2001 Chevy Blazer to Rover D1 (maybe D2 and others) fan clutch conversion -

Late 90's to early 2000's Chevy/GMC just happen to use a six inch size reverse direction fan clutch with same mounting thread as the Discovery water pump. Bolt pattern for fan is usable with stock fan if you drill out to enlarge the fan mounting holes slightly.

So you can use a junkyard fan clutch, even if no Rovers in your junkyard. About $10. $6 more for the fan.

But what about a bigger fan? I found one on a 98 GMC pickup, scribed and cut it down with snips to fit the Disco fan shroud, moved about 40% more air than stock.

Found a fan with larger blades on a 2001 Blazer, cut it down (both GMC and Blazer fans made out of nylon), and it moves about 10% more air than the GMC. A little noiser, you can hear it slightly when you are driving.

Have not run final mpg figures. Last fan lets my truck idle with AC on at 192F, before I was 207F. I'm running a 180 stat, scanner says 172 - 174 with no AC at 55 mph, 176-178 with AC.

Pix of comparisons to stock, the GMC pickup fan (black) and the Blazer fan (tan).

Just proves that you can fool around with fans and clutches on a budget, for testing or empty pockets repairs. Or repairs when you are a long way from a Rover clutch.

 

Nice! That Blazer fan looks like a good deal.

 

Man are you obsessed or what? LOL!!!

 

I wanted the coolest Disco around.... and I'm painfully cheap. Saw that the Ford Taurus 18 inch electric fans had already been written up. Would like to find an easy swap alternator, and a subsitute radiator. Pretty soon, the price of a new copper/brass radiator will be more than you would have to pay for an old Disco. Now for those guys out in the desert, seems like a roof rack could hold a remote radiator, which could be linked in by the heater hoses (water runs through there all the time, even with heat off). Run hoses up by one of those snorkles.

 

Hi guys new to the forum and I'll apologize for bringing up a long dead thread, but has anyone else some this conversion? I been doing some digging around and it looks like my d1 has an M8x1.25 thread pitch while the Chevy blazer has an M10x1.50 thread pitch. Is this info correct? I wanted to buy a new gm fan clutch for $30 instead of porking over the $175 for the lr one. Any further info will be beneficial

 

There should be a newer post than that, but i run a GM clutch fan on my D2.i dont remember the # i do remember having to buy bolts and having to open the bolt holes in the fan i size. There should be a better thread.