Few weeks ago I made a couple flywheel locking tools for another local 928 owner and for myself. My father has a gear cutting machine chop so duplicating the original locking tool was easy. From the steel stock we made enough to get a few more tools than I need. Also as a QC, did all the testing on the parts car so the tool fits just as the original, essentially it is a duplicate (used an original tool to take all the measurements).

I’m asking $50 USD/each, this includes shipping to Canada and the continental US.

If there is interest I might consider making more but for now I only have a few available.


As a side note:
Interestingly the original locking tool, sold as an original Porsche part, and made in Germany, has imperial teeth. Odd considering everything (except rim/tire diameter) is metric on the 928. I wonder why Porsche decided to make this considering all their tooling must have been metric too.

 

Hi;

Assuming that the locking tool can be attached with the engine in the engine bay...count me in. How do I pay?

Thanks
Mike Pate
m_j_pate@maranatha.net

 

Mine is an auto....assuming this makes no difference.

Mike

 

I find my teeth are TOO SHORT to lock reliably without slipping. Can you make them bigger? Then I will buy one Imo

 

So is the parts car that I did the test fitting. Th tool is listed to be the same from I beleive '83-up.




heinrich,

Are you saying that the teeth on your tool don't go far enough into the flwheel? Have you tried making the bolt holes a little larger so the tool can be moved furhter into the flywheel? Mine meshed perfetly when I tested it.

I could perhaps make a new one but need to know how much furhter in or larger the teeth have to be. I think there is a problem with the locking tool you have. Perhaps a manufacturing defect?

 

heinrich,
928 Motorsports and 928 int'l both sell Universal Flywheel Lock Tools that will fit all model year 928's. I know for fact they are manufactured to a tighter tolerance than the factory tools. You might want to give them a try.
(btw, they are also Rennlist Site Sponsors)

 

Imo that is a great idea thanks but I did that, the bolts do not grip it hard enough, so the tool slips. Actually I've heard that this is a common problem. Maybe I should send you mine, so you can look at it in-place. I can tell you it SUCKS to reef on that massive breaker bar on the flywheel bolt, only to OH SHEEEET!!! have it slip, GRIND, and then your engine is somewhere out of rotation. I positively hate this tool.

 

Tim thank you. I do believe I have a VERY original tool. Been doing this a while Cheers Tim, all the very best ... and I do hope to actually meet you in-living-colour sometime

 

Heinrich,

if you can, take a picture of the tool from the top with a scale next to it, I can then comapre the two. I know for 100% that it works on an '83 (original tools owner) and fits like a glove on an '86.5.

CORRECTION: Its' an exact copy of the flywheel locking tool that is made to fit all the 928s from '83-'95.

 

I had that happen once. Since then, I am very careful to push the tool hard against the ring gear, and I snug the bolts really hard. One problem is that if you really honk on these bolts, you will strip the bellhousing (aluminum) threads. I noticed a few threads came out with the bolt last time. The bolts are short and don't engage the full threads either. So, this can be a problem. I have since bought the universal lock but I haven't verified that it is a tighter fit.

 

For the automatic cars you need to use longer bolts than those which Porsche used to secure the thin cover for the unused clutch slave cylinder, 8 x12 mm where the slave on a manual gets 8 x30 mm bolts .

 

Jim is 100% correct! The auto bolts only hold it with only a couple of turns. I had to use longer ones to test it.

 

Bill;

Does it help or hurt the situation to use an impact wrench on the flywheel bolt, with the lock in place? I know some say that the sudden impact helps by speeding breaking the bolt loose, others say that the impact vibration on the crank is not a good thing. What is your take on this?

Thanks

Mike

P.S. 3 weeks until I fly down and pick up the 86.5 from Deveks..Thanks for your help!

 

Yes, this is good advice, as always! I still would not honk on the bolts too hard.

 

At least if you did strip out these bolts they would be pretty easy to fix ! unlike oh so many others !