Tanner Posted May 10, 2014 Share Posted May 10, 2014 Is There Any Reason I Can't Use The Coolant Reservoir From The 2.5 Comanche In My 4.0 Comanche After It Has Been Converted To An Open Cooling System? I'm Curious Because I Obviously Cannot Keep Or Use The OEM Bottle and I'm not particularly thrilled with the idea of trying to make a bottle from a more recent year fit. On another note, care to weigh in on eliminating the heater control valve? Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 10, 2014 Share Posted May 10, 2014 Yes, any overflow bottle will work as long as it holds enough and can syphon the fluid from the bottom. Link to comment Share on other sites More sharing options...
Tanner Posted May 10, 2014 Author Share Posted May 10, 2014 Yes, any overflow bottle will work as long as it holds enough and can syphon the fluid from the bottom. Awesome thanks! Link to comment Share on other sites More sharing options...
Rockfrog Posted May 10, 2014 Share Posted May 10, 2014 Originally my overflow bottle was a modified Fast Orange bottle with some brake line to siphon. Now I have a 92 4.0 bottle since I couldn't find a 2.5L bottle at the time. Link to comment Share on other sites More sharing options...
Tanner Posted May 10, 2014 Author Share Posted May 10, 2014 Originally my overflow bottle was a modified Fast Orange bottle with some brake line to siphon. Now I have a 92 4.0 bottle since I couldn't find a 2.5L bottle at the time. Was it difficult to get it to fit in properly? I know I have some vacuum lines laying against the inner fender I just want to be careful not to pinch them. Link to comment Share on other sites More sharing options...
Rockfrog Posted May 10, 2014 Share Posted May 10, 2014 Which ... the 4.0 bottle? Not really ... just used the HO bracket and added parts of the Renix bracket to it where needed. The coil is currently zip tied to the HO bracket ... but I have a ZJ coil lead so I plan to move it to the firewall where the old pressure bottle was. Link to comment Share on other sites More sharing options...
Tanner Posted May 10, 2014 Author Share Posted May 10, 2014 Yeah the 4.0 bottle. Okay thanks I'll look into that. I'm having a hard time finding any parts where I live, so I may just have to make whatever I can find work. Link to comment Share on other sites More sharing options...
MuddFoot Posted May 10, 2014 Share Posted May 10, 2014 autozone has a universal overflow bottle for like 10 bucks.i mounted mine where the pressure bottle was.. Link to comment Share on other sites More sharing options...
Tanner Posted May 10, 2014 Author Share Posted May 10, 2014 It was direct fit? And is it cheaply made or does it seem like it will last a while? Link to comment Share on other sites More sharing options...
MuddFoot Posted May 11, 2014 Share Posted May 11, 2014 custom mounts with 2 small bolts and is square wish i had a pic for you but its dark now Link to comment Share on other sites More sharing options...
Tanner Posted May 11, 2014 Author Share Posted May 11, 2014 No worries, has anyone given any thought to using an aluminum coolant bottle? Once. The original mounting bracket has been removed, there should be plenty of room for one. Although I'm not sure about capacity, I think it holds 800ml... Does anyone know if that would be sufficient or would I need something larger. Once again It WON'T be the original closed system. Link to comment Share on other sites More sharing options...
ajohnson928 Posted May 11, 2014 Share Posted May 11, 2014 This is a project I'm planning to do this summer. What parts are you using to convert it to an open system? Link to comment Share on other sites More sharing options...
Tanner Posted May 11, 2014 Author Share Posted May 11, 2014 This is a project I'm planning to do this summer. What parts are you using to convert it to an open system? We'll the original reason I even started this project was because I bought this truck about 3 weeks ago and the more I dig into the truck the more things I find that the previous owner did wrong... IE: the Cooling system. They swapped out the radiator with an open radiator I believe from a 94 cherokee. However, they left the original pressure bottle... All they did was cap the bottom hose going to the heater and the bottle was no longer connected to the heater valve... The whole thing was a MESS basically and not done properly. I am going to be eliminating the heater control valve unless I can find a reason not to other than AC doors being stuck open. So I bought 3ft of 3/4 heater hose 3ft of 5/8 heater hose Around 6ft of 5/16 fuel hose (for the overflow bottle) I am buying a new 195degree thermostat Two hose adapters for 3/4 to 5/8 hose...(this is because in order to not reverse the flow through the heater core the 3/4 hose goes the the 5/8 on the heater core and vise versa.) Since I am eliminating the heater control valve I had to cap the vacuum line to the valve so I got a pack of 1/8 inch vacuum line caps. And I need to buy a new radiator so I'm going to buy one from teamcherokee.com. But those radiators I believe don't have the port for the sensor that turns on the auxiliary fan... Still trying to figure that out. I'll keep you posted Still looking for a bottle as you see in my previous post^^ Link to comment Share on other sites More sharing options...
Tanner Posted May 11, 2014 Author Share Posted May 11, 2014 The guy in this video addresses the fan switch issue but it's in the second video. The first video is the conversion from the start! Check it out Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 11, 2014 Share Posted May 11, 2014 Keep your closed style radiator if it's in good shape and functioning properly. No need for an added expense on newer radiator with filler neck. Just buy this Moroso filler neck from Amazon and splice your upper rad hose like so: Link to comment Share on other sites More sharing options...
Tanner Posted May 11, 2014 Author Share Posted May 11, 2014 It's already been swapped out and the radiator that I just pulled out is in bad shape. I appreciate the suggestion! Definitely would've been my choice if It was going to be possible, didn't think of that, thanks! Link to comment Share on other sites More sharing options...
Tanner Posted May 11, 2014 Author Share Posted May 11, 2014 Do you have any idea what sort of volume my reservoir would need to be able to hold? Also where did you get the cover for you engine compartment fuse box Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 11, 2014 Share Posted May 11, 2014 I'm not sure what the minimum fluid capacity should be for the over flow bottle, but I'm sure anything above a quart should suffice. The later model XJ bottle holds over half a gallon but as long as you have everything sealed good and the rest of the system filled correctly, the reserve in the bottle shouldn't fluctuate much.As far as the cover you're referring too, it's just the stock one that I cut and modified. I had to move the relay center over by about two inches towards the passenger fender well to accommodate the later model XJ bottle. I also had to relocate the ignition coil. I wanted mine to appear mostly stock. See below: I anchored the bottle in place with some bracket I had laying around... Link to comment Share on other sites More sharing options...
Tanner Posted May 12, 2014 Author Share Posted May 12, 2014 Awesome, thanks for the help! Link to comment Share on other sites More sharing options...
ajohnson928 Posted May 16, 2014 Share Posted May 16, 2014 Onlyinajeep can you fill me in a little on your vacuum setup in your pic? I've been wrestling with vacuum leaks since i bought this thing. Where did you get that canister? Link to comment Share on other sites More sharing options...
cruiser54 Posted May 16, 2014 Share Posted May 16, 2014 This is a project I'm planning to do this summer. What parts are you using to convert it to an open system? We'll the original reason I even started this project was because I bought this truck about 3 weeks ago and the more I dig into the truck the more things I find that the previous owner did wrong... IE: the Cooling system. They swapped out the radiator with an open radiator I believe from a 94 cherokee. However, they left the original pressure bottle... All they did was cap the bottom hose going to the heater and the bottle was no longer connected to the heater valve... The whole thing was a MESS basically and not done properly. I am going to be eliminating the heater control valve unless I can find a reason not to other than AC doors being stuck open. So I bought 3ft of 3/4 heater hose 3ft of 5/8 heater hose Around 6ft of 5/16 fuel hose (for the overflow bottle) I am buying a new 195degree thermostat Two hose adapters for 3/4 to 5/8 hose...(this is because in order to not reverse the flow through the heater core the 3/4 hose goes the the 5/8 on the heater core and vise versa.) Since I am eliminating the heater control valve I had to cap the vacuum line to the valve so I got a pack of 1/8 inch vacuum line caps. And I need to buy a new radiator so I'm going to buy one from teamcherokee.com. But those radiators I believe don't have the port for the sensor that turns on the auxiliary fan... Still trying to figure that out. I'll keep you posted Still looking for a bottle as you see in my previous post^^ Elimination of the heater control valve will not have any adverse effect on your blend doors. Do it. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted May 16, 2014 Share Posted May 16, 2014 Onlyinajeep can you fill me in a little on your vacuum setup in your pic? I've been wrestling with vacuum leaks since i bought this thing. Where did you get that canister? That contraption I got hooked to the CCV breather? It's just some screw-on style PVC ends with plastic elbows inserted on each end. Inside, I have mesh (a scouring pad or brillo pad/steel wool) stuffed inside, and on the top side elbow, I have a small air filter attached. This is the writeup I went by: http://www.jeepforum.com/forum/f12/i-made-_____-my-yj-post-your-homemade-jeep-stuff-here-457361/index6.html#post5039835 This is a better picture of mine. I don't have it in place anymore because I've done an engine swap since then... Every so often, I had to drain the oil back down in to the valve cover because it would like to collect inside and in the lower elbow (which was the point). Link to comment Share on other sites More sharing options...
ajohnson928 Posted May 18, 2014 Share Posted May 18, 2014 Thanks for the link. I did the conversion today, pics available if you want to see them. Found that the original radiator was still in there after 25 years. But I also found out that the electric fan isn't kicking on. It runs when the AC is switched on so I know the fan motor is good. What do you all think, relay or switch replacement in order? Link to comment Share on other sites More sharing options...
cruiser54 Posted May 18, 2014 Share Posted May 18, 2014 Thanks for the link. I did the conversion today, pics available if you want to see them. Found that the original radiator was still in there after 25 years. But I also found out that the electric fan isn't kicking on. It runs when the AC is switched on so I know the fan motor is good. What do you all think, relay or switch replacement in order? Jump the connectors at the tep sensor and report back. key On of course. Link to comment Share on other sites More sharing options...
ajohnson928 Posted May 18, 2014 Share Posted May 18, 2014 Will do. Working tomorrow so it may be a couple of days before I can check. Thanks Link to comment Share on other sites More sharing options...
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