AARRRG !!! - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 04-18-2003, 01:47 PM
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I have an 84' CJ7 w/a 258. installed ALL NEW cooling system.
Radiator, 6 aluminum blade fan, rev. water pump, thermostat, hoses, sensor, and guage.
Still "OVERHEATING!!!!!" after all that. any one have any other ideas? does anyone know of a temp reading from the radiator cap hole with a thermometer?
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post #2 of (permalink) Old 04-18-2003, 02:11 PM
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Re: AARRRG !!!

First off, <font color="green"> LEVE </font color> will be along shortly to welcome you to the forum. Have you thought about an electric pusher fan in front of the radiator? Another thing I saw after rereading your post, </font><blockquote><font class="small">In reply to:</font><hr />
6 aluminum blade fan

[/ QUOTE ]
Is this a flex fan? The PO of my CJ5 put a flex fan on it. At higher rpms these flatten out and don't pull air through the radiator. Just a thought.

TheBigUgly [img]images/graemlins/beach.gif[/img]
post #3 of (permalink) Old 04-18-2003, 02:39 PM
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Re: AARRRG !!!

Is it possible something is blocking a water passage in the block? Rust/sticker/RTV something like that? If you replaced everything else it could be a problem inside the block.
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post #4 of (permalink) Old 04-18-2003, 03:54 PM
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Re: AARRRG !!!

You should drop a thermometer into the open radiator neck. Once the thermostat opens, it should read about the same as the thermostat temperature.

Could you have a gauge problem?
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post #5 of (permalink) Old 04-18-2003, 04:05 PM
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Re: AARRRG !!!

Do you have a fan shroud? I had an over-heating problem wiht my CJ-5 and the shroud cured it. [img]images/graemlins/burnout.gif[/img]
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post #6 of (permalink) Old 04-18-2003, 04:23 PM
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Re: AARRRG !!!

check back pressure in the exhaust, could be plugging up on you. Look for dents restrictions, etc.
could be weak hose that is colasping on the suction side of the water pump.
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post #7 of (permalink) Old 04-18-2003, 10:01 PM
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Re: AARRRG !!!

Why a reverse water pump?Friend of mine had a 84 CJ and they got a reverse pump by mistake and it took them 6 months to figure out it was the pump that caused the over heating. [img]images/graemlins/cussing.gif[/img]
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post #8 of (permalink) Old 04-18-2003, 10:02 PM
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Re: AARRRG !!!

1. Welcome to the forum.
2. Please complete your user profile:[*] It's a nice thing to do.[*] It's helps to know who we're talkin' to.[*] It helps to know what's your ride.[*]It helps to know the local in which you live.

3. Read the New Posters Message at the top of the forum.
4. Participate! Two brains are better'n one!
5. How is it overheating?
6. Is the radiator boiling over?
7. Is there coolant flowing to the overflow?
8. Did you install the correct water pump (one can be a reverse flow).
9. Is the thermostat opening?
10. Is there water flow in the radiator whe the thermostat opens?
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post #9 of (permalink) Old 04-19-2003, 02:08 AM
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Re: AARRRG !!!

How about the fan clutch? It is an often overlooked item.
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post #10 of (permalink) Old 04-22-2003, 02:00 PM
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Talked to a dude yesturday that said my in-line six 258, on the rear driverside of the block they had problems with the head gaskets blowing out. I can hear something from there like that too. SO, its off the the compression tests i go!
thanks for the replies. Let you know how it turns out!

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