Jeep almost blew up tonight. Need coolant info. - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 01-06-2002, 03:01 AM Thread Starter
 
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Jeep almost blew up tonight. Need coolant info.

Well, after back-washing and cleaning my cooling system today I thought I had it all figured out. The heater was actually working.

Then all of a sudden while driving down the highway tonight, my jeepchick says.. "Something is wrong, it doesn't smell right." (Lucky she was there, my nose was blocked.)

Anyways, the entire system had drained itself through the large (2"-2 1/2") plug on the drivers side of the engine block.
It's a big rubber plug with a metal cover on it and a nut on the top.
It seemed to have been dislodged and was just (luckly) sitting on the heat-sheild under the manifold.

Anyone have any info on this? To put it back in I assume I slacken off the nut, push it in, and tighten it up (expanding the rubber outwards?)

Heh, I was so excited at the same time as being paranoid about my Jeep.
I hopped out with my brand new extinguisher as smoke.. (really steam) poured from under the hood.. poped the hood and was dissapointed by the lack of fire...

Oh well. I guess it didn't burn up in the woods, which means it's still not finished.

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post #2 of (permalink) Old 01-06-2002, 03:15 AM
 
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Re: Jeep almost blew up tonight. Need coolant info.

I don't have any first hand experience with that on a jeep, but it sounds like a "freeze plug".

1989 jeep YJ,4.2L,5spd
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post #3 of (permalink) Old 01-06-2002, 03:25 AM Thread Starter
 
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Re: Jeep almost blew up tonight. Need coolant info.

My dad.. (who came to the rescue.)
Said it was a "block cork?"
I think. Can't remember. There's no mention in the Haynes manual.
Supposedly it's there so when the block is cast and cooled, they can get all the sand/moulding materials out of it.
(Makes sence.)

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post #4 of (permalink) Old 01-06-2002, 03:39 AM
 
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Re: Jeep almost blew up tonight. Need coolant info.

please wait for picture of core plug. this is out of my haynes for YJ

haynes calls it a core plug

1989 jeep YJ,4.2L,5spd
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post #5 of (permalink) Old 01-06-2002, 03:59 AM
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Re: Jeep almost blew up tonight. Need coolant info.

[img]/wwwthreads_images/icons/smile.gif[/img] Them's CORE PLUGS, and they is used to support the sand core that forms the water passages inside the engine block. Them rubber ones is a cheap fix that sumbuddy jes' stuck in there. Use a nice brass replacement plug to fix the engine, and above all, mention over and over (in her presence of course)how your precious Jeepchick saved your Jeep by her quick response to a barely discernible odor anomaly.[img]/wwwthreads_images/icons/crazy.gif[/img]

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post #6 of (permalink) Old 01-06-2002, 01:34 PM Thread Starter
 
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Re: Jeep almost blew up tonight. Need coolant info.

Dave, this is getting embarrasing.

This is the third time she's mentioned a odd smell.
First time it was a fuel line on the manifold.
Second time it was a rad-line melting, and this time I guess it was boiled anti-freeze.

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post #7 of (permalink) Old 01-06-2002, 02:23 PM
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Re: Jeep almost blew up tonight. Need coolant info.

Yep, core plug aka freeze plug. I don't care for the rubber type either, never used one, but some find them easier to install in a tight place. Temporary fix at best.

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post #8 of (permalink) Old 01-06-2002, 04:16 PM
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Re: Jeep almost blew up tonight. Need coolant info.

Perhaps someone had used one of these plugs to fix a leaky block heater.
Are all the other frost plug the normal press-in metal type?


post #9 of (permalink) Old 01-08-2002, 05:03 AM
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Re: Jeep almost blew up tonight. Need coolant info.

[img]/wwwthreads_images/icons/tongue.gif[/img] When we built racin' engines back in the sixties, we always equipped them with a bolt-in core plug that used a "T" bolt arrangement with a big heavy washer the size of the block recess bore, a gasket, and then an acorn nut on the outside. We got those from NAPA.[img]/wwwthreads_images/icons/tongue.gif[/img] Boy! That is SOME Jeepchick! Inferno-guy needs to do A LOT of raving in her presence about how precious and valuable she is!........again and again.[img]/wwwthreads_images/icons/crazy.gif[/img]

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post #10 of (permalink) Old 01-08-2002, 08:35 AM
 
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Re: Jeep almost blew up tonight. Need coolant info.

i think he brings her along for the same reason the coal miners brought birds dowm in the mine to snoff out the bad stuff first lol

jeep the first 4 wheel drive the only 4 wheel drive
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