So the Hayden 3200 fan clutch is considered "Severe Duty"?

[c good]

What is the advantage or disadvantage of the "Severe Duty" rating? Will it affect gas mileage compared to my stock Behr fan clutch?

Amendment: 2002 Envoy, SLT 4x4.

Also, the factory Behr fan clutch still works perfectly. I just don't know how many miles is on it or if it's ever been replaced. I've owned the vehicle for 17 years and it has 205 k total miles.

While I'm replacing the water pump I thought it might be a good idea to replace the fan clutch while everything was apart anyways.

I have the new Hayden on my parts shelf as a spare if the Behr ever went bad.

So I'm wondering if I should just keep the old Behr or install the new Hayden. Thanks for any input.

 

[movietvet]

What is the advantage or disadvantage of the "Severe Duty" rating? Will it affect gas mileage compared to my stock Behr fan clutch?

Please put the vehicle info in your signature, so I don't have to go find another thread of yours that has your vehicle info in it........

 

[Mooseman]

Please put the vehicle info in your signature, so I don't have to go find another thread of yours that has your vehicle info in it........

It doesn't really matter since this fan clutch fits both the 4.2 and the 5.3 (and 6.0 if you're that lucky) up to 2007.

We do have a thread from the FAQ on this:

EV Fan Clutch Recommendations for proper operation

And looking at RA, the original Mahle/Behr is just a couple of bucks more than the Hayden so I would go with that one. I think the whole "severe duty" is just a marketing gimmick as most have that label on their clutches. Hayden used to be our go-to fan clutch, both EV and thermal, but has since been dethroned.

 

[movietvet]

It doesn't really matter since this fan clutch fits both the 4.2 and the 5.3 (and 6.0 if you're that lucky) up to 2007.

We do have a thread from the FAQ on this:

EV Fan Clutch Recommendations for proper operation

And looking at RA, the original Mahle/Behr is just a couple of bucks more than the Hayden so I would go with that one. I think the whole "severe duty" is just a marketing gimmick as most have that label on their clutches. Hayden used to be our go-to fan clutch, both EV and thermal, but has since been dethroned.

You would know the fan clutch fits both the 4.2 and the 5.3, up to 2007. But let's say he has a 2008 TB with a 4.2 and as you just said, the fan clutch could be different. I don't know this, so I want the info for any attempt to help. Putting the info in a signature takes care of this concern for not only myself but other members as well, that would be interested in helping and not guessing. Unless of course, I should just always skip over any thread when the info is not given?

As far as the label, "Severe Duty", that is kind of like you always see shocks listed as Heavy Duty and you never see Light Duty. Again, a marketing gimmick.

 

[dhanger]

Hayden used to be our go-to fan clutch, both EV and thermal, but has since been dethroned.

That must have been a recent development--when I did my PCM fan delete that was the fan clutch I got per your recommendation, and that's been no more than a year. What's happened? I haven't had any problems with it, although it's really noisy when cold but other than that it's been fine...

 

[Mooseman]

I don't think there's anything inherently wrong with the Hayden thermal but I think the startup roar and price has made it less desirable. There might have been something about the engagement speed too. I think I mentioned something in that thread about it.

 

[c good]

So...should I just reinstall the old Behr one and keep the Hayden for when the Behr fails? Or put in the Hayden and keep the old Behr as the spare?

I bought the Hayden a year ago just to have as a spare if/when the Behr fails.

I am planning a few trips this summer and was thinking for peace of mind having the new Hayden fan clutch. I also replaced the radiator, idler pulley, tensioner and pulley, upper and lower radiator hoses, along with new water pump that started this whole project.

 

[Mooseman]

If your Behr is original, I'd put in the Hayden. It will work fine, maybe work OK unless you're towing or in a very hot climate. The testing in the thread I posted showed that the Hayden would run at lower speeds than what is commanded by the PCM.

Post in thread 'Coolant system failure spiral.'

Sep 28, 2020

The hall effect wires were all OK so the PCM was getting an rpm signal. There is no provision for testing to see if the solenoid signal has continuity. The service manual says the fan clutch has to be 1000RPM off for 100 seconds to set the code.

We saw temps on the Tech2 of 125 Celsius (257F) and at the peak of the highest summit 130C (266F). The temp criteria is 132C (270F) for 10 seconds.

I've done a coolant system pressure check and a leakdown test on all cylinders. The head gasket is intact.

With the 1000RPM in mind I just did three sets of tests.

Idle, RPM=620
Command=0...

• JayArr

• 

 

[c good]

Hi Mooseman,
I do tow a small trailer on occasion. 2900 lbs. I do live in S Cal and travel in Arizona towing so it's hot. So it looks the Hayden doesn't keep enough rpm to move sufficient air under more demanding conditions? Is that a known problem with all of the 3200 series?

Did you reinstall your Behr and did it perform better than the Hayden.

 

[Mooseman]

My original EV clutch failed a long time ago and I have a thermal now, I think it was a Hayden or Four Seizin I had kept from the Saab. It's OK with my TB and it hasn't overheated while my son was towing his pop-up camper with moderate hills. No idea how it would do in your conditions though. That same clutch wasn't able to keep the Saab cool with the 5.3 towing our old 5k travel trailer on a flat highway in hot weather and the A/C on. Didn't overheat but did run hotter than normal.

I don't know why Haydens do this or if it's "normal" for them. It could be a "good enough" thing in how they build it but there is a difference in the build. The fins might not be big enough to dissipate more of the heat in the clutch making the silicone fluid thinner. It might be OK. If you look in that other thread, @TJBaker57 has a way to command the fan to 100% but it's just for a while and you have to keep hitting the button.

 

[c good]

I have decided to reinstall my Behr fan clutch. It works perfectly. Theres no need to install the Hayden at this point. It will remain on my spare parts shelf.