Coolant getting too hot??

[B2Mann]

Lately while driving my BII ive noticed the coolant in the radiator has been around 240 degrees. Ive got a temp gauge on my radiator cap wich tells me. My temp gauge in the truck with is digital tells me that the coolant is at about 193-197 degrees. Still feels like the truck is running a bit warm. Is the coolant in the radiator supposed to be that high?? I flushed the system on thursday and the temp is still that high. Any ideas of what the issue may be?

180deg thermostat
single row aluminum radiator. duel electric fans

 

[Area 52]

Aren't ambient temps in Arizona about 193 right now? LOL

Your fan clutch would be one item, but you state you have E-fans. Do the fans have an adjustable switch? I assume the primary fan kicks on when engine meets op temp and the secondary kicks in around 205F or when you turn the A/C on???
I would definitely pull/test or just replace the thermostat and then recheck temps. If temp is still high replace radiator with an Explorer 2 row for A/C & Automatic.

 

[B2Mann]

yah, its pretty damn hot here. heh. Ive just got 2 electic fans. One on each side, pushing and pulling. Truck doesnt have a/c either.... There is a switch than runs both fans at the same time. When I turn the truck on I turn the fans on. I replaced the thermostat in 2007. Its a Jet high flow that I bought off Summit. Last summer the temp on the gauge read 188 deg. Wich is pretty normal for it. I guess I could go and buy a new thermostat for it. I thought about putting that water wetter stuff in it, but I think its a joke...

 

[warrior24]

I am having the same problem although its a 4.0 I think I will just live with it as nothing bad has happened.
http://www.therangerstation.com/forums/showthread.php?t=57383

 

[Area 52]

I would run 10% coolant and WatterWetter. The WW does work but not as well in a high coolant concentration. Water only is more efficient than a 50/50 coolant mix for heat transfer...which is why I prefer only a 10% coolant mix with distilled water. The Jet T/S is probably still good, but throw it in a pan of water with a candy thermometer to test it. If that is good and the coolant mix change doesn't help, then replace the radiator. Buy a 2-row radiator for a 4.0Explorer (automatic w/AC)...it's a drop-in replacement for the stocker. On a side note...have you advanced the timing on it?

 

[B2Mann]

I added the WW to 50/50, and it got hotter. heh Ended up flushing the system and putting 50/50 in it again. Maybe temp gauge on the radiator cap is shot. Its not throwing up at all, so thats a plus. Timing is stock. I used to have it at 12, but dropped to 10 so it stays just a wee bit cooler. Ill probably end up buying a new radiator and thermostat. I seen one on radiatorbarn.com for about $120 but am unsure if its for an explorer with an a/c.

 

[Area 52]

I pulled up their site and selected a 1993 Explorer. Here's the specs:

Core Size: 18 X 18 X 2-1/4
Inlet Header: 3 X 18-1/2
Outlet Header: 3 X 18-1/2
Inlet Connection: 1-1/2 PASSENGERS SIDE CURVED
Outlet Connection: 1-1/2
Transmission Oil Cooler: YES
Engine Oil Cooler: NONE
Mounting: TOP FLANGE/BOTTOM PIN
Notes: TWO ROW, PLASTIC TANKS/ALUMINUM CORE