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Anyone regret doing a Cummins swap?

Went for a test drive.

Fan hits the radiator and put a hole in it:homer:

These are the types of issues that frustrate me, because literally everything I could find on this said the stock Cummins fan and stock 7.3 rad work perfectly together. I've already cut a lot off the fan too. Seemed like it had a lot of clearance before it was driven.

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On a positive note, it seemed to run good, I have not touched the pump or wastegate at all and was surprised at how much power it had.

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I ran a 454 fan blade on mine for awhile. the cummins fan is dished out alot, and the 454 one sits back further on the clutch fan. might work with a ford blade on the clutch as well.
 
V30crewcab said:
I ran a 454 fan blade on mine for awhile. the cummins fan is dished out alot, and the 454 one sits back further on the clutch fan. might work with a ford blade on the clutch as well.
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The Ford one is long gone.

How did the 454 and 12v fan compare?

I realized that you could make a spacer to go between the fan and clutch to move it back. I did find one guy who did it 1/2" but said it was a major pain to assemble because the spacer covers the big nut.

There is also a newer style plastic fan that may have more clearance?

Had to run some wires from. Driver to passenger side. Came out decent except for right at the big plug. No idea what to do there. 40 wires and I'm using 3:homer:

Need to figure out grid heater, cruise and tach at some point.
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It's resting on the ac compressor so I used a 2nd layer of wire sheathing. Could probably add a hold down using one of the mounting bolts.

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Thinking about trying this

Amazon.com

Only problem is I can't wrap my brain around which way the blades are going vs the stock fan:homer: there is basically no info on these out there. Specs on Amazon say max rotation: 1/month :laughing: so it may be a mirrored image for all I know.

I guess I could just order it and see.
 
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For $159, any thought on running 2 smaller electric fans? Then you could put then in the corners to be more out of the way, sheet metal shroud right up on the radiator
 
Provience said:
For $159, any thought on running 2 smaller electric fans? Then you could put then in the corners to be more out of the way, sheet metal shroud right up on the radiator
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I'm pretty against it. Goes against the idea of simplifing the truck with mechanical engine.

I'm not sure you could move as much air with 2 small electric fans anyway?

Lots of people do this on these swaps, but nobody recommends it for towing.
 
YotaAtieToo said:
I'm pretty against it. Goes against the idea of simplifing the truck with mechanical engine.

I'm not sure you could move as much air with 2 small electric fans anyway?

Lots of people do this on these swaps, but nobody recommends it for towing.
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It would double the amount of wiring you have to do, fair point :laughing:

Amazon plastic for the win, then
 
Provience said:
It would double the amount of wiring you have to do, fair point :laughing:

Amazon plastic for the win, then
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I only like the plastic for being easier to trim?(in my head, higher quantity of lighter fins would be harder to get imbalanced) And it supposedly has more clearance, but can't find much on it.

Also totally open to other options (like the 454) as apparently a lot of oems uaed the same pattern.
 
YotaAtieToo said:
I only like the plastic for being easier to trim? And it supposedly has more clearance, but can't find much on it.

Also totally open to other options (like the 454) as apparently a lot of oems uaed the same pattern.
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Easier to trim plus more likely to self clearance itself instead of the radiator or anything else when the engine flexes around

I ran a 9 blade dodge Dakota fan on my van when I did the swap, it was a more firm plastic though
 
Need an earlier GM fan for it to work. That one spins the wrong way.

I bought a Derale 17120 for mine when I was going through the same thing. It is a 20" metal fan that moves it back towards the engine 1 inch. But it didn't clear the fluidampr. I dunno if it would clear a stock balancer or not.
 
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BustedCrank said:
Need an earlier GM fan for it to work. That one spins the wrong way.

I bought a Derale 17120 for mine when I was going through the same thing. It is a 20" metal fan that moves it back towards the engine 1 inch. But it didn't clear the fluidampr. I dunno if it would clear a stock balancer or not.
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Looked like there was about 1 1/2" from the current fan to the water pump snout, which stuck out a bit more than the balancer.

Ordered that one too :homer:
 
Just realized they make that same fan in an 18" and 17" version, probably should have went that route since the stock Cummins fan was hitting the side and top of the shroud.
 
I use a big wrench, and hit it with a hammer to loosen it. they make a nice one that uses an air hammer but expensive if you don't need it every day.
 
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