Crossflow Radiator Conversion Info

[CrewCabDiesel]

Here are a list of part numbers to in stall the correct Fan Hub on a cross flow radiator.



From Cummins

1 Fan Bearing Hub #3923004 @ $227. 92

1 Fan Pulley #3917674 @ $32. 85



From NAPA

V-Ribbed Belt #080839 @ $35

NOTE this belt IS NOT a OEM size



I got the new fan shrould from Dodge for a 1992 Cummins

cost around $18



Using these parts and a new crossflow radaitor, makes the conversion look & Work OEM !

You may want to note that just the hub bearing is around $180 from Cummins and much more from Dodge. The part number I have listed is the COMPLETE hub/frame assy .



Hope you all find this handy





Kyle

 

[Gary - K7GLD]

OR, you can do as *I* did, and modify the opening of the NEW fan shroud to match the OLD fan assembly - and SAVE yourself mucho dinero...



OF course, SOME of our group are ROLLING in dough, so don't mind to$$ing their $$$ around...

 

[CrewCabDiesel]

Gary,

You have missed the point, Rigging the fan shrould reduces engine cooling and AC operation while idling, which is why you would WANT to do the conversion in the first place. Not to mention cosmetics of the engine compartment Also you get to replace the fan hub bearing BEFORE it becomes a problem. I am not saying doing the conversion using the non intercooled fan hub setup is a bad way of doing it, but why short cut something so important to the Cummins operation ? With the CORRECT placement of the fan, I have dropped 10 degrees off my AC and I now can let my truck idle for extended periods of time without worring about an overheat



Keep in mind that I posted this to save other members from wasting time and money trying to figure out what parts are needed to do this, it took 3 tries to get the right belt size and two trips to Cummins, and of course a trip to the dealer.

Kyle

 

[Gary - K7GLD]

Just yankin' yer chain Kyle - BUT, for the record, here in sunny and HOT California, I have received (as nearly as *I* can tell!) ALL the benefits of the newer style radiator - I get lots of cold A/C air at ANY road speed or applied load, and my truck has NOT overheated in the same identical locations and loads it did formerly. And I managed to do that for several hundred dollars LESS than the full-bore $$$ exchange - that $$$ difference in making the swap will greatly affect the final decision of many as to whether or not to make the change... YOU are correct and extremely helpful in providing all related info, part #'s and pricing to do the job YOUR way - and I am merely attempting to also provide a lower cost alternative that has worked GREAT - for ME!



Would the spending of DOUBLE the $$$ for the added components REALLY increase cooling noticeably. as compared to adapting the existing stuff - shucks, *I* don't know, I haven't MADE an actual comparison, and don't know anyone who HAS - but since doing it MY way HAS eliminated former cooling problems, I'm inclined to spend the extra $$$ in OTHER areas. instead of throwing even MORE $$$ at a problem that no longer exists...



It's one of those "ya makes yer choice, and pays yer money" sort of things...

 

[wrk2mtch]

CrewCabDiesel, I thought you also had to replace the fan and the clutch. I got quoted $227. 92 for a 3923004, but then it's another $59. 60 for the fan and $136. 00 for the clutch. It would make a big difference if you don't. I was thinking of following Gary - KJ6Q's advice, but if I can use my existing fan and clutch then I might just buy the new hub.