![]() ![]() The trick is to have a cooling system that keeps things in check. The cap is the pressure relief/safety valve should anything exceed what it should be and prevent damage to components. This is normal within the operating parameters of any engine. This would allow the coolant to expand over into the tank then get sucked back into the main cooling loop as it contracts. If you really want a "surge" tank (which we call it in my work world) you will need to have a tank than can be pressurized which means the tube from the radiator needs to be on the inside/pressure side of the cap seal and your pick up tube going to the bottom of the tank. I believe the drag rules intent are to make sure any coolant doesn't get spilled out onto the track therefore you will need a large enough tank with a manual drain to contain what you may overflow. Overflow tanks are just that - for overflow and collects what gets puked out. I do not think there will be too much coolant sucked back into the system prior to the cap closing back up. When there gets too much pressure from too much heat, it opens outward (from the radiator) and allows pressure to be relieved and coolant to dump out. The cap opens up as things heat up and pressure builds up past its rating. On an older system, you will see usually the puke tube is on the outside of the radiator cap sealing surface. This is where the pressure and coolant expansion is contained within the coolant system as the coolant heats up and expands. If you notice on newer cars, they usually have a reservoir that has a pressurized cap and is not on the radiator itself. I know what a coolant catch can is I'm not looking to just run that. Right now I just have a dangling rubber hose. To recap I like the idea of having an extra 6-10 ounces of coolant, then it would be one less thing to check every other time I drive Mercula. I don't understand how the vent line would work here, I wouldn't want it to vent from the button.? If I fill it to just under the cap hole it might puke some out, if I fill and just cover the fins I don't think any comes out. I'd like something that will suck the coolant back into the radiator. I need an overflow can if I want to make some passes at the track. Also I checked the coolant level now and it's almost empty at the tank.I searched around, but if there is a good thread let me know and I'll just read that one.ģ50 SBC, supposedly crate, no idea on power Also someone recommend replacing the thermostat so I will be changing that as well as the coolant sensor this week and dumping out the coolant and flushing it again but is there anything I should know about this issue?Ĭould it be something else or is this the symptom of something else? At this point I'm not driving the car I don't want to cause anymore damage. I noticed as well there was some coolant that leaked from the coolant temperature sensors, but was told that wouldn't have a major issue from the guy at Autozone which he was the one who said replace the cap in the first place stating it could be a pressure problem. I parked and turned it off and seen coolant on the side of the engine That came from the reservoir which was boiling again. ![]() After some time of driving everything seemed good until at one point I came to a stop and I noticed some smoke. I let the car sit over night purchased a new cap and checked the car and the coolant level was low so I topped it off put the new cap and took it for a spin. Did a flush and when I added new coolant I burped the system as I was told.Įverything has been fine until that night. I did replace the reservoir a few months back due to the fact it had a crack in it and was leaking coolant. ![]() ![]() I looked under the hood and noticed it boiling at the tank. Your problem may simply be a loose or damaged cap not keeping coolant where it needs to be. RADIATOR CAP Cheap and easy to replace, this is the first thing to check. The other night I made it home from driving about 30 minutes from work and when I turned the car off I heard some noises. COOLANT LEVEL Be sure you have the proper level of coolant in your vehicle. This is a 2011 Chevy Cruze 1.4 L Eco with 116xxx miles on it. ![]()
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