Your 928's great V8 engine can completely break down if you don't address this problem. People call this the flexplate problem.
The flexplate problem causes the crankshaft to be pushed forward, which will cause the axial crankshaft bearings to wear out quickly and eventually the crankshaft and lower block are written off. The crankshaft bores through the engine block, so to speak. It's a matter of just 3 to 5 mm but with that, it's done.
Many designs and very beautiful products have been created for this purpose. We focused on pure functionality and came to the conclusion that all other designs make 1 mistake. One makes a clamp of two halves on a shaft consisting of three segments. The compression force on the three segments is then never equal on the three segments. A simple vector force calculation shows that. Porsche's original clamp was also designed with a single bolt and two segments.
The clamp we designed has also remained relatively small so that its weight remains small. This keeps the centripetal forces pulling the clamp apart smaller.
This new clamp is made of 3 circular parts that fit perfectly around the original flexplate clutch sleeve. We use 3x M8 very strong 12.9 socket head bolts to tighten the clamp to 60Nm. With this new clamp, the problem disappears completely. It holds the driveshaft as the Porsche engineers intended.
Below is a photo of the average 928 automatic, before and after releasing the original clamp. You can see (with difficulty) that the visible part of the splines gets shorter. So the clamp has shifted slightly by loosening the bolt.
Thus, in our opinion, we managed to achieve the best solution for the lowest price. Installation is quite easy, you can wait for it with us. For models up to 86, it can be done in about 2 hours. On later models, the exhaust has to be dismantled first.
Suitable for all 928 models
Porsche 928, 928S, 928S4, GT, GTS
Reference number:
92242125500, 92211604103
Tags:
Flexplate problem, porsche 928 engine problem, slijtage, torque tube
