shaikhzeep

Thanks 77tony

ROG100

Hi Houssam,
I have nothing used but I do know they still have 22 GTS cranks in Stuttgart at the knock down price of $8500 each.
Pistons are slim pickings - they have 6 of the 100mm Grp2 at $600 each. They probably forgot a 928 has 8 cylinders.

Mark at 928 Int. is your best bet for used or new old stock.

shaikhzeep

To 77tony ,Thanks for your support. already PM him and we are in completing the deal regarding the pistons.

Now we lift with the crankshaft....

shaikhzeep

Hi Roger,

I am making the deal for the pistons with Herman.I am looking now for the crankshaft.Hope someone has it in his carage ....

I checked with Mark and he dose not have....

Rob Edwards

What's your intended use for these GTS parts? If you want GTS pistons and crank it sounds like your constraints include using a stock block with 100 mm bores.

If you can't find a good GTS crank and R2 rods, Greg Brown has GTS-stroke cranks available that have improved oil delivery to the rod journals, and matching Carrillo rods that (I assume) could be made to work with GTS pistons.

https://rennlist.com/forums/928-foru...ankshafts.html

My guess is that the crank and rods from Greg would be about $5500 or so. Not sure what a set of R2 factory rods would cost (they were $170 x 8 when I last checked in 2010, so that's $1360), , and not sure what the market for a GTS crank is like these days but I wouldn't sell one for less than $2K. And the crank and rods from Greg would be a much better option, depending on your intended use.

FBIII

What are you using for rods?

77tony

Glad to hear that part of the equation worked out for ya. T

shaikhzeep

Good day to every body.
The deal with Herman for pistons completed.

shaikhzeep

To FBIII
I am using the original rods.i want to build the engine as original.with no modification.i know some engine run like 250000 miles till first overhaul. Actually my engine fail after 50000 km.i don't know why? I know the failure is failure of crankshaft thrust bearings .the car was parking for more than 15 years and I bought it from previous owner with this problem.
any way. I am building this engine again and survive this beauty.

shaikhzeep

Ok new news.i found a crankshaft.and I am in the process to finish this deal.

namasgt

You had the trust bearing fail, any damage to the engine block?
Trust bearing failure happens on the automatic 928, mostly to later cars 87-95.

http://jenniskens.livedsl.nl/Technic...ingFailure.htm

https://rennlist.com/forums/928-foru...pictorial.html

The pressure on the flex plate will have to be released every few thousand miles. Some are using an aftermarket clamp to stop the shaft from pushing against the crank.

namasgt

Also, what year is the car. In 94 they changed the rods from 1R to 2R. So if you have 1R rods you may want to consider replacing them with 2R rods since the engine is already apart.

Edit: better link

https://rennlist.com/forums/928-foru...-gts-rods.html

GregBBRD

Incredibly rare to have the crankshaft ruined and have the engine block survive. Almost 100% of the time, the destroyed crankshaft will finally grab the destroyed thrust bearing and spin that bearing in the block.

Inspect the upper block very carefully. There are usually cracks in the very brittle Alusil material that migrate out through the water jackets. Even if the cracks are very small, they will continue to crack, after you re-assemble the engine and it will fail almost immediately. The Alusil alloy is incredibly brittle.

If, by some incredibly rare miracle, there are not cracks, you will need to clean the sealant off of the block and the cradle and torque the cradle onto the block to carefully measure the bore of the center thrust bearing. It's virtually impossible to have the center thrust bearing fail and still have a "round" hole for the new bearings. I've never seen one that doesn't need to be align bored with even minimal crankshaft damage.

If this engine has the 1R connecting rods, they are junk and need to be replaced with the 2R version.

This thrust bearing failure is a real "bag of snakes".

Good luck!

namasgt

50,000 km is about 31,000 miles. If this car is an automatic GTS, pretty low miles for a trust bearing failure. I thought failure usually happened around 70,000 to 100,000 miles. Unless at the factory some of the cars didn't get proper torque on the flex plate clamp bolt?

FredR

Sheikh,

I think you need to re-visit the cautionary posts we made when you first introduced yourself and your 928.

The 928 motor rarely survives thurst bearing failure and until you have dismantled the motor it will not be apparent just how far reaching the damage is. As Greg has already articulated, when the thrust bearing fails it invariably spins in the crankcase and leaves hairline cracks and when that happens the block is to all intents and purposes history. You may be lucky but the fact that you seem to understand thrust bearing failure has occurred sad to say tells its own story.

Before committing to buying "bags of bits" you will do well to have the motor completely disassembled and analysed by someone who knows what they are looking at. Hopefully our fellow listers will be empathic.

Building a GTS motor piece by piece is not a cheap alternative. Your cylinder heads/cams are probably the only recoverable item and even then the tappets are probably toast because of entrapped metal and the oil ways will need a competent flush.

Sad to read this but you really need to advise the list exactly what you know before jumping to the next step as it were otherwise we cannot advise you appropriately.

I sincerely hope your problem is overstated.

Regards

Fred