Knock found....maybe

desmo1098s

desmo1098s

New member
I have been "battling" a knock issue since my motor rebuild. At first I thought it was false but the motor is making noises. You really hear this knock while riding by a tall building or wall and get the echo of knock. I am almost sure it is pas. side lifters/rockers. I switched to a thicker weight oil yesterday and it helped a little. Under boost it goes away. The "knock" is only there at 5-10% tps cruising and oddly enough at the top of first gear. The knock has perfect rhythm and is not ping at all. It is like a really fast and loud metronome that will come and go. It completely goes away at 55-60mph cruising :squint:. Is this a curable noise? I don't like listening to it nor my Ty as it is pulling timing all over the place. Suggestions? The Ty pulls like a freight train under boost.
 
bezerk

bezerk

New member
Re: Knock found....maybe

i have the same thing on my Ty, already swapped lifters, did the hot lash thing, swapped rockers, i know it's 1 rocker being loud.
i had some misfortune with this engine, it had metal shavings in it 2 times badly due to some build problems. i think to much dirt came into the valley causing the bore to leak and now there isn't enough oilpressure to keep the lifter/rocker to adjust. if i put pressure on the rocker with a piece of wood the sound goes away.it's a bitch
also this sound goes away under boost. this keeps me from tuning it :(
 
desmo1098s

desmo1098s

New member
Re: Knock found....maybe

Thanks bezerk. I switched to 20/50. I am going to try and find someone local to help me try and quiten this motor down. It is beyond my ability to do rocker/lifter repair and/or inspection.
 
bezerk

bezerk

New member
Re: Knock found....maybe

please keep us updated. i would like to have mine fixed one time.. i still did a 12.8 untuned at 12psi. but i would like to have it tuned.
 
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