Crankshaft pulley nut

[Bruce Coen]

I can't get it to budge !

I'm pretty sure that it isn't left hand thread, correct?

Is it kosher to use an impact wrench on it?

The engine is out of the car.

Thanks,

Bruce Coen

[Glenn Ring]

Lefty Loosey.

Impact gun will get it done.

[Ron LaDow]

Bruce,
It is RH-threaded. You can fasten a bar to the flywheel to keep the crank from moving, but an impact works, too.
Thanks,
Ron LaDow

----- Original Message -----
From: "Bruce Coen"
To: 356talk@356registry.com
Subject: [356Talk] Crankshaft pulley nut
Date: Mon, 4 Aug 2008 14:02:34 -0700


I can't get it to budge !

I'm pretty sure that it isn't left hand thread, correct?

Is it kosher to use an impact wrench on it?

The engine is out of the car.

Thanks,

Bruce Coen

------------------------
Bruce Coen
'56 Cabriolet #61066
'59 Coupe #105158




Thanks,
Ron LaDow

Post generated using Mail2Forum via email.

[Guest]

Bruce,
It is the standard right-hand thread. The normal torque is
about 350 ft/lbs. but most people use a long bar so it could
be on way beyond.

Alan

Bruce Coen wrote:

I can't get it to budge !

I'm pretty sure that it isn't left hand thread, correct?

Is it kosher to use an impact wrench on it?

The engine is out of the car.

Thanks,

Bruce Coen


------------------------------------------------------------------------

Bruce Coen
'56 Cabriolet #61066
'59 Coupe #105158




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[Glenn Ring]

Bruce,
It is the standard right-hand thread. The normal torque is
about 350 ft/lbs. but most people use a long bar so it could
be on way beyond.

Alan

Bruce Coen wrote:

350ft-lbs?????

We're talking about the pulley, not the flywheel.

[Ashley Page]

mistake post

[Ashley Page]

I have one of the Porsche engine stand adapters with the 4 tubes coming out to the half circle piece that bolts to the engine case half. It fits in my engine stand in place of the standard engine stand adapter that the engine stand came with. If you have this part then get a long pipe.

I have a piece of 1 1/4" tubing that is 7 feet long and another that is 4' long. I put the 7' piece through the tubes on the Porsche engine stand adaptor and let the end rest against the floor. I rotate the engine until the 7' piece of tube is held in place by the tubes in the engine stand. The 4' piece goes over my 3/4" breaker bar. I set this up so that I am pushing down on the pipe to loosen the nut. I also have a nice flywheel lock.

I know my tubing lengths are overkill but with all that lashed up, actually loosing the pulley nut or the flywheel nut is a non event; no matter how much red loctite is on it. It takes all the work and stress out of it. Meanwhile, it just stands up in the corner waiting for the next tough nut to crack.

[Bruce Coen]

Thanks guys for all of the help.

I had to go out of town for a couple of days for work so I put some of Bud's favorite "loose juice" (Gibbs) on it to soak while I'm gone. I'll get back on it this weekend when I get back home.

Thanks,

bc

[Bruce Coen]

Thanks for all of the help guys. Even my impact wrench wouldn't budge the thing until I applied a little heat. After I heated it up a little bit then it buzzed right off.

THEN, the pulley didn't want to come off !

In any event, the new seal is installed and the job is almost done except for one thing:

We are talking about the fanbelt pulley here, not the flywheel nut. I couldn't find a torque specification for this in any of my books including the factory workshop manual and Elfrinks.

I think that someone mentioned 50 ft/lbs ?

BTW, I bought a "Torque Dude" for the flywheel end and that part of the job was a whole lot easier than the pulley end.

Thanks again for your help,

bc

[Mark Sabbann]

My B/C workshop manual lists the impeller nut torque at 72.5 ft-lbs, page E20. It's the same as listed for a Super 90 engine on supplemental page SE17.

[Albert Tiedemann]

The torque spec for the crankshaft pulley--not the gland nut for the flywheel or the impeller nut for the fan is not a well documented fact.

Use 45 ft-lbs. Others like Dick Weiss may second this value. Likely it was installed previously with an impact wrench and with right hand threads and rotation and all that stuff...... hard to get off.

I once had one so tight that it required the use of a 1 inch drive, air impact tool and heat. It ran the compressor down a few time requiring only a few huffs to start the compression cycle again. But this was when I was .....err much younger and could actually lift a 1 inch drive air impact tool.

[Bruce Coen]

The torque spec for the crankshaft pulley--not the gland nut for the flywheel or the impeller nut for the fan is not a well documented fact.

Use 45 ft-lbs. Others like Dick Weiss may second this value. Likely it was installed previously with an impact wrench and with right hand threads and rotation and all that stuff...... hard to get off.

I once had one so tight that it required the use of a 1 inch drive, air impact tool and heat. It ran the compressor down a few time requiring only a few huffs to start the compression cycle again. But this was when I was .....err much younger and could actually lift a 1 inch drive air impact tool.

Thanks Ab,

The fact that you had a tough time getting one of these loose makes me feel a little less incompetent.

Pretty soon the engine will go back in, safely secured by my special Ab Tiedemann engine bolts !

Thanks,

bc