Flywheel holes are stipped, for the Pressure Plate
 

Hey guys, The flywheel i may be getting has a couple (2) Stripped Holes for where the pressure plate goes into. Any easy fix? Thanks guys!:icon_tup:

Helicoil. A properly installed helicoil will be stronger than regular threads. I would pull the flywheel and pay a shop to install the helicoils since doing it by hand doesn't give as good of an installation.

If the helicoil doesn't work I'd scrap it. Pressure plates are under heavy load and high rpm and would be extremely dangerous if it came loose.

Dave

Thats what the guy said from whom im buying it from. Thanks.

You can use a nut/bolt/lock washers combo if you have the clearance on the flywheel to engine side. Flywheels like the Racing Beat don't come with threaded holes for the pressure plate and attach this way.

OK THANKS, so it shouldn't be a problem then hey? is a SR motor sports one aka ACT, hha.

i would enlarge the two holes...and re-thread them and use lock tite

So its a easy fix, if i use nut/bolt/lock washers that wont compromise strength?

Nobody has complained about Racing Beat using that setup. ;) I use a little loctite as well just to be sure.

Ah ic. Any specific combo i need?

i'd worry about balance...

Unless you balanced it when you got it, how do you know it was perfectly balanced to begin with (as well as your pressure plate)?

Well, I used to work at a driveshaft manufacturing plant and I saw my share of driveshafts blow up due to what some people may call slight imbalance (few grams) at 3000 or 5000 rpm which were the balancer's speeds. Some even take out the balancer spindles, tooling and safety guards!!

They were from 1.5" dia front axle d/s to 4.5" dia rear d/s; a flywheel diameter is much larger which in turn means that the imbalance forces are larger as well; also the working rpm is higher. Any high rpm part that is not properly balanced poses a risk of damage or injury.

SFI Specification 1.1 for aftermarket clutches and flywheels state (among many other things) that these components must not deform, crack or otherwise fail after being tested at 150% of maximum engine speed for one hour.

A fun experiment is to drill a small hole in one blade of a desk fan, put a bolt/nut in it and run the fan on high speed...

I would not trust used rotating components unless I had them rebalanced...

My point was, several people have noted unbalanced flywheels and pressure plates. Yet, how many people actually have them checked when they receive it? Probably none. So to be honest, you have no idea if the flywheel or pressure plate is perfectly balanced to begin with...

Technically, even going with a helicoil "could" throw it out of balance as well. So going by your logic, he should have the pressure plate/flywheel assembly balanced no matter what repair he does to it.

My dad has the RB flywheel with the nut/bolt combo holding the pp to the flywheel. zero problems over 3-4 years.

^^ thanks everyone for the replies, makes the sale easier on me. Now any lock nut washer? Specifics, or even part numbers would be of great value! Thanks!

Grade 8 or better, make sure you do all the holes, not just the two that are stripped.

Dan