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post #1 of (permalink) Old 08-20-2000, 06:41 PM
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350 Temp?

Just wondering what the optimal running temp was for a 350? Any thoughts would be great. TIA Jay

85 XJ 350,TH350,NP207,4 1/2 lift, 32x11.50 sport kings, custom bumpers, roof rack etc.
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post #2 of (permalink) Old 08-20-2000, 07:38 PM
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Re: 350 Temp?

my 350 runs at about 220-230 degress. not sure if this is good or bad but the truck runs great


MUDD_RAT: 1978 Chevy K-10 with dana 44 front, 12 bolt rear 350/350/203 running 15/39/15 Mickey Thompson Baja Belted
post #3 of (permalink) Old 08-20-2000, 07:49 PM
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Re: 350 Temp?

I don't know what year yours is , but my '94 generally runs consistently at 200 in normal driving. Going up a steep mountain it hits 210 or so. The only time I've seen 230+ is after wheeling in deep sand.

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post #4 of (permalink) Old 08-20-2000, 11:33 PM
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Re: 350 Temp?

my '94 usually runs betwen 190-210....pretty good for south texas heat. i just poured in a bottle of water wetter this past friday night, and its jkept the temp downa little less

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post #5 of (permalink) Old 08-21-2000, 12:30 AM
 
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Re: 350 Temp?

The newer engines tend to like to run a bit hotter than the older ones. Your sig says 85 XJ with a 350, so I have no way of knowing how old your swapped in motor is. If it's an older carbureted model I'd say try to keep the temp between 180-200, although they'll run fine hotter than that, in my experience they run best in that range. Another thing, the cooler you keep it the fewer problems you'll have with things like heat soak and vapor lock, especially in a cramped engine compartment like in a Cherokee with a 350. I run a 350 with a big block radiator, standard flow water pump, 19" flex fan with a shroud and a bottle of Water Wetter in the cooling system and it runs right at 180 degrees most of the time. In really hot weather or while running slow trails on a hot day it'll get up to 190 or so.

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post #6 of (permalink) Old 08-21-2000, 02:04 AM
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Re: 350 Temp?

Mine runs about 160 or less usually. It's always been real cool. Small Block Chevy's are usually very cool running. Known among crash 'em derby drivers for their ability to keep going after your radiator is part of someone else's rearend.

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post #7 of (permalink) Old 08-21-2000, 08:58 AM
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Re: 350 Temp?

Thanks for the replies. Here is a little more info. It is a 78 motor. I am using a 180 degree tstat with a 17 inch flex fan with no shroud at the moment and it is running between 200-210. I am in the process of building a shroud to help with the cooling. Is the 180 tstat good or should I switch back to the 195 that originally came in it? Anyways thanks again. Jay

85 XJ 350,TH350,NP207,4 1/2 lift, 32x11.50 sport kings, custom bumpers, roof rack etc.
post #8 of (permalink) Old 08-21-2000, 07:01 PM
 
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Re: 350 Temp?

AJM, switch to a 180 degree stat, you'll get better power and mileage. Trust me, I ran a 160 for awhile before switching to a 180 on the recomendation of some friends.

Jay, stick with the 180, you'll probably be fine once you get the shroud done.

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post #9 of (permalink) Old 08-21-2000, 07:36 PM
 
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Re: 350 Temp?

Where can you get Redline Water wetter and do you dump it in the radiator?

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post #10 of (permalink) Old 08-21-2000, 08:01 PM
 
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Re: 350 Temp?

You can find it at alot of parts stores, or online if you can't find it local. Yes, you just dump it in the radiator.

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