum and scratches in the cylinder walls where the piston had stuck,i put a new cylinder,piston,and oil pump in it and its been running great ever since
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