Yep. I say clutch or if you want to be fancy swap in an electric one. THe plus side of clutch fans is that if they fail they will still cool your motor.

Not always........

I've had them fail so that they turned so easily that the fan didn't turn fast enough to pull enough air...

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

The MP fans that are sold as "high efficiency" fans were actually the STOCK fans on 1980s slant-6 M-bodies. Believe it or not- check the part number stamped on the "MP" fan with a stock '82 slant-six M-body! They are efficient fans, so they're a great retrofit to older cars, especially muscle cars that tended to either have fixed fans or flex fans (power hogs).

What the clutch they sell with that fan might NOT work on is early A-body slant-6 cars that have very little roome between the radiator and the water pump. But the FAN itself will fit on a clutch with a short shaft that is made for an early A-body.

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"I've had them fail so that they turned so easily that the fan didn't turn fast enough to pull enough air..."


interesting. Every single failed clutch fan that I have seen has failed in such a manner that the clutch locked up solid thus making it effectively a normal fan. Noisy as heck, but it still cooled.

There's nothing such as a clutch made for an early A-body. Very few A-bodies got clutch fans, and none of those that did had six-cylinder engines...

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I've had 'em fail both ways. It's possible all of your applications in which clutches have failed have been equipped with a Heavy Duty Cooling clutch, which is designed to return to full-drive position at engine idle regardless of radiator draw-through air temperature (the standard type reacts only to draw-through air temp). The HDC type cools better at idle, but it tends to be in full-drive position more often, thus increasing by simple odds the likelihood of failure in that position. Plus, the mechanism that returns it to full-drive at idle adds a potential failure point, such that a failure in full-drive is more likely than a failure in no-drive.

But yeah, I have had fan clutches fail in no-drive. Last one I can recall at the moment was on an '84 Chev Crapiece Classic.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

How much of a difference would a clutch fan make on a stock slant six that currently has the 6 blade fan (A/C). Would the horsepower/torque increases be enough to notice?

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

Actually there is a big difference. I ran my Valaint for years with no fan....till last week when the boys who are freeked by such things installed a 6 blade fan off a 318 Satellite. The loss of power is quite noticeable.....but they would rather it cooled easily....KIDS!

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Yeah....Im the one who destroyed this rare, vintage automobile.....

I haved used this one very successfully on various cars, and it doest suck the power that a steel blade one would either. It has to be this one though---the other ones with the smaller blades just dont cool---especially in the summer.

http://www.jegs.com/webapp/wcs/stores/s ... &langId=-1

--chad

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74 swinger slant 6, the slowest, most fun car i have ever owned.

Sandy, ever the rebel. I love that your kids have to reel you in...thats great.

u really ran i t with no fan at all

doesnt it run way hot just idleing in traffic?

We never idle in traffic (I live 2.5 hours and a ferry ride from the nearest stoplight) Since I upped the ante with the new upgrade motor it runs a little hotter when you run the piss outta it up long hills. Since its snowboard season the boys are always climbing big hills at low speeds. They freeked and added a WAY too big fan. (6 blade steel flex)

I ran it for 4 years with no fan and only overheated once. (logging road with waterbars....18% grade)

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Yeah....Im the one who destroyed this rare, vintage automobile.....

Which is why I said "made for" not "originally on." Aren't there short enough clutches available aftermarket? I thought I recalled seeing that discussed on this very forum.

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None that I've ever found that would allow the installation of an American-style "clutch in front of fan" setup in a slant-6 equipped A-body before 1966 (and even then, only on certain '66 and up cars, depending on engine placement and radiator selection). Hence the extreme (relatively speaking) solution of going to e.g. a Mercedes "clutch embedded in fan blade" setup.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.