Ok now my ? is why wont the fan pull enough air to keep a/c pressure under control until the truck is fully warmed up? btw on 3rd fan clutch

 

Because you live in AZ and anywhere else things would be functioning fine....(just being a smart a$$)....

Are you running a shroud?

I've also heard that the factory clutches have the lock up temp set a little to high. Someone mentioned a 2nd or 3rd gen clutch that has a lower temp setting within the clutch assembly. So it will lock up at lower temps.

 

I bought a updated clutch it hepled a lot but i need a better radiator

 

I had problems also till I installed a new condensor no more trouble since then.

 

I've seen condensers that looked OK at first glance, but the fins were completely separated from the tubes by a layer of corrosion. This might be your problem.

 

Try an OEM dodge clutch expensive but when it locks in you can tell. Also idle could be low.

 

FYI, the 2nd gen clutch is a little stouter than the 1stgen clutch, due to the heavier weight of the fan on the 2nd gen.

Trying to run a 2nd gen fan on a 1st gen clutch might be more than the clutch will handle, weight wise.

For the record, a 1st gen fan has aluminum blades with NO reinforcing ribs pressed in, a 2nd gen fan has steel blades WITH a reinforcing rib.

If you use a 2nd gen clutch on the 1st gen fan, CAREFULLY examine the blades for fractures, as the 1st gen blades have been known for cracking off near the fan's hub.
Putting a tighter clutch on there may exacerbate the problem.

Mark.

 

I keep reading all this stuff about the 1st Gen. fans having aluminum blades.

I just went out and put a magnet to the blades on several 1st Gen.s sitting in the yard, a few spare engines sitting on pallets, and several extra 1st Gen. fans hanging on nails on the shop wall.

These trucks/engines/fans range from 1989 non-I/C to 1993 I/C.

The magnet stuck to every last one of the blades and also all the centers; I didn't run across an aluminum one in the bunch.

What gives ???

 

I gave up on fan-clutches years ago.

I only run a fan-clutch in winter, and then only on account of the front being covered a lot of the time.

For years, I have been running pinned clutches, thus making them direct-drive, pulling full fan-pulley RPM.

The best a clutched fan can hope for is about 80% of RPM with the clutch fully engaged.


I recently discovered a source for direct-drive clutch-eliminating fan hubs that fit these engines.

Of course, a different set of blades is required on account of these hubs having standard fan bolt-pattern, instead of some Dodge-specific won't fit nothing else pattern.

I put my hundred or so dollars in the mail last Thursday and am anxiously awaiting it's arrival.


My original intentions were to install a double set of electric fans; but, alas, there is in-sufficient space between the radiator and engine accessories for an electric fan to clear, hence my decision to invest in the direct-drive hub.



At the A/C shop, on the wife's truck, the guys tried four or five brand-new clutches from NAPA and didn't get a keeper in the bunch.

They called me and told me that I needed to come out there.

When I arrived, they told me of their dilemna and that their A/C work was gonna be wasted if a working clutch was not found.

I asked them what they did with the original old clutch and they fished it out of the dumpster.

I left with them wondering just what I had up my sleeve.

When I returned with the old clutch freshly pinned solid, they couldn't believe what they were seeing.

They installed it, cranked the engine, set the A/C on MAX, and watched the windows ice over.



My next project is to add big pushers against the fore side of the condensors for maximum cooling at low engine RPM.

 

My mistake.
This applies to the '91.5-'93 Intercooled engines, of which many have had the fan replaced.
The BLADES are aluminum, the part they attach to is steel.

The giveaway is that the aluminum blades, on the '91-1/2-'93 fans, are basically flat, with no embossing rib.

The steel bladed fans, on '94 and up, have a raised semi-circular strengthening rib.

The non-intercooled fans have shorter blades with a wider face.

Mark.

 

I have also discovered that the non-I/C blades are about 19.5" and the I/C blades are about 22-inches.

 

the other day i was towing about 4000 in the pa hills with A/c on and the clutch fan came on and i could hear it in higher rpm's and temp gauge was kinda under the middle, it usually sits at about 1/4. the temps were at 1/2 gauge the whole ride pretty much.

Then i got to the previous owners house and he told me about 6 years ago he was driving it and the fan locked up 100% and sounded like a boeing 747 taking off and the truck was doggy, then it unlocked and never worked since then. well it sure worked for me on the way up....i could hear it

 

So I'm wondering the best route to take now....pin the clutch for the summer or some other direction. Like I said, the clutch free wheels way too much until the engine's up to operating temp, then it sucks plenty of air through the condensor. btw steel fan

 

Wow, never heard of or seen an aluminum bladed fan!

 

Look at almost any cheap aftermarket flex fan. they are riveted aluminum blades and have a tendency to come apart. Years ago I went on a call where a kid was leaning over his Camaro, with a fresh engine, working the throttle, when the fan came off and laid his chest wide open. It was my first (of many) fatal calls. Mark