I need help with crank pulley bolt

[2.9._ranger]

I know many people have asked this but my scenario is different, my engine is out and dismantled all the way don't to the block crank and pistons, I need to take the crank pulley off so I can remove the timing cover, I can't get the crank pulley bolt loose without rotating the engine backwards does anyone know how I can stop it from spinning?

 

[tw205]

If manual trans, put it in gear. Automatic, pull the starter and wedge the flex plate.

 

[alwaysFlOoReD]

You can try an air or electric impact wrench of sufficient torque capacity.
Or a hammer wrench.

 

[2.9._ranger]

You can try an air or electric impact wrench of sufficient torque capacity.
Or a hammer wrench.

What do you think would be sufficient capacity?

 

[Snoranger]

Assuming the engine is on an engine stand…
Put 2 flywheel bolts back in, put a piece of metal between the bolts so it hits an arm of the engine stand. Unbolt the crank pulley bolt.

If the engine is not on a stand…
Put a bellhousing bolt back in and have the metal hit that instead on the engine stand arm.

 

[alwaysFlOoReD]

No idea. You'll know when it comes off... Lol. Just a suggestion to try since you have the engine out. If its on an engine stand try to figure out a way to prevent it turning. If the flexplate or flywheel is on maybe you can jam a screwdriver in somewhere, or visegrips clamped so it jams while turning. Pics would help.

 

[svtcards]

If manual trans, put it in gear. Automatic, pull the starter and wedge the flex plate.

I tried that with a manual once and it still spun over

 

[Curious Hound]

I tried that with a manual once and it still spun over

Besides that, he already has the transmission separated from the engine. He can put the Trans in any gear he wants and it won't do a bit of good for this task.

 

[bcschief]

Impact wrench is the best way, Harbor Freight sells a corded 1/2-inch drive impact that will do it.

 

[Josh P]

Impact wrench is the best way, Harbor Freight sells a corded 1/2-inch drive impact that will do it.

That corded impact is useless. You could oil up the threads on head bolts, spin them in with 2 fingers and it still wouldn't back them out.

 

[Uncle Gump]

Or buy a flywheel turner...

 

[pjtoledo]

"poor mans impact" I've used it a couple times.

does not need crank/flywheel secured.

get a boxed end wrench for the crank bolt, or socket & breaker bar if it's recessed. no ratchets!

place wrench on bolt so it points to the left., use a good piece of rope and tie the wrench so it can't fly more than a few inches.

pre-tension the wrench, bungie or whatever.

use a 2 foot piece of hard wood and smack the hell out of the wrench, must be a very fast swing.

hint: keep face farther away than the rope is long.
you can have an assistant hold a broom handle/pole against the wrench for a less dramatic event. still need the rope!

 

[bcschief]

That corded impact is useless. You could oil up the threads on head bolts, spin them in with 2 fingers and it still wouldn't back them out.

Mine worked fine.

 

[Shran]

Mine worked fine.

I would agree with this... the current model Bauer corded impact is pretty good. Torque Test Channel on Youtube tested them and were able to get about 600ft/lbs max torque out of it and that is in par with a lot of air impacts - I think it actually scored higher than my old Earthquake impact - and that thing laughs at crank pulley bolts.

Now if you are talking about the cheapo old corded impacts... yeah, Josh is probably right. I have a DeWalt 1/2" corded impact that is about 20 years old now and it struggles with car & light truck lug nuts. Other knockoff brands of that style are even worse. In its day it was decent but we knew its limitations.