My2nd 69 442

If given the choice between the ACDelco 15-4947 and the Hayden 2747 Fan Clutch for an Air conditioned 69 442, which would you choose and why?
Thanks for any replies
Jerry

joe_padavano

Hayden sells standard duty, heavy duty, and severe duty fan clutches. The Delco looks like the Hayden standard duty unit. The Hayden 2747 is a heavier duty unit than the Delco. Neither one appears to be US-made. I'm pretty sure the Delco unit comes from Mexico. No idea on the other one.

MDchanic

By appearance, it looks like the AC is a light duty model, and the Hayden is heavy duty.

That Hayden number is the number that most people find works well on A/C cars.

- Eric

edit: darn, Joe.

76olds

I purchased a Hayden clutch for my 76, I forget the part number but, I seem to find oil on the fan blades even thou I wipe it off periodically. Its been on the car for one summer so Ill see if it continues to discharge oil.
That's my only experience with a Hayden clutch. Maybe others have seen this oil residue and will chime in on them.
Hope this helps
Eric

My2nd 69 442

Thanks for all input. Based upon your recommendations, I think that I will probally go with the Hayden 2747 fan clutch. With the seasonal highs here in Tucson, Az.of 100*+ the heavy duty will most likely fill my needs.
Thanks for your input
Jerry

BlackGold

Just remember that "heavy duty" is not always better. HD might simply mean that it's a little tighter when not engaged and thus able to spin a high-pitch fan a little faster under normal operation. That might be desirable in a hot climate.

But HD might also mean that the engagement temperature is set lower. This can be incredibly annoying, causing your fan to spin at full speed just because the coolant crossed some magic threshold, not because the engine's truly getting too hot.

My2nd 69 442

Thank you for your reply
I firmly believe that the heavy duty clutch will be to my advantage here in Arizona.
The annoyance noise factor can't be any worse than the one I took off. It sounded like the smaller of the jet engines that I used to work on in my younger years.

BlackGold

Your fan should not be making that much noise no matter which clutch you use, normal or HD, new or old. If the engine is running hot enough that it needs the fan spinning that fast under any but the most extreme conditions, then you need more cooling capacity (ie, bigger radiator) or there's something wrong with the engine. If the engine's not that hot, then the fan is engaged when it shouldn't be (ie, wrong fan clutch). Unfortunately, the fan clutch manufacturers aren't in the habit of specifying to us retail customers such nice things as engagement temp.

Mat Raniewicz

HAHAHA! Joe Padavano! Haven't seen the name in ... 10 years? Mat Raniewicz from Chile 468

As for the topic - muy muy heavy duty one I need down here - any recomendations? 468 in a 81CS

MDchanic

Hayden 2797 es muy muy fuerte.

- Eric

Mat Raniewicz

Thanks! Will look for one. Amazon? Jeggs? Summit?
Muchos thanks ;-)

BTW - there is still air in the upper rad hose between the rad and the thermostat housing... once I had a bleeder there ( Suburban 76 ?) what about Oldses? No such a stuff? No need or too expensive?

MDchanic

I found Amazon to be cheapest. Closer to Chile, too. Ha ha.

The 2797 will really blow your hair back.

There is no bleeding procedure for Olds that I know of, but if you park it facing uphill the residual air should come out.

Welcome to ClassicOlds.

- Eric

ps: Joe will be around any time, now...

Mat Raniewicz

Eric, thanks for you time and the info.
I will have a look at 2797. The app-check says it will not fit Olds Cutlas 1981, but the 260ci option is not listed, the 5.7 diesel is, but, AFAIK, there was not such an engine in Cutlass 81s... I have a year 68 455ci stuffed inside with a metal 5 blades fan. I guess the clutch is gone. Sorry for simple questions, but for more than .. 15? yrs I don't do anything on my cars, so i'm out of practice :-( .. would you advise switching to a Flesxfan? In a former quite spiced 358 I had one, 19", and never had a hot moment. Actual 468 spins slower usually. Brgds

MDchanic

Flex fans seem to be less desirable option, but if you've had one before and liked it, it could be a possibility.

I can't speak specifically about your arrangement, but the 2797 is thicker front to back (protrudes ahead of the fan) than the "lighter" clutches, so if your fan is right up against the radiator, it won't work.

- Eric

Mat Raniewicz

Good info, I'll go with the shorter one. Thanks a lot.

But first... I wil have to find why there is no spark out the coil ... grrr.. MSD6AL is powered ( red LED on )... have a nice day and keep warm ... ;-)

dream66

Found this thread in regard to fan clutches to help me decide what to buy for a 72 Cutlass 350. The clutch I have now free wheels easily enough by hand with the engine off but sounds like it is not slipping with engine running at all rpm's and mph's. You know...the howling sound like the fan clutch is locked up.

I'm planning to get the Hayden 2747 since I don't think I need the HD clutch. It's a good time to change it out since I'm replacing the A/C compressor due to a blown front seal.

Might as well replace the coolant thermostat while I'm at it. I don't think it's operating properly because from a dead cold start the car heater starts blowing warm air within 60 seconds.

Any suggestions that aren't covered in the previous posts?

Yellowstatue

If it's a hundred degrees down there, it's gonna blow warm air by default. The thermostat won't change the time that it begins to blow warm.

dream66

It was 45* outside.

Yellowstatue

If your thermostat is sticking and your engine is over heating, then you need a thermostat. Be really happy that your car is trying to keep you comfortable by dispensing warm air promptly.

Mat Raniewicz

This clutch is still fine and working. Once a fortnight, that is. With some luck ...