Engine/Transmission (1998.5 - 2002) I need a 36mm wrench to change fan clutch!

[BIG BOB]

I need to change my fan clutch on the White Obsession. A crescent wrench is too wide. It takes a 36mm wrench.



The Manual give two part numbers they are probably thinner;

Snap-on #SP346 or

Cummins #2017DSP



According to my measurements I can use a wrench up to a 1/2" wide or thick.



Does anyone have one of these? I would like to borrow it if you have one. I will pay for the shipping both ways.



Thanks for you help.

 

[Koa Man]

You can use a 1 7/16 or 1 1/2 inch wrench also. I used the latter since I did not have the correct size. Little sloppy on the fit but it will work. Some guys have used a long drift and whacked it at the corners of the nut and it loosened up. You will need to use something to prevent the pulley from turning. I used a strap wrench for that since I did not have the barring tool either.



You can also buy the wrench from Sears and take it back after you are done for a refund. I don't mind taking advantage of Sears since a $100 torque wrench went bad with very little use after their 90 day warranty period was over... . no refund or exchange.

 

[78repowerwagon]

I have a KDP jig which has the tools you need in it. I can send the wrenches to you if you haven't found any yet.

 

[bighammer]

Doesn't the (big)hammer and drift method work? I thought I needed a special wrench, but a hammer and a scrap of steel bar worked well. Just hammer on the edge of the nut to loosen it. (remember it's a left-hand thread)

 

[Boldt's Wagon]

Big Channel-Locks work too.

 

[illflem]

Air impact chisel with a blunt tip on the right side of the nut flat will take it right off.

 

[dremelts]

Originally posted by BIG BOB

I need to change my fan clutch on the White Obsession. A crescent wrench is too wide. It takes a 36mm wrench.

Big Bob - I used a crescent wrench when I took the fan off to do the KDP. I just removed several of the small screws that attach the hub to the fan clutch.



Just don't forget that the big nut is left-hand thread.

 

[PHaller]

I made one from a 24 inch long piece of 1/4 mild steel plate about 3 inches wide. I just hack sawed out 1 7/16 out of it. Worked great but you'll need something to hold the pully with. I used an 18 inch pair of channel Locks.

-Paul R. Haller-

 

[Rockcrusher]

As mentioned, a punch and hammer worked great on my '90 CTD.

 

[lgibson]

I bought a set at NAPA for mine. I can't remember the price, but it wasn't too bad. It cam with a thin wrench and a thin "crows foot" type to hold the pump. I am in the Salem area and I can send it to you if you need. Just PM me the address and I will get it out in the mail, overnight if you want it soon.

 

[BIG BOB]

Thanks everyone for your help and suggestions. I didn't think about a hammer and punch or a air hammer. I think I will try those before I ask someone to send a wrench.



Probably won't be until this weekend before I can get to it.



Thanks again!Oo. Oo.

 

[Vaughn MacKenzie]

Bob, do you think your fan clutch had some to do with your problems of running too warm on your trip?



Piers mentioned to me the 12-valve radiators are copper while ours are aluminum. Copper cools better, but the radiator shop I just talked to said the aluminum ones cool just as good and recommended sticking with it. (they also mentioned they rarely see a Dodge Cummins come in with radiator problems with less than 150k where as the HD Chevy and Fords often fail as soon as 60K)



Vaughn

 

[BIG BOB]

Vaughn,



I don't remember hearing the fan kick on while we were on vacation. It could very well be the problem. We'll find out Saturday when I change it.

 

[rickandcheryl]

Bob, where did you purchase the new fan clutch and what did it cost? Thanks, Rick

 

[BIG BOB]

rick,



I bought it at an auto parts store in Spokane, the name is Bert Sheilds Auto Parts. It's not a major chain, only one store.



I called NW Cummins, they didn't have one, called Napa, they didn't have on and wanted $139 for it. I called Bert Sheilds and they had on for $70. I jumped on it!

 

[RKohn]

Cheap Wrench...

Go to the local hardware and get an adjustable spanner made for the nut on sink drains. Mine cost $5. 97.

 

[BIG BOB]

I Got It! Thank guys for all your suggestions and help! I took Rockcrusher suggestion, only I used a steel flat bar about 2' long and a 3# maul! I didn't think I was making any headway, but I turned the fan and it screwed right off.



This is what I love about the board, everyone help and suggestions!



Vaughn,

I'll know over labor day weekend if this cures the overheating problem while towing. Kathy and I want to get away for a 4 day weekend with the travel trailer, just got to figure out where to go.



Thanks again, Big Bob