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Can you use old fan with spin on waterpump

Will L.

Will L.

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So obviously the spin on waterpump requires the spin on fanclutch.

Each time I have done it we put on the duramax fan blade, but I never compared the mounting.

Will the original fan bolt up to the clutch?

Thank you, oh great and wonderful 6.5 folks of knowledge.
 
If it's the 4 bolt fan, but the early fan blades I believe were 6 bolt(the ones used on 96 and older). I know I had to change fan blades to run the 97+ water pump and fan clutch as the early fan blade wouldn't work.
 
If you get the chance to check it, that would be great. I am in no hurry for it. Probably 2 months before I get into it.
Just trying to plan out how thin I have to spread my nickles. Even if going to a better fan later, I would hope to get away with running my current fan a while for $ reasons.

Also would like to do it as a direct comparison for hummers on just swapping waterpump and fanclutch keeping stock fan- then later compare better fan.
 
I dont know if it is the same as the trucks but I think so. 9 blade about 19" diameter. This is number on it:
IMG_1983.JPG
 
If you can bolt a Duramax fan to it then you have your answer on fans as the Duramax fan and 9 blade steel fan are the same circle and 4 bolt pattern.

Bolting up is one thing, but, the hub matching up is also important.

The larger diameter Duramax fan requires perfect engine mounts, trimming the shroud, or both. The oddball 6 bolt fan to 6 bolt fan clutch are both garbage. Everything else concerned here is 4 bolt fan mount including thread on clutches. Gas engines are a different diameter for the 4 bolt water pump clutch mount although some fans bolt up to the gas clutches. Some 6.5 four bolt water pumps have both the gas engine and diesel pattern. (Results of gas/diesel parts mixed up is not enough air flow overheating or burning up the fan clutches.)
http://www.thetruckstop.us/forum/threads/6-5-fan-and-clutch-diffrences.44664/
 
I lied. Mine is 7 blade. I was looking at a pic on my phone of a fan from a truck and confused it with mine. Just got back to my truck to look.

I dont have a dmax fan yet. Trying to rebuild the world with $20 is a pain, Haha.

Trimming the fanshround on a hummer is not the better answer. The fan is buried into it by design. I would have to cut the fan. The clearance of my fan to shroud, there is no way a 21" will fit. Maybe a 20", but that would be pushing it.
 
Yeah, in the gameplan. I'm also trying to findout what the updated fan (and maybe fanshroud) is on 99 (iirc) to 2004 H1 is. Might be an option that way.

Push comes to shove I can always go back to my original plan of the roof mounted secondary radiator. Trying to avoid my "creative engineering" on this one.
 
Will L. said:
Yeah, in the gameplan. I'm also trying to findout what the updated fan (and maybe fanshroud) is on 99 (iirc) to 2004 H1 is. Might be an option that way.

Push comes to shove I can always go back to my original plan of the roof mounted secondary radiator. Trying to avoid my "creative engineering" on this one.
Click to expand...
Yeah, we wouldn't want you to go Mad Max on us
 
Haha, too late. The other day parked in front of a restaurant, the waitress saw my hummer and gave me that nickname.

There is a guy with a hummer on the hummer forum that mounted the fan, fanclutch, and waterpump together on a shelf or in a vice. Then built a frame to hold his router. Turned on the router and turned the fan using the waterpump as a lathe would (to turn it perfectly centered. Said it cut the blade perfectly.

He is installing everything now and modifying his lower coolant line to accept the extra hose that used to go to the waterpump like the newer hummers that use the spin on pump.
 
Hey Will-
It was easier than that even. I put my router on the crossmember of the truck with the pump and fan mounted in the truck. A nice long 3 inch router bit and a wood clamp on the router to hold (as well as staying clear of the 25000rpm dismembering end and strapping it and putting my foot on it) it to the crossmember for (some) safety....Don't let your highschool shop teacher catch you doing this.
Spin the blade carefully through the bit and its like a massive makeshift lathe. Trial the shroud and cut more off if required.This pic was from just after I cut it. Picture the router sitting in the bottom right corner of the fan.
 

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@Sand holy smokes. I didnt realize that was what you meant! Thats the kind of stuff we need on youtube-haha.

I think your missing a cooling stack though. Check to see if it got stuck to the last prius your hummer had for lunch. I think I'll try my misunderstanding version on a vice. I'm not into pulling my stack again soon.
 
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