Flywheel
Turbo Mini Forums

I am currently trying to get my flywheel off! I have a pulled on it and that has gone solid and nothing is happening!! Does anyone have any tips on how to prize the old girl off? Thanks ben

If something is worth doing, it's worth doing half of.

I meant I have a puller on it! the predective text changed it! Oops

Smack the end of the puller with a big hammer and leave overnight.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

have you got it lined up so that the big triangular bit is parallel to the flywheel? If not you might end up getting the flywheel a little bit wonky on the taper.

Happened to me last week and I ended up snapping the big bolt on the puller!

Wind the centre bolt as tight as you can then hit it dead square with a copper mallet - although your are hitting it in the "wrong" direction, the laws of physics (action and reaction are equal and opposite) puts the shock load onto the flywheel in the correct direction and it will normally jump off.


If not, tighten the puller centre bolt further and hit it (dead square) again....

Otherwise get a decent sized puller or even a hydraulic one...

Schrödinger's cat - so which one am I ???

I go back to find that one the threads has stripped itself! For fuck sakeeeee

I have never, ever stripped the threads on either the 3 small bolts or the centre large one.

What make of puller are you using ???

Are the threads in the flywheel still OK ???

Was it the right bolts - there are two, early imperial and later metric ???

Schrödinger's cat - so which one am I ???

The make is laser I think!? Yeah they were the 3 correct ones and the thread that stripped was in the flywheel!!!

OK, if the thread in the flywheel stripped I have to ask the obvious.... were the three small bolts fully screwed in, ie, the big middle one backed off enough before screwing the small ones in ???

If the little ones were fully in, it will have pulled out all the threads in the flywheel hole so you will have to drill/tap it the next size up (preferably do all 3).

If the bolt that stripped the threads wasn't fully in there are some good threads left at the back of the tapped hole, so you may get away with a longer bolt....

Whatever happens, do NOT try hitting the flywheeel from behind... only take it of with a puller. Hitting from behind (as suggested on some other forums) will either start a crack leading to failure at high RPM or a bent and worthless crankshaft.

(edit - to make better sense)

Edited by Rod S on 8th Aug, 2010.

Schrödinger's cat - so which one am I ???

You have taken out the aluminium keywasher? I took a flywheel off in the dark, outside where time wasn't on my side and hastily forgot to take the key washer out. After 10 minutes I figured out what I'd done. That washer was then fubar!

Yea the 3 bolts were fully in and the correct size! I think I will tap that one thread then do the other ones shen it comes off! And thanks for the advice I appreciate it!!

something is not right,
if the putter is used right it should come off. My laser made puller has taken an impact gun at 200ftlbs and a 13lb hammer to shift a flywheel that has spun.
Flywheel came of with bang louder than my rifle
the puller has been used since

Yes i moved to the darkside

Instagram @jdm_brett

Schrödinger's cat - so which one am I ???

this is my flywheel puller....

On 8th Aug, 2010 Joe C said:
this is my flywheel puller....

"se ne estas rompita, ne ripar ĝi - supercharge ĝi."

I would drill them out a bit bigger, get some longer bolts and put nuts on the back. Use decent bolts, preferably cap screws and there is no way it wont come out.

I too use an impact gun as it hammers and applies torque without rotating the crank much.

Even heavily fretted flywheels come off easy enough.