Originally Posted by
cjtamu
You said your clutch nut came loose previously. So, you have a loose nut on the end of a crankshaft that's spinning 30K+ RPM. Even though your flywheel stayed on you saw what the tiny bit of looseness from the clutch nut not being tight did to the inside of the flywheel. I doubt that crankshaft spinning inside the loose clutch nut did it any favors. That's my reason for suggesting you try another clutch nut and see if that fixes it. Cause one of these days when that nut works loose the flywheel IS going to come off and you're going to be WOT on an engine that suddenly has no load on it. Might not end well.
that's a good point! To be clear I'm fully listening to you.
I'm currently running 1 of 2 old engines donated to me by someone as the track. Still have some compression. But if it goes pop I don't care.
The nut, both times seems to have just backed off a little. I wonder if I have too little or two much bell play? Could it be expanding, compressing against the nut and then undoing?
I'm be sure to use a new flywheel collet and nut when I install my shiny new Blok.
Do you recommend scruffing up the collet and flywheel to remove some of the anodised coating of the flywheel to get better friction? It's a 2.0 flywheel by the way.