HELP!! Left tool on crank pulley and it REMOVED the bolt when I turned on the car! - Page 3 - PeachParts Mercedes-Benz Forum

vstech · #31 05-05-2008, 08:59 AM

Quote:

Originally Posted by pawoSD

With my tools I can get it to 150-160ish ft/lbs....still 40ish away from where it needs to be.

I see I can get the torque wrench I need on Northern tools for like $70.....however, that doesn't solve my problem of how I keep the engine stationary while torquing it....I want to be able to do it without removing anything else (namely crank pulley)......and I'd really like to not have to remove the starter either.

see post #13....
HELP!! Left tool on crank pulley and it REMOVED the bolt when I turned on the car!

winmutt · #32 05-05-2008, 10:03 AM

Quote:

Originally Posted by kerry

If I'm not mistaken, that bolt takes 200+ foot pounds. You want to make sure it is tight given the problems that occur with the pins on the crank sometimes. MB does sell a tool for locking the flywheel in place while tightening that bolt I think. Don't know if a screwdriver in the flywheel can hold 200+ foot pounds.

At least you're now familiar with the easiest way to loosen it.

I find it hard to believe that the starter can put out 200ft lb.............

tangofox007 · #33 05-05-2008, 10:43 AM

Quote:

Originally Posted by winmutt

I find it hard to believe that the starter can put out 200ft lb.............

Diesel starters typically exceed 200 ft/lbs. But it's not just the starter torque that counts, it's the torque at the crankshaft. The starter/flywheel gear relationship must be considered, also.

winmutt · #34 05-05-2008, 12:49 PM

Quote:

Originally Posted by tangofox007

Diesel starters typically exceed 200 ft/lbs. But it's not just the starter torque that counts, it's the torque at the crankshaft. The starter/flywheel gear relationship must be considered, also.

Oh ah yes I didnt think about that part.

Hatterasguy · #35 05-05-2008, 04:09 PM

Just jam the fly wheel.

bgkast · #36 05-05-2008, 04:17 PM

Swap in a manual transmission.

pawoSD · #37 05-05-2008, 06:09 PM

Quote:

Originally Posted by Bajaman

I hate to admit it, but I did the exact same thing a while back. I just finished setting the valve clearances, and buttoned everything up. I started her up and heard a strange clicking from the front. I immediately shut it down. Luckily nothing was damaged. A real wake-up call!!!

Just jamb a punch in one of the holes of the flywheel (there are six big ones) and tighten it down. Probably take less time than taking it to the dealer, and a lot lighter on the pocketbook.

How do I get to these holes?

barry123400 · #38 05-05-2008, 07:00 PM

I gave this a little though. Again for me a dangerous thing. If one were to apply say a hundred pounds constant air pressure to a cylinder either through the glow plug hole or injector hole.
With the piston at bottom centre. And the valves still closed even if it meant backing off the adjustment on the valves for that cylinder. It could easily resist your heavy torque application on the bolt. This could be used for removal of the bolt as well I imagine. Quicker and easier for me than pulling the starter on a 617. Just a thought.

pawoSD · #39 05-05-2008, 10:25 PM

I managed to jam a 6" socket extension into the pulley from behind...so it jammed against the block and held it solid. I applied force with my torque wrench up to 110lbs....then I moved it up to 150 (max)....then I adjusted the wrench well beyond maximum..... (it goes quite a ways past 150) and got it to click at that setting too(that was NOT easy!)....then I clicked it, and gave one huge Yank on it, and called it good.....its gotta be around 200ft/lbs with that much force. So it is all set. Wshew. Disaster averted, and huge expense.