help, broken bolts in flywheel (1 Viewer)

[ridgeroadray]

i am installing new centerforce clutch in a 2f. torqued bolts at 28 llbs and two bolts broke off in flywheel. i didnt use new bolts, what did i do wrong?

thanks ray

 

[FJ-40Original]

You didn't use new bolts...

You just answered your own question...

They will fetch out of the flywheel very easily if you drill truely. That flywheel is harder than the bolts and the bolts really like to unscrew nicely unless they are bottomed oout into a hole then you're screwed for the ease of things.

FJ

 

[Poser]

Welcome.



If your '28' is foot-pounds that is way too much for those 8mm bolts...


Best bet would be to get a left hand drill bit, center punch the broken bolt well, and hopefully the bit will walk the broken fastener out of the hole while it is trying to drill it.




Good luck!


-Steve

 

[FJ-40Original]

After getting the broken ones out and getting 6 new bolts and new lock wahsers, try not useing a torque wrench and tightening them down a little at a time until everything is fully seated.
Then make sure the split washers are fully flat, tighten the bolt by hand and ratchet until the flywheel and crank start to turn (Plugs installed and all accessories attached).
Then give it about 1/8th of a turn past that and that will be PLENTY of torque to hold the pressure plate in there forever.

FJ

 

[orangefj45]

the pressure plate is held in place with special bolts so get new ones from the dealer.

if you don't want to deal with drilling them out, then weld a nut to the broken off bolt and they'll come right out.

 

[bsevans]

The 6 factory pressure plate mounting bolts have captive lock washers and should be torque to 11-15 ft-lb using a diagonal pattern (see FSM page 2-13 Chassis and Body Repair Manual). Apply the torque in 5 ft-lb increments and make sure you use a thread sealer similar to Locktite. To get the proper torque, it is best to use a tap to chase the threads to remove the sealant from the previous installation.
Lock washers are not used with the factory 2F flywheel bolts. The torque for the six 2F flywheel bolts is 59-61 ft-lb applied in a diagonal pattern (see FSM page 3-44 2F Engine Repair Manual). Apply the torque in 10-15 ft-lb increments and make sure you use a thread sealer similar to Locktite. To get the proper torque, it is best to use a tap to chase the threads to remove the sealant from the previous installation.

 

[Fast Eddy]

To get the proper torque, it is best to use a tap to chase the threads to remove the sealant from the previous installation.

x2 I've been tapping out every hole I can lately. Some of the body holes that seemed stripped come back to life after being tapped out.

 

[Doug_S]

If you'd rather not take the bolt out yourself, you can take it in to a shop and have an EDM erode it out.

 

[FJ-40Original]

You could alway's lay it out in the rain and let time and weather erodeand rust the bolts out of the holes...