temp for 258 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-19-2000, 09:27 PM Thread Starter
 
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temp for 258

Took the cj out for the maiden voyage and was wondering what temp everybody runs with a 258. Mine was running 210 on the highway, 180 on the backroads and 210 sitting in the driveway on a mid seventies day. I know my timing is off, getting a lot of spark knock cold or warm, i checked the distributor to make sure it wasn't loose, it wasn't but I wanted to see how tight it was and it moved so now I have to time it. Anyhow just wondering what everybody else is running. later ken

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post #2 of (permalink) Old 09-19-2000, 09:52 PM
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Re: temp for 258

I'm not sure what temp mine runs, stock gauge is C and H with a green line in the middle. But, it ALWAYS runs right at the first part of the green line, I would imagine that is about 190 or so. BUT, the temp never varies, highway, around town, trail riding, crawling in 100 deg heat. I would be a little concerned about that great a variance in temp that you are experiencing.

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post #3 of (permalink) Old 09-20-2000, 07:34 AM
 
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Re: temp for 258

Mine is the same...runs just barely on the green...I have a 195 thermostat and when I checked it with my wifes meat thermometer (dont tell) it read between 185-190...with a margin of error I'd say it is pretty close to 195.

78 CJ5 w/360
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post #4 of (permalink) Old 09-20-2000, 04:31 PM
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Re: temp for 258

I have a mechanical guage hooked up to the plug in the block below the manifolds. On the highway it reads 210, driveway 195, and driving with the heater on 195. It has a new 195 thermostat installed.

Karl
80 CJ/YJ-7 FrankenJeep

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post #5 of (permalink) Old 09-20-2000, 10:14 PM Thread Starter
 
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Re: temp for 258

Now I have mine hooked into the plug on the drivers in the back. Its an electric auto meter. I havn't had a chance to mess with the timeing(tomorrow) but i'm hoping it solves the problem. ken

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post #6 of (permalink) Old 09-22-2000, 07:48 AM
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Re: temp for 258

I drilled and tapped a hole on the radiator side of the thermostat housing and installed an Auto Meter electric gauge. There is a 195 degree thermostat. The engine runs right at 195 until I get to a good hill or the outside temp warms up as it tends to do in summertime Arizona. In warm to hot conditions, without the aftermarket air conditioner running, the temperature will climb to 205 or so and pretty much stay there. With the air on, climbing a long hill the temperature will hit 215 to 220. This new gauge pretty well agrees with the movement of the stock gauge. When I hit 220 the stock gauge is just at the right edge of the green, edging to hot. 195 on the aftermarket gauge tends to read just to the right of center on the stock gauge. Hope this also helps. BTW, this is on a fairly stock 1980 258, if that matters. John

post #7 of (permalink) Old 09-22-2000, 08:17 AM
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Re: temp for 258

Put in a 180 degree thermostat, Mine with the 195 ran almost the same temp yours does put in the 180 and brought it down to a nice comfortable level so that I wasn't worried you can get them at autozone but you have to ask for it or they will give you the 195.

again this is just my .02


post #8 of (permalink) Old 09-22-2000, 10:55 AM Thread Starter
 
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Re: temp for 258

I get the timing adjusted and still reaches 210 idleing, so I went the local junk yard and picked up a shroud, and I think i will try a 180 thermostat too. ken

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post #9 of (permalink) Old 09-22-2000, 11:00 AM
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Re: temp for 258

You didn't have a shroud!!!![img]/wwwthreads_images/icons/shocked.gif[/img] There's a huge part of your problem right there. That is one of the 3 most important parts of your cooling systme, fan, radiator, and SHROUD. Otherwise your fan is just spinning away serving no usefull purpose. Make sure ot fits snug, not a whole lot of clearance for the blades.

Brad
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post #10 of (permalink) Old 09-22-2000, 11:03 AM
 
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Re: temp for 258

I am just wondering how hot is too hot for a CJ to run. I need to put in a mechanical guage, but for curiosity's sake, what temp is getting dangerous?


Sean

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