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Unread 06-20-2013, 03:57 PM   #1
way2fastmike
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1973 CJ5 
 
Join Date: Apr 2013
Location: wilson, north carolina
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safe operating temp question

what is a safe operating temp for a 73 cj5 304 jeep. mine runs about 210 is that ok or not, the po did a soa and it looks like the fan is not in the middle of the radiator so I was thinking of removing it and installing a electric one, any thoughts????? thanks guys
michael

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Unread 06-24-2013, 10:00 AM   #2
Oldcraneguy
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1982 CJ7 
 
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Personally Ive never hurt an engine @ 210 and nowadays thats normal but on the old iron I baby anything thats running over 190 and start looking for ways to bring it down to the 180 range whether with a fan or bigger radiator or t-stat etc ...just my opinion
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Unread 06-24-2013, 11:26 AM   #3
Dngrs1
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210* is on the high side of the "comfort zone", IMHO. Your probably not going to hurt anything at that temp, not until you get to around 230-250. Your normal operating temp. will depend upon more than just air flow through the radiator. Coolant condition, coolant flow, engine condition, timing, oversized tires, lower gears, driving conditions and environment all contribute to engine coolant temp.
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Unread 06-24-2013, 11:30 AM   #4
hotrod351
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210 isnt bad but id add a electric fan as a pusher in front of the radiator, ive never been a fan of just depending on a electric fan alone. might be time for a new radiator.
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Unread 06-24-2013, 11:33 AM   #5
82JeepCJ7
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What gauge are you using?
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Unread 06-24-2013, 11:38 AM   #6
davbytrace
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195 degrees F is the highest you should go.
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Unread 06-24-2013, 11:46 AM   #7
wblackm
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You generally want to run 5-15 degrees higher then you t-stat rating. This allows coolant to circulate consistently without constantly opening and closing the t-stat constantly. I don't know what your t-stat is rated at, I would guess 180-185(this would put you in the 190-200 range).

I run a 4.0- My T-stat is rated at 195. I try to run between 200 and 210. However, I just put a new aluminum radiator on and can't quite get it hot enough when running down the road. This means I will probably where out my t-stat earlier than normally. All that said, I would always lean on the side of cooler rather than hotter.
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Unread 06-24-2013, 01:13 PM   #8
82JeepCJ7
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My CJ7 came with a 210 thermostat in it from the factory...
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Unread 06-24-2013, 03:59 PM   #9
LumpyGrits
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Why do you think the gauge is correct?
When was the last 'rod-out' done on the radiator?
Does your's have a shroud?
How far is the fan from the radiator? Shouldn't be more than 1".
LG
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Unread 06-24-2013, 04:10 PM   #10
way2fastmike
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lumpygrits........I don't know, not since I have had it, no shroud, about 1" but it does not sit in the middle of the rad, sits about a 1" or so low.
thanks
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Unread 06-24-2013, 04:33 PM   #11
LumpyGrits
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Quote:
Originally Posted by way2fastmike View Post
lumpygrits........I don't know, not since I have had it, no shroud, about 1" but it does not sit in the middle of the rad, sits about a 1" or so low.
thanks

How long have you owned it?
They ALL sit to the driver's side as OEM.
Look into get'n a shroud. They work(when the rad. is clean)and I live in the Mojave Desert......
Pull the rad. and have a rod-out done. Then you can go from there.
When you fill the now clean rad. Only mix the coolant with distilled water. NO tap water, due to deposit's that turn to 'rock' later on.
LG
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Unread 06-24-2013, 08:38 PM   #12
way2fastmike
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will do thanks.
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Unread 06-24-2013, 10:01 PM   #13
82JeepCJ7
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Mine is not centered top to bottom either. Its sits lower than center. The fan shroud actually goes from the radiator, down to under the fan.

You can see from the pic that the OEM shroud is not centered side to side as well.

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