Flywheel holes are stipped, for the Pressure Plate
01-31-08, 10:55 AM
#1
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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!
01-31-08, 11:37 AM
#2
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
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
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I use a little loctite as well just to be sure.
02-08-08, 07:04 PM
#12
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...
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...
02-08-08, 11:19 PM
#13
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...
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...
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.
02-08-08, 11:59 PM
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^^ 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!
