19Comanche 87 Posted December 20, 2023 Share Posted December 20, 2023 NEED HELP! I'm totally stupid when it comes to the comanche coolant system. i had to change a coolant hose the other day and lost some coolant in the process. i added some to the overfill tank but i don't think any went back into the system. i have ran it and got it up to temp a few times and still don't notice a change in volume in the overfill tank. I'm not totally sure how much coolant i lost but i would have thought more would have left the overfill by now. my question is, can i just remove the coolant reservoir cap and run it to get the air out of the system? also, is it bad to run it with air in the system? i have the dummy light and its never come on so i don't think its over heated yet. but i don't know if having air in the system is a problem or not. any help or advice would be appreciated. Link to comment Share on other sites More sharing options...
Smokeyyank Posted December 20, 2023 Share Posted December 20, 2023 Since you have a closed system you have to burp it properly. Look through this Link to comment Share on other sites More sharing options...
19Comanche 87 Posted December 20, 2023 Author Share Posted December 20, 2023 9 minutes ago, Smokeyyank said: Since you have a closed system you have to burp it properly. Look through this i did loosen the smaller hose on the thermostat housing and coolant started coming out. does that mean there's enough coolant in the system? i keep seeing bubbling in the coolant reservoir so i figured that the air was trapped and needed to get out somehow. Link to comment Share on other sites More sharing options...
jdog Posted December 20, 2023 Share Posted December 20, 2023 you have a picture of the system installed? just a generic picture of the engine is fine. Link to comment Share on other sites More sharing options...
cruiser54 Posted December 21, 2023 Share Posted December 21, 2023 I have NEVER had to burp a Renix system. Link to comment Share on other sites More sharing options...
Andy in Pa Posted December 21, 2023 Share Posted December 21, 2023 5 hours ago, cruiser54 said: I have NEVER had to burp a Renix system. Me neither, but I like to pull the upper rad hose and fill the radiator that way. Link to comment Share on other sites More sharing options...
19Comanche 87 Posted December 21, 2023 Author Share Posted December 21, 2023 19 hours ago, jdog said: you have a picture of the system installed? just a generic picture of the engine is fine. i have the same setup as the pictures in the link above. 4.0L with the plastic overfill bottle. Link to comment Share on other sites More sharing options...
19Comanche 87 Posted December 21, 2023 Author Share Posted December 21, 2023 11 minutes ago, Andy in Pa said: Me neither, but I like to pull the upper rad hose and fill the radiator that way. the upper radiator hose is the hose that i replaced and lost the coolant from originally. the issue is I'm not sure how much i really lost when i changed it. Link to comment Share on other sites More sharing options...
19Comanche 87 Posted December 21, 2023 Author Share Posted December 21, 2023 5 hours ago, cruiser54 said: I have NEVER had to burp a Renix system. does the coolant just leave the overfill tank on its own? if not then how do you get the coolant to drain from the overfill tank Link to comment Share on other sites More sharing options...
jdog Posted December 21, 2023 Share Posted December 21, 2023 Its not an overflow bottle per se more like an extension of the radiator. If it's moving coolant you should be good Link to comment Share on other sites More sharing options...
19Comanche 87 Posted December 21, 2023 Author Share Posted December 21, 2023 2 hours ago, jdog said: Its not an overflow bottle per se more like an extension of the radiator. If it's moving coolant you should be good is that what the bubbling in the Coolant tank is? Link to comment Share on other sites More sharing options...
jdog Posted December 21, 2023 Share Posted December 21, 2023 Yeah Link to comment Share on other sites More sharing options...
pizzaman09 Posted December 22, 2023 Share Posted December 22, 2023 When ever I've had cooling system issues on my Renix Comanche, I've just topped off the tank and let it circulate to get the air back to the expansion tank. Checked it a few times in the coming days and topped it off until it no longer needed more topping off. That said the most important thing is to make sure the system holds pressure and no longer leaks. Link to comment Share on other sites More sharing options...
gogmorgo Posted December 27, 2023 Share Posted December 27, 2023 If the only hose you pulled off was the upper radiator hose, you shouldn’t have lost too much coolant. Especially if you didn’t pull the thermostat housing off. A hose worth of air in the top of the radiator isn’t going to cause any problems. The upper hose is the inlet to the radiator, and the air isn’t going to flow down the radiator to get stuck somewhere else in the cooling system. If you weren’t worried about anything before you changed the hose there’s probably nothing for you to need to worry about if it’s not overheating and nothing’s hitting the ground. Link to comment Share on other sites More sharing options...
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