Bolt crankshaft

[Rick007]

Hi forum,

Got my engine out and want to replace the front oil seal , but can't seem to get the bolt that holds the pulley of the crankshaft
It almost seems its tightened anti clockwise ...... Because it just doesn't budge in any way . I don't want to add any heat but running out of options .
Any tips out there ?

Greetings

[twistedtree]

It's a normal thread.  My first choice would be an impact wrench.  Otherwise you'll need to lock the crank from rotating, then use a long breaker bar.

[Jack Jones]

If the engine was still in the car, you can use the starter to loosen a front pulley bolt. You must have a socket on the front pulley bolt and use a long good quality breaker bar. Then you have the bar resting against the right underside of the frame rail using a piece of wood between to protect your painted surface. Disable the ignition system since the last thing you want is the engine to start. Use the starter in short bursts to free the bolt. I use this as a last resort and you must have a good understanding of the system before you try this. NOT FOR THE FAINT OF HEART! 

[ja17]

Hello,

Figure out how to hold the engine from turning by securing the flywheel. Lots of options back there. The factory makes a special tool of coarse. As mentioned a good strong impact gun is the quick and easy way, but you will still need to find a way to lock the engine for the final torque during re-assembly.

[Rick007]

Thanks guys , it's still a matter force then . Will get hold of a big bar and try it that way .
Btw I tried the impact gun ..... No luck there

[ja17]

Hello Rick,

There are impact guns then there are impact guns...........Your local Truck technician will have an impact gun which will do the job.

[wwheeler]

The bolt is torqued to 150 ft lbs. when installed. That should give you an idea of how tight it is. Who knows what torque it will take to budge it since it has been on for awhile.

[Rick007]

Yes got the bolt off finaly the big bar did the trick .  But now the pulley itself .....my Puller is just a bit to small ...pfffff
Thats the great thing with these cars , once you get around one problem the next one surfaces ...

Thanks for the tips gentleman .

[Eminent]

Well. I'm curious how you'll give it the final torque when assembled again.
How others did that?

[Benz Dr.]

It's easier than you might think. I use a 3/8 extension and jam it between the harmonic ballancer and the water pump housing.  Once I have it tight I turn the engine backwards a small amount and remove it. You can do the same thing to remove the screw although an impact gun wil usually remove them without too much trouble.
I oil the threads lightly and also the cupped washers which helps to make everything torque down nicely.