rockmike

On the 93 cummins is the clutch fan nut left hand thread? I had someone tell me it is,but it looks to be right hand to me.Just wanna make sure im going the right way before I destroy evean more parts on this wreck.


Thanks.

BearKiller

LEFT HAND THREAD

maybe368

This is correct, but don't think that all of this type of fans are, because they are not. My friend's mid 90s chevy is right handed. The easy way to tell is that the rotation of the engine will always tend to tighten the fan. When I reinstall them, I just put them hand tight and let the engine tighten it up. It is much easier to get off the next time...Mark

PapeCAT

And make sure to put a healthy helping of anti- seize compound on there when you replace the thing.

TJE

it would've nice to know this BEFORE i replaced the fan clutch a few weeks ago oh well i'll know better next time

PapeCAT

eh it just makes it a lot easier to remove the thing next time you need to...

RuralCruiser007

You haven't had a fan clutch come off after you stop the engine, have you? I used to do that until I had one come off. Now all of them are tightened up. Nothing worse than hearing a bad sound after you shut the truck off and antifreeze leaking on the ground. Look and find that the fan came off and went thought the rad.

http://www.lislecorp.com/uploads/pro...75DFBD76FA.jpg

http://www.lislecorp.com/uploads/pro...th_43300in.jpg

That is what I use now. Never have a problem with fan clutches anymore.

maybe368

I would think that the torque applied while running and starting would be at least equal to or greater than the torque applied when shutting down. Just to be sure I checked mine, that I hand tightened 2 to 3 years ago and it is still tight. How soon after you installed it did it come off? Mark

Douglas2

hey-Hey!!!,
The engine is not a seamless deliver-er of torque. The thing shakes back and forth enough to back off even a LH thread. Note that there is a damper on the crank to keep these pulses from exciting the crank at its self-resonant point and causing it to become two pieces of crankshaft...
cheers,
Douglas

maybe368

Maybe so, but mine has not backed off, I may have the only 100% balanced CTD on the planet. It's now for sale for 1 million dollars......

RuralCruiser007

It was during first shut down. I have heard of it happening to a few, not just Cummins. I work work as a mechanic in the automotive field and I feel the tool is a safe investment. For getting the nasty ones off, and making sure they don't come off after being put together.

maybe368

I have the tool and firmly believe in buying the correct tool and am I in no way recommending this to anyone. it is just what I do...Mark

Douglas2

Take a 2-party, out ov state check?
cheers,
Douglas

maybe368

As long as the forged signature is good!!!!!!!!!!!!!!!!! Have a good 1