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View Full Version : SerIII bellhousing Torque Specs


slorocco
12-05-2011, 10:45 PM
Anyone know the torque specs for the large bolts that hold the series bellhousing to the tranny? Had to swap out the 6cyl bellhousing for a 4cyl one and need to re assemble everything.
antichrist
12-06-2011, 07:31 PM
Tight. ;)
Land Rover didn't provide torque specs for them.
I'd measure them and torque accordingly.
slorocco
12-06-2011, 07:39 PM
Thanks. I won't waste any more time looking. Good and tight will do.
SafeAirOne
12-06-2011, 07:42 PM
Just use the standard torque specified for that size/thread pitch bolt:

http://www.engineershandbook.com/Tables/torque.htm

EDIT: Sorry it's probably Whitworth if it's on the transmission, right? Here's that chart:

http://www.engineershandbook.com/Tables/torque4.htm
slorocco
12-07-2011, 06:19 AM
Never even though about that. Good idea! Thanks.
antichrist
12-07-2011, 08:54 AM
Mark,
Yeah, that's what I meant by "torque appropriately."
SafeAirOne
12-07-2011, 09:30 AM
Mark,
Yeah, that's what I meant by "torque appropriately."

That's what I figured, but I don't think it caught on with everyone... :)
westcoastkevin
12-07-2011, 10:48 AM
Those torque numbers are for the bolts. If the bolts are going into aluminum alloy castings, then the castings strip before the bolts do. Just go with goodandtight.
SafeAirOne
12-07-2011, 03:40 PM
Those torque numbers are for the bolts. If the bolts are going into aluminum alloy castings, then the castings strip before the bolts do. Just go with goodandtight.


That's a good point....
slorocco
12-07-2011, 03:54 PM
That's what I figured, but I don't think it caught on with everyone... :)

I'm a bit slow until hit between the eyes with a 2x4.

Good reminder about the steel bolts vs aluminium transmission case. 3 are bolts and nuts, the 4th is threaded into the aluminium case.
antichrist
12-08-2011, 08:04 AM
There's a chart somewhere on the net with torque figures for steel in to threaded aluminum.
deezgunz
12-08-2011, 03:03 PM
I just changed a rear seal and clutch. Good and tight is the way to go. I used the bible torque spec and turned the heads off the bolts. Thankfully when I removed the bell housing there was enough left on the bolt shaft to take it out with vice grips.
antichrist
12-09-2011, 02:01 PM
Sounds like you had weakened bolts or there was a SPOT of using grade 2 bolts at some point.