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Radiator flush... Or not.


 
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kingjustin
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Joined: 07 Mar 2006

PostPosted: Tue Mar 07, 2006 2:16 pm    Post subject: Radiator flush... Or not. Reply with quote

I bought all the things to flush my radiator out, since it overheated a few days ago and I noticed a rusty build up under the radiator cap.
Problem?
I can't find the drain valve.
I have a '92 sport edition. Anybody know?
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turd
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Joined: 27 Jul 2005
Location: cookvegas

PostPosted: Tue Mar 07, 2006 3:31 pm    Post subject: Reply with quote

maybe you have found it by now but the radiator drain can be accessed by removing the plastic grille panel in front.

Don't have a clue about the flush/no flush question but if it truly is rust it is probably from the engine rather than the radiator. Most radiators are made from copper or aluminum alloys.

If nothing else I can give you a bump to the top of the board
_________________
Lucille:
'96 4.0 4x4 XJ
with some lame highway tires

Jenny:
'94 4.0 2x4 XJ
with lots of BODY CARNAGE
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kingjustin
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Joined: 07 Mar 2006

PostPosted: Tue Mar 07, 2006 5:55 pm    Post subject: Reply with quote

Thanks for the tip. I found it, but it's stuck on tight and I can't get it off. Any ideas on that? It's rather hard to access.
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Titan4u2c
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Joined: 03 Dec 2005
Location: Clayton, NC

PostPosted: Wed Mar 08, 2006 9:04 am    Post subject: Reply with quote

How important is your ride? haha If it's the orig rad in that '92 I would recommend you just bite the bullet if you can afford it, and replace the rad. You can get a cheap stocker 2 row for less than a hunred, and a decent heavy duty 3 row for less than $135. Both I found on e-bay and shipping of course another 25 bones or so. I have a '91 and it had been thru 2 of those plastic stock jobs and still overheated, once from offroad crawling and once on the highway...but I was doin 85 for like 5 hours, so... Anyway I have a 3row aluminum with that 50/50 anti-freeze mix and have yet to have a prob in any driving conditions. So like I said if you're on a budget I understand but for under a buck fifty I now have peace of mind. If you have to reuse the one u got and still cannot get to that vavle, ret removing the whole rad. Will cost you 8 bucks to refill the anti-freeze but that's the cheapest way I guess. Oh, and replace that rad cap with a new one, say STAT brand. Hope this helps, good luck!
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Renegadestang
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Joined: 07 May 2005
Location: Marietta, GA

PostPosted: Wed Mar 08, 2006 9:18 am    Post subject: Reply with quote

If you do get a new radiator, just check out www.radiator.com. They've got some of the best prices out there. When I ordered my radiator for my '98 XJ, they had the stock 2-row with the plastic tanks and the 3-row with the all metal tanks. They were having a special at the time where the 3-row cost as much as the 2-row! They also carry a warranty.
_________________
1998 Jeep Cherokee Sport: 4.0L, AW4, 235/75 Wild Spirit's

1981 Jeep CJ-7 Renegade: 307-4V SBC, SR-4 4-spd., 31x10.5 Wild Spirit's

1966 Ford Mustang: 289-4V, C4 Auto.
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kingjustin
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Joined: 07 Mar 2006

PostPosted: Wed Mar 08, 2006 5:36 pm    Post subject: Reply with quote

Thanks for the help guys!
I decided to flush the radiator for now...the budget is a bit constricting.
One thing I'm not too sure on is this:
I've flushed it out once with solvent and twice with clean water. The water runs clear now, but the bottle is still pretty full. When specifications say that the rad. capacity is 12.5 quarts, does that include the resevoir bottle or is it just the rad. itself? I'm trying to figure out how much coolant to add.
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majikxms
Moderator
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Joined: 18 Feb 2004

PostPosted: Wed Mar 08, 2006 5:49 pm    Post subject: Reply with quote

The radiator should hold about half of the full amount listed, the rest is in the engine block. I've found that after I drain and flush the system clear as you did I only need to add a bottle or so of coolant to bring it up to the normal 50/50 mix. Then top off the reservoir to the fill line as needed.
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