240 5 speed question

[Daily02]

Hello All,

I am preparing to do a Getrag 240 5 speed swap into a 1974 2002. The 5 speed is from a 318i. The information required at this point is the clutch release fork, slave cylinder, and the release bearing the same as on the 320i with a 245 5 speed? I will be using the stock 1974 clutch.

 

Regards

 

Dono

[TobyB]

www.realoem.com will answer this and far more questions like it!

 

(I think so, but I've never stuck them side by side to be sure)

 

t

 

[Daily02]

Hey Toby, 

 

That site is great. It found the 320i release arm 21 51 1 204 229 and the slave cylinder 21 52 1 116 300 (numbers from document "BMW '02 Transmission Upgrades"). The above items were shown fitting e21 & e30.  The 320i release bearing 21 51 1 225 168 was not found, since the arm & slave cylinder are  the same it is likely the release bearing is as well? A aftermarket part website selling release bearings should confirm this as a search for each may yield the same replacement part.

Thanks! 

 

Regards

 

Dono

[tech71]

5 speed E21 and E30 84-85 318i use the same release bearing, fork and slave cylinder.

I have read here that use of a 228mm flywheel/clutch requires a different release bearing but I cannot confirm that, seems odd though.

Survivor is fitted with a G240 from an 85 318i with 215mm clutch/flywheel. stuff above works 

Edited March 1 by tech71

[Son of Marty]

Yes the T/O bearings are different between the 215mm and 228 clutch, one is taller than the other, but I don't remember which one that is.

[tech71]

So, as long as OPs flywheel is still 215mm and has not been swapped to the larger 228mm version, the above stuff should work.

@Daily02 time to confirm what size flywheel is installed in your car...

What specific release bearing (from what model car) works with 228mm flywheel? 6cyl E30? Anyone?

Edited March 1 by tech71

[Son of Marty]

It's the T/O used in the 323i's.

[Greg Mierz]

Here's a picture of the difference. The left one is the normal throwout bearing and the right is the correct 323i bearing. I ran the wrong one for over 20 years and the slave cylinder eventually went out from the throw difference between the two. I can't really say if the correct one feels any different in use. 

Edited March 1 by Greg Mierz
forgot picture

[jimk]

The height (H) dimension is from the ears where the fork makes contact to the face of the clutch contact area.  Flip the bearings upside down and measure from the ears to the table.  The H dimension is posted in RealOem part list.

Edited March 1 by jimk

[TobyB]

The larger diameter clutch is shallower, so a 228 with 5 speed ought to use the 323 throwout.

 

I did one that way, one the other way, and never really noticed much difference, either.

 

t

 

[jimk]

It may be, while using the short bearing,  if the step cut on the flywheel was at it's max, the slave rod could reach near or at the limit of extension and not release the clutch plate. 

 

On a transmission with the pivot pin at the end of the fork, like the 245, the slave rod stroke is twice the distance the clutch release (throw out bearing - for tractor folks) has to move to depress the pressure plate fingers.

[Mike Self]

Since we're talking about 5 speed conversions....does anyone know the proper throwout bearing to use when installing a 5 speed in an early 2002 (pre 1665200 VIN) that has a 228mm coil spring pressure plate and six bolt flywheel.  I do know that the clutch disk is the same for both 228mm pressure plates.

 

I do know that pressure plate uses a different throughout bearing from the later diaphragm pressure plates, and I don't think the later pressure plate will bolt up to a 6 bolt flywheel.  

 

Anyone out there have a good answer?  Or experience?

 

mike

[TobyB]

Whuf- my only experience is with a 1600-2 that had that style pressure plate, but it was 200(?)mm

and rather... unique.  We ended up finding some older aftermarket parts in the original style,

but the parts that came out were slightly different dimensions to anything I had kicking around.  This was

at least 20 years ago, so the details... well...

 

One of the options is to drill the 6- bolt flywheel for the later pressure plates, I think I read on here once a long time ago.

 

t

who, when he was doing it 'for real' had the luxury of just tossing the 6- bolt cranks in CD's pool.

[Greg Mierz]

Decades ago when I put my 245 in, I got a 6 bolt flywheel from Byron Sanborn  (Preyuppie) that he had re-drilled for the 228mm clutch. At that time you didn't have any way to use the non-diaphram clutch with the 5speed. My 2002 -1663328 is a 6 bolt crank, it was the only option I had. It has worked beautifully for over 30 years.

[zinz]

On 3/2/2024 at 3:09 PM, Mike Self said:

does anyone know the proper throwout bearing to use when installing a 5 speed in an early 2002 (pre 1665200 VIN) that has a 228mm coil spring pressure plate and six bolt flywheel.

 

Mike,

 

When I was putting my '67, 2000CS back together, I had to abandon the early pressure plate because the throwout bearing was NLA...apparently, it's been NLA for a long time, and I could not find one. I had a local machine shop re-work my 6 bolt flywheel to fit a modern diaphragm pressure plate.  (I believe Byron and Toby both chimed in on my question at the time on what needed to be done.) The machinist had no troubles making it happen.

 

Ed

 

Ed