Cooling Fan upgrade

[thehackmechanic]

How about 156mm?

Sfdon, there's a 156mm pulley on eBay from an '89 E24. Is slightly bigger slightly better? It'll clock it faster, correct?

 

[sfdon]

They only used the 156 for a short while- until april 1987-

02 Pulley D=156MM 1 04/1987 11231706725 $224.93
02 Pulley D=142MM 1 04/1987 11231716270 $177.35

http://www.realoem.com/bmw/showparts.do?model=GB43&mospid=47359&btnr=11_0303&hg=11&fg=20&hl=5


Hard to find, and you may need a later dampner so that it will fit.
I think I would stick with the 2nd gen which is 14% bigger.
124mm original, 142mm later "clocked" version.

 

[sfdon]

Looks like the 156 pulley was a 1 year deal for ac cars.......

http://www.realoem.com/bmw/showparts.do?model=5374&mospid=47205&btnr=11_0299&hg=11&fg=20

 

[kasbatts]

electric fan

While we're talking cooling fans, is there anyone out there running an electric fan only?
this is my intention unless you guys can give me good reason not to. (added advantage of a couple of extra HP

 

[Jan Gullett]

M5 Pulley

If upgrading the fan, you might want to consider the m5 pulley. Details of my cooling set-up are here: http://www.e9coupe.com/forum/showthread.php?t=9602&highlight=Zionsville&page=2

 

[30csl]

I got going on version 3 tonight and fell at the first fence. The pump I ordered has offset mounting holes drilled whereas the pump on the car has equally spaced holes. Did I order the wrong pump or do I need a different pulley?

Thanks,

Rohan

 

[30csl]

 

[Layne]

I got going on version 3 tonight and fell at the first fence. The pump I ordered has offset mounting holes drilled whereas the pump on the car has equally spaced holes. Did I order the wrong pump or do I need a different pulley?

I have the opposite problem. I'd trade pumps with you if you weren't across the Atlantic. The pump I have appears to be new and has equally spaced holes, so I assume the one you need is available. I'm just going to drill additional holes in the pulley.

 

[aearch]

use your existing connections w/ the 9 blade just grind down the mount housing just so the blots are clear and use the m5 pulley
ill poist pic in the morning
here it is theres a whole inch of clearance

 

[aearch]

used the oem pump w/ equal sq holes
get the other pump simple and clean
also have triple core radiator from the oem one
just add another row

 

[30csl]

Hi Alan, I'm on the 11 blade now which needs a threaded male stub on the water pump. I need to get a later pulley or resting this one it seems. Not sure what your photos above are showing or if they are for my benefit?

Nice engine!

 

[30csl]

Hi Layne, does your pump have a part number I could then search for?

Thanks,

Rohan

 

[Layne]

Hi Layne, does your pump have a part number I could then search for?

Thanks,

Rohan

I believe it's just the standard E9 part. It does not have the threaded stub for your 11 blade fan, one reason I went electric-only. I doubt that any pump exists with the threaded stub AND equally spaced holes, but I don't know that for sure.

 

[aearch]

i have a water pump w/ the threads
and pulleys ill send pics

 

[30csl]

I guess I'll grab a pulley to match or drill this one. Half tempted to put the original back on!

 

[aearch]

i have a pump w/ threads and pulleys i post pics

 

[Markos]

Our member CS Specialist still has a few red 9 blades for sale...

 

[30csl]

Well guys, I put the 5 blade back on tonight. The clearance is tight suggesting none of the upgrades will work for me. My old clutch worked fine when tested. I have the black 9 blade on my other car and it works but is very tight!

 

[Stevehose]

you can lock the fan on with a couple longer bolts if need be.

 

[30csl]

Hey Steve, yes good point, for now it's working nice but I expect it to fail!