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Engine Specific Info and Questions => IDI Engine => Topic started by: Mikeyworks on July 09, 2004, 01:50:13 pm

Title: Torque spec - flywheel bolts
Post by: Mikeyworks on July 09, 2004, 01:50:13 pm

I am trying to sufficiently tighten the 9mm 12-point bolts that hold the flywheel to the pressure plate.

If I read my Bentley right (page 38) I am supposed to use thread-locker and tighen them to 74 lb-ft. Is this correct?

The reason I ask is I just snapped one off while trying to tighten it...and I had only gotten to about 70 lb-ft.

Thanks for the help...by the way, the replacement crank is in...and I am cruising on putting the parts back on to get this thing running...hopefully in the next couple of days depending on free time (what is that?)

Mikey

Title: Torque spec - flywheel bolts
Post by: fspGTD on July 09, 2004, 05:55:31 pm

That sounds like waaay too much to me.  My Bentley manual, for an '77-'84 Rabbit/Jetta Diesel, specifies 15 ft-lbs for the flywheel to pressure plate bolts (and no lock-tite required.)

The Pressure plate to crankshaft bolts get 45 ft-lbs, and you use Loctite 270 or 271 on the threads.  These torque specs can be found on page 72, at the end of section "Engine and Clutch".

Title: Torque spec - flywheel bolts
Post by: Mikeyworks on July 09, 2004, 06:27:44 pm

Thanks Jake....I thought that was way too much for such a small bolt.

I torqued the p-plate to crankshaft bolts to spec....and they came with locktite pre-installed.

Thanks again for the advise.

Mikey

Title: Torque spec - flywheel bolts
Post by: type53b_gtd on July 13, 2004, 08:26:56 am

Mike, I hope you didn't torque the new style shouldered pressure plate bolts to either 45 lb-ft (too low!) or 74 lb-ft.  The correct procedure for these bolts is 25 lb-ft plus 90 degrees.

Title: Torque spec - flywheel bolts
Post by: DieselsRcool on July 13, 2004, 10:20:02 am

Quote from: "type53b_gtd"

Mike, I hope you didn't torque the new style shouldered pressure plate bolts to either 45 lb-ft (too low!) or 74 lb-ft.  The correct procedure for these bolts is 25 lb-ft plus 90 degrees.

I suppose these are one time use only also huh?

Title: Torque spec - flywheel bolts
Post by: type53b_gtd on July 13, 2004, 10:54:33 am

Quote from: "DieselsRcool"

I suppose these are one time use only also huh?

They're supposed to be according to the later Bentleys - however, I've known lots who clean them up and reuse them with new threadlocker.  I have resuded them on occasion myself, but generally buy new ones.

Drew

Title: Torque spec - flywheel bolts
Post by: Mikeyworks on July 13, 2004, 04:24:20 pm

I tightened them properly....they're ready to roll....

I am now swapping out the seals and gaskets so I can get the whole thing back together.

I need to clean up and repaint the tranny while I have it out...and swap out the fluid with new good stuff.

I thought about pulling the whole block (especially after seeing some really nicely painted blocks) and painting it and getting it ready for as much show as I hope to get some go from it.

Mikey