How well can a probe in the radiator really tell the engine temp though?

 

cesspool it'll work real good, if placed nearest the hottest point (at the inlet). On some refrigeration equipment, we cork tape temp bulbs to the evaporator to control the txv, this sort of control has been around for eons and is quite effective. Most manufacturers of the temp control in question claim a +1 degF/-1degF accuracy of their temp bulbs, that's as good as it gets even with a standard thermometer.Key factor is to insulate the bulb so it reads only the radiator temp, so cork/ tar tape it so the bulb is olny exposed to the radiator.
On another note, MG did you get the adjustable one ? I saw one at jeggs that can be set to cycle on at an adjustable range from 160-240degF. Also does anyone know the cfm draw of this fan we're talk'n about and the cfm draw of the factory clutch fan? For compairison I noticed that the high dollar aftermarkettwin truck e-fan assemblys all claim to draw 5500 cfms both fans running max rpm.This has got me think'n 2 3000 cfm fans for mill'n round Vegas all summer long in 110+++deg weather ac full blast stop and go traffic, It's like the Arizona proving grounds with casinos out here.

 

I had heard it rumored that a 98 Mark VIII would throw 5200 CFM, but they claim all of em will blow 4000 CFM +... Who knows though.... That was just from poke'n round the internet.

I haven't found or heard anything about the CFM of the stock clutch, I was curious also.

Oh and Lil Red, Thanks for the Probe Info!!

 

yes it's adjustable and I think it is about the same 160-240 range.

 

Mean,

Which controller did you get?

 

It's made by torqflo, the exact name would be on that page I posted up earlier in the thread. I went down to the Zone and showed the manageer that it did work but that it was not wired properly so he is ordering me a new one, it should be here by weds or thurs. He didn't hassle me one bit even though it is electrical and they don't do returns or exchanges on them, I guess he knew that wouldn't be a good idea to lose a good customer over a cheap part like that. That's why I always go there, they will make it right if it is wrong.

 

Hey Mean..sounds like the job is almost done so I have to ask...were you able to keep the fan shroud/overflow tank/windshield tank combo or did you have to get others from earlier Durangos? I just bought a fan off e-bay so my day is gettting closer...

 

My Overflow was fine, I will have to take a few pics.

I just replaced the controller today and it is still kicking on wheneverI put the negative terminal on the batteryso needless to say I'm pretty annoyed. One thing I noticed (I think)was that when I shut it off tonight it sounded like the fan speed kicked down to the lower setting, I'm thinking maybe the wire I tapped into for the AC is a constant source and is keeping it going when the ignition is off. I am going to yank it off tomorrow (hopefully) and see if it stays off when the D is off. Other than this I am so close to just installing a switch and that is pretty bad because I really don't want to go with aswitch onsuch a critical thing as a fan...

 

Well I pulled the a/c and ignition switch wires and it stsill ran WTF... I can't figure this out. It has the ring of a bad controller but I just don't understand how I could end up with 2 bad ones in a row. I am gonna go to Summit probably weds. and see if they have a different brand and if that doesn't work I'll be installing a switch. Also it sounds like the fan bearings are going out so I'll probably have to pick up a new fan soon...

 

Mean,

If the controller is really nothing more than a relay, if you have a ohm meter, you can verify all the contact points as far as which 2 contacts are for the replay coil, and which contact is the common, normal on, normal off, etc...

There are times, you may get a wrong electrical diagram layout of a switching relay or controller. Happened to me a couple of times. When that happens, I just use my ohm meter to identify if the contacts are really labelled correctly according to the diagram provided.