Author Topic: How did you remove your crank shaft bolt? (Read 5127 times)

Zoso · « **on:** September 15, 2006, 01:38:38 PM »

I don't have any air/imact tools and the block of wood/breaker bar/starter motor technique is a bit "shadetree" for my liking.

(from bp's wepage)

sheepdog · « **Reply #1 on:** September 15, 2006, 11:46:21 PM »

I took some angle iron (chunk of bed frame), cut a round slice out and drilled it for 2 crank bolts, my brother held that and I used a 2 foot breaker bar.

I am no fan of some of the shadier methods I have seen and this allows you to tighten as much as needed.

bmwman91 · « **Reply #2 on:** September 16, 2006, 12:10:59 AM »

http://www.m42club.com/forums/showthread.php?t=1188

OMGF!!!11 use teh search function n00b

Good luck. it is a bitch. Pay the shipping and you can borrow my tool lol.

Febi Guibo · « **Reply #3 on:** September 16, 2006, 07:39:26 AM »

the M42 one is like $48 ...I say, we buy it, and rent it to our loyal membership as an income-producer for the m42club... who's with me?!

(denis, you need these... tell your mom they're like, giant barbeque tongs or something)

ak96ss · « **Reply #4 on:** September 16, 2006, 08:36:09 AM »

The Sir Tools website is perhaps the LEAST user-friendly page I have seen in a looong time. But, if that $48 is correct, I may just buy one anyway. Did you call them to get that price?

Febi Guibo · « **Reply #5 on:** September 16, 2006, 11:21:26 AM »

my bad.. for sale pages here:

http://www.gprparts.com/brands/sirtools/bmw.asp

ak96ss · « **Reply #6 on:** September 16, 2006, 12:15:13 PM »

Cool, thanks - BavAuto has it as well for the same price, and cheaper shipping to us on the right coast.

dude8383 · « **Reply #7 on:** September 16, 2006, 02:39:13 PM »

Quote from: ak96ss

Cool, thanks - BavAuto has it as well for the same price, and cheaper shipping to us on the right coast.

is this on their website?

dude8383 · « **Reply #8 on:** September 16, 2006, 02:39:56 PM »

Quote from: Febi Guibo

the M42 one is like $48 ...I say, we buy it, and rent it to our loyal membership as an income-producer for the m42club... who's with me?!

(denis, you need these... tell your mom they're like, giant barbeque tongs or something)

LOL, yeh i do need one of these. but how is that tool going to help to get the crank bolt off?

ak96ss · « **Reply #9 on:** September 16, 2006, 03:00:23 PM »

Yes, it is on their website.

This helps by enabling you to hold the crank in place while you remove the bolt...

D. Clay · « **Reply #10 on:** September 16, 2006, 04:11:33 PM »

If that breaker bar - starter motor and 2X4 is too shadetree for you, how about the SirTools piece. The instructions say that it rests on the frame rail too.
In an infinite universe, there is always another way!
With the engine at TDC a hole in the flywheel lines up with a hole in the block. It's visible if you're standing on the left side of the engine compartment. Of course there's a special BMW tool for this but a bolt works too.
http://www.sirtools.com/bmw_tools.htm
Click the picture in the above link - it's the pin at bottom center. For me the 2X4 on the frame rail/starter motor is the way to go. It's what we call the "quick and dirty" here.

romkasponka · « **Reply #11 on:** September 17, 2006, 02:24:55 PM »

you do not need any tool, just fit bolt in flywheel through hole in block (close to part #7 http://www.realoem.com/bmw/showparts.do?model=AF91&mospid=47256&btnr=11_1960&hg=11&fg=10 ).

sheepdog · « **Reply #12 on:** September 17, 2006, 07:16:45 PM »

Quote from: romkasponka

you do not need any tool, just fit bolt in flywheel through hole in block (close to part #7 http://www.realoem.com/bmw/showparts.do?model=AF91&mospid=47256&btnr=11_1960&hg=11&fg=10 ).

That could be a big mistake if the bolt shears, and at 250 ft. pounds of torque, it very well could.

That was designed to find TDC of #1 cylinder, not hold the crank. If it were, BMW would not sell a tool for this purpose.

romkasponka · « **Reply #13 on:** September 18, 2006, 01:43:28 AM »

you can make same math and you will see what torque is not so big on bolt and after that you will see only litle bent bolt, but it'is far inough to shear it. Of course you can use 12,9 calass bolt..

sheepdog · « **Reply #14 on:** September 18, 2006, 12:56:05 PM »

Quote from: romkasponka

you can make same math and you will see what torque is not so big on bolt and after that you will see only litle bent bolt, but it'is far inough to shear it. Of course you can use 12,9 calass bolt..

With a high quality bolt, you may get away with it, especially if the crank bolt was not properly torqued.

However, you are playing with fire.