flying flywheel

Ridge · Post by **Ridge** » Sun Aug 31, 2008 10:38 pm

I would tell it with humour though serous it is

!

Fortunately I wasn't running the car on the road this time

During my VROOMM VROUMM session this weekend,I was so impressed of how the engine take revs

!then VROOM VROOM goes higher

!

Suddenly

!a dreadful knocking noise came right from the middle of the engine!
I stopped it as quickly as Lucky-Luke would have done

ô dear

I thought I over revs the engine and it broke

!

I could not wait one more minute,I ask for some friends to help me put it down (yes!again!!)
And as I was trying to turn it by hand throught the flywheel,the play was incredibly much that I was yet more frightened

I took the clutches off ,and there I saw 4 broken bolts,the fifth was still in place but loose.

Goodness! I hope this could explain all my fear!!

I should have been much careful as I broke a flywheel bolt while I put it off on the begining of the engine redoing

!

I just replaced the broken bolt and reuse the 4 remaining ones

Now I'm sure

! I will replace them all!

What should be the tightening torque for the 5 bolts?
and for the lug between the bolts,does it play a big role as I don't have it anymore.

Great thanks for any advice

Wally · Post by **Wally** » Mon Sep 01, 2008 11:40 pm

When using new bolts, make sure they are not too long, some 914 bolts are too long(!) (thread them in all the way dry first to check) and pls use the alu washer under the 5 bolts as it provides some resistance against loosening and it adds some spacing.
Use blue loctite on the new bolts and torque them to 110 Nm IIRC (by heart, not absolutely sure, check your haynes manual!)

Good luck,
Walter

raygreenwood · Post by **raygreenwood** » Tue Sep 02, 2008 7:08 am

The five bolt washers that we have always had here...are steel! Without that washer, the bolts will work loose, the same as putting forged head bolts in without washesr. the flywheel material is softer than the bolts. Ray

Ridge · Post by **Ridge** » Wed Sep 03, 2008 12:15 am

yes I have the five holed steel-washer (six holed with the central one),the problem was that bolts broke not loosened.

But yet could be loosened and broke

!you may be right

!
Bolts were also too old to be torqued correctly!

I didn't use Loctite that time,it wasn't that bad 'cause it eased the extraction of the broken bolts

!But I'll do this time

!

Great thanks to you all!

Ridge.