Loctite crankshaft pulley bolt ?

petespieces · 5th June 2012, 11:21

Hi folks.

Should I Loctite the crankshaft pulley bolt ?

1.8 auto

Thanks

Pete

T16 · 5th June 2012, 11:57

I cannot speak for the 1.8T, but the huge M18 bolt that holds the diesel crank pulley on is tightened in three torque angle stages.

This means that its a stretch bolt, and if loctite was used on it, you would probably never, ever get it out again, due to the huge amount of torque needed to shift it.

I would guestimate it took about close to 650Nm to get mine undone without threadlock.

If the re-fit instructions for the 1.8T bolt are in angled stages, then no, I would never, ever fit it with threadlock.

marinabrian · 5th June 2012, 22:32

Quote:

Originally Posted by petespieces

Hi folks.

Should I Loctite the crankshaft pulley bolt ?

1.8 auto

Thanks

Pete

In one word NO
Simply not required Pete

Brian

hinged_bap · 5th June 2012, 22:48

i had my bottom pulley changed and the bolt was so tight it sheared off the 1/2 square drive of a quality adapter.

T16 · 6th June 2012, 01:56

Lol 1/2" drive!!!

Doesnt even come close!

Torque on this level needs a 3/4" at the absolute minimum, preferably a 1" to stop any flex in the breaker bar, if thats what you are using.

Ive actually got a modified OEM crank pulley holding tool, as the torque is so much that you risk shearing teeth off the ring gear should anything slip.

The morons at MG changed the spec of the bolt and washer, which meant the official BMW tool no longer fitted correctly. The "new" bolt had a taper and the washer was about twice as thick, meaning the tool wouldnt actually fit unless the centre was machined out to take the extra size of the new bolt/washer.

petespieces · 6th June 2012, 05:19

Thanks folks, NO it is then

5th June 2012, 11:21	#1
petespieces Gets stuck in Rover 75 Saloon 1.8 auto Join Date: Mar 2012 Location: Le Theil de Bretagne (France) Posts: 661 Thanks: 36 Thanked 37 Times in 29 Posts	Loctite crankshaft pulley bolt ? Hi folks. Should I Loctite the crankshaft pulley bolt ? 1.8 auto Thanks Pete

5th June 2012, 11:57	#2
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	I cannot speak for the 1.8T, but the huge M18 bolt that holds the diesel crank pulley on is tightened in three torque angle stages. This means that its a stretch bolt, and if loctite was used on it, you would probably never, ever get it out again, due to the huge amount of torque needed to shift it. I would guestimate it took about close to 650Nm to get mine undone without threadlock. If the re-fit instructions for the 1.8T bolt are in angled stages, then no, I would never, ever fit it with threadlock.

5th June 2012, 22:48	#4
hinged_bap Gets stuck in 75 CDT Conn SE Auto saloon Join Date: Jun 2010 Location: Southampton Posts: 773 Thanks: 134 Thanked 104 Times in 81 Posts	i had my bottom pulley changed and the bolt was so tight it sheared off the 1/2 square drive of a quality adapter.

6th June 2012, 01:56	#5
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	Lol 1/2" drive!!! Doesnt even come close! Torque on this level needs a 3/4" at the absolute minimum, preferably a 1" to stop any flex in the breaker bar, if thats what you are using. Ive actually got a modified OEM crank pulley holding tool, as the torque is so much that you risk shearing teeth off the ring gear should anything slip. The morons at MG changed the spec of the bolt and washer, which meant the official BMW tool no longer fitted correctly. The "new" bolt had a taper and the washer was about twice as thick, meaning the tool wouldnt actually fit unless the centre was machined out to take the extra size of the new bolt/washer.

6th June 2012, 05:19	#6
petespieces Gets stuck in Rover 75 Saloon 1.8 auto Join Date: Mar 2012 Location: Le Theil de Bretagne (France) Posts: 661 Thanks: 36 Thanked 37 Times in 29 Posts	Thanks folks, NO it is then