Originally Posted by Jeepfreak911
I just got back from Jellico today and i made the mistake of having too much fun in a mud pitt, my engine kept over heating because of the radiotor being caked from mudd. I got the radiator cleaned off well enough to where the engine runs about 220 or a little bit less. But my problem is that in my resavoir the coolent is bubbling out through the over flow??? My coolant is pretty nasty brown, do you guys think its just broken down and needs to be flushed???? Any one have any thoughts?? My resavoir is almost empty now......
I'm not super great with engines and stuff yet, but having a similar overheating problem just last week, I can only tell you what I know.
1. I overheated due to mud caked in my radiator. I used coil cleaner (for like air conditioners and stuff, can find it anywhere) and sprayed it all over the backside of the radiator, let it sit and washed it out. That solved my problem of overheating.
2. I didn't have any bubbling issues and my reserve was more full than usual after my fun, and very dark so I figured something got in, but couldn't figure out how. If your reserve is almost empty, I would suggest that you check for leaks first off. If there's no leaks, flush it and play it by ear.
3. Even though your coolant is pressurized, it's NOT a closed system per say. The reservoir has a nice breather hole that lets air in when the coolant system needs more fluid. Basically, it's just there so that when the coolant system sucks in and out more fluid (temperature change causes the levels to raise and lower) the reservior doesn't become pressurized. Nice idea, but the breather hole is pointed down, effectively keeping out rain and other things, but perfect for letting mud that's being shot up from below the engine compartment (in yours and my case) shoot into your reserve. Once it's there, it settles to the bottom, where the first fluid is taken into the system if needed....sucks. I'm working on something to rig into that, maybe a check valve (one way).