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Old June 5th 2023, 07:00
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Wally Wally is offline
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Join Date: Nov 2002
Location: The Netherlands
Posts: 2,552
Since I heard a few of us use this thread for info on the G50 swap, I just wanted to give an umonth update on how it worked out over all the past years.

Reason to do this now is that something in my hydraulic clutch set-up has malfunctioned for some (still unknown) reason.
Sympton was a fall of hydraulic pressure so the clutch would not release. This happenend right after first start up of the newly assembled engine with the biral cylinders. Very annoying! But better in the garage then abroad as I did Santa Pod drag racing end of last season, where all was still good (10,58 quarter mile so it worked perfect then).

Main clutch cylinder (still the original Saco unit in the tunnel) looks leak free in the tunnel, so took a picture of the slave in the bell housing (G50 has an inspection hole, works perfect for a small I-phone hehe):



I suspected that it must be the slave, even though I could not see a leak.
So, removed the old unit, bought a new LUK slave, shortenend the arm, tapped NPT thread again, installed it all, but noticed I used a 'temporary' mounting back then, which had hold till now, but I was not assured it could be used as is the second time... (just a M6 tapped into the alu of the bell housing in 3 spots, one of them in too thin material).
Result was a sudden 'snap' after installing engine and a dramtic loss of hydrau fluid under the bell housing... The bottom of the unit was broken out of it due to maybe not seating flush or was it a quality control issue?
Oke... maybe the old unit was of better quality?
Mounted that, same result.. I was further from a solution now then before.
retrieved my old Saab (model 9000 I know now) out of the parts box and tried that again. Nice parts, didn't understand how that would seal itself after disassembling everything, but hey, I am no Saab TOB expert right?
As the Saab unit was about 8mm too high, I has a friend machine the parts so it would be smaller. As I need to start the operating range all out at the bottom of the 'stroke', trimming some excess stroke didn't seem a problem.
Looked good installed. Never knew M12x1.0mm connections existed, but thats what the Saab unit works with... Oke, got those suckers and installed them on some new lines.





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