rocketwheels Posted January 17, 2016 Share Posted January 17, 2016 ....got a local salvage yard guy that doubles as a jeep guy, he has a ton of NOS parts for jeeps, including these tanks, The "original popped a few weeks into the resurrection, then the NOS replacement lasted a few years and then this NOS replacement has started cracking on top just like the others. I decided to use some under water JB Weld and it has halted the seepage of coolant from the tank for quite a while now. just know I'm due for a failure anytime. They are only $25 bucks for the NOS ones , guess I should buy another and keep it behind the seat ! Other than the standard radiator swap/conversion , is there any kind of replacement tank for these things? I'd like to leave the system as it is. Link to comment Share on other sites More sharing options...
fiatslug87 Posted January 17, 2016 Share Posted January 17, 2016 Have this in all my MJs, fits and works great. Plain:http://macsradiatorshop.com/surge-overflow-tanks/replacment-jeep-radiator-fill-tanks.html Diamond plate:http://macsradiatorshop.com/surge-overflow-tanks/replacment-jeep-radiator-fill-tanks-375.html Link to comment Share on other sites More sharing options...
Marine1Texas Posted January 17, 2016 Share Posted January 17, 2016 The aluminum tank should last for a very long time . I still have a 29 year old tank my self, it has never blown or cracked. Kind of strange how some last and others don't. If mine ever does go, I would get the aluminum tank! Link to comment Share on other sites More sharing options...
sinkrun Posted January 17, 2016 Share Posted January 17, 2016 Do a open system upgrade and toss that plastic piece of crap out. Link to comment Share on other sites More sharing options...
velco Posted January 17, 2016 Share Posted January 17, 2016 The original from Lyon France lasted 20 years, replaced with OEM crown that lasted 5 years. Now running a Macs aluminum in a closed system, going on 5 years and no problems. This one should last till the end of my jeep life... Link to comment Share on other sites More sharing options...
Crash Posted January 17, 2016 Share Posted January 17, 2016 Metal tank or convert to open. Link to comment Share on other sites More sharing options...
jpdriver1 Posted January 17, 2016 Share Posted January 17, 2016 no overflow tanks on open system? Link to comment Share on other sites More sharing options...
Eagle Posted January 17, 2016 Share Posted January 17, 2016 no overflow tanks on open system? An open system needs an expansion tank. If the MAC's aluminum tank had been available when I did my '88 XJ, that's the way I would have gone. But ... it wasn't, so I used a Moroso aluminum surge/expansion tank from a local speed shop. It's also sold by Summit racing. I run it with an overflow bottle: Link to comment Share on other sites More sharing options...
sinkrun Posted January 18, 2016 Share Posted January 18, 2016 http://comancheclub.com/topic/48597-ditching-the-renix-pressure-bottle-for-a-filler-neck-in-the-upper-hose/?hl=filler+neck Link to comment Share on other sites More sharing options...
tugalo Posted January 18, 2016 Share Posted January 18, 2016 Look at the tanks in any mid-90's mopar. They are tough, tough, tough nylon and have a real radiator cap. they are shaped a bit differently but if you remove the bracket that mounts the OEM tank, you can mount them directly to the firewall. no issues with hood closing. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 18, 2016 Share Posted January 18, 2016 Inline radiator hose adapter from Moroso and a standard recovery tank.... I have a thread on it here somewhere. http://comancheclub.com/topic/48597-ditching-the-renix-pressure-bottle-for-a-filler-neck-in-the-upper-hose/ Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 18, 2016 Share Posted January 18, 2016 ^^^^ This is what I did, short of going HO radiator I believe this is the best way to go. don't care for the aftermarket plastic or metal tanks because you still keep all the funky hose routing. Reasons for converting: straight shot for heater hoses, simplified hose routing, less hose connections that can leak, and the cost difference between a metal tank, stock plastic, and the hose filler neck. So if you gonna fix it, why keep it obsolete? Link to comment Share on other sites More sharing options...
velco Posted January 18, 2016 Share Posted January 18, 2016 Thats probably the best and most economical route to take considering the price of the Macs. I must admit I'm getting a bit of coolant squeezing past the 15 lb rad cap when the ambient temperature is above 30C (86F) as I have the overflow blocked. I think an overflow bottle is in my future too. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 18, 2016 Share Posted January 18, 2016 I went from a Mac's tank to the Moroso deal on one of the 3 conversions I did. Link to comment Share on other sites More sharing options...
91Pioneer Posted January 19, 2016 Share Posted January 19, 2016 I must admit I'm getting a bit of coolant squeezing past the 15 lb rad cap when the ambient temperature is above 30C (86F) as I have the overflow blocked. I think an overflow bottle is in my future too. Maybe you have the tank over-filled. You need room for expansion. Take the cap off when it's cold, where is the coolant level at? Link to comment Share on other sites More sharing options...
watchamakalit Posted January 19, 2016 Share Posted January 19, 2016 I contemplated an open system conversion on my 89 but the only problem I have ever had with the closed system was the plastic tank. I went with Macs and so far am very pleased with the product. Link to comment Share on other sites More sharing options...
velco Posted January 19, 2016 Share Posted January 19, 2016 Coolant is 1/2 inch off the floor cold right now, I like to keep it around 1 inch last checked approx 90 days ago. Thats about a 1/5 of the tanks capacity so lots of room for expansion. Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 19, 2016 Share Posted January 19, 2016 ^^^^ This is what I did, short of going HO radiator I believe this is the best way to go. don't care for the aftermarket plastic or metal tanks because you still keep all the funky hose routing. Reasons for converting: straight shot for heater hoses, simplified hose routing, less hose connections that can leak, and the cost difference between a metal tank, stock plastic, and the hose filler neck. So if you gonna fix it, why keep it obsolete? Good question........... Link to comment Share on other sites More sharing options...
cruiser54 Posted January 19, 2016 Share Posted January 19, 2016 I'm putting together a basic parts list with numbers for this conversion. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 19, 2016 Share Posted January 19, 2016 ^^^^ Filler neck conversion? FWIW, when I did mine I found that the upper radiator hose is tapered, meaning the inlet/outlet sizes on the hoses are different diameter, I had a hard time gettin the filler neck installed into the upper hose {was a b*t*h, but I got it), don't they make this adapter with different inlet and outlet diameters to ease installation? Link to comment Share on other sites More sharing options...
cruiser54 Posted January 20, 2016 Share Posted January 20, 2016 ^^^^ Filler neck conversion? FWIW, when I did mine I found that the upper radiator hose is tapered, meaning the inlet/outlet sizes on the hoses are different diameter, I had a hard time gettin the filler neck installed into the upper hose {was a b*t*h, but I got it), don't they make this adapter with different inlet and outlet diameters to ease installation? Huh? Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 21, 2016 Share Posted January 21, 2016 Bought my filler neck to go in the upper radiator hose, same in and out dia, one side went on easy enough, the other, tighter than ****! Thought I was going to tear the hose getting it over the nipple. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 21, 2016 Share Posted January 21, 2016 I did 3 of them with no issues at all. Was it the 63745 Moroso or the one with 2 different sizes? Link to comment Share on other sites More sharing options...
64 Cheyenne Posted January 23, 2016 Share Posted January 23, 2016 I did 3 of them with no issues at all. Was it the 63745 Moroso or the one with 2 different sizes? Been so long, not sure what the part # was. I do know that I was wishing for one with different inlet outlet diameters. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 23, 2016 Share Posted January 23, 2016 I did 3 of them with no issues at all. Was it the 63745 Moroso or the one with 2 different sizes? Been so long, not sure what the part # was. I do know that I was wishing for one with different inlet outlet diameters. Weird. The hose is the same diameter in the middle........... Link to comment Share on other sites More sharing options...
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