Use anti-freeze with care! YES! If you have pressure that comes out of the radiator, you still have a problem of compression getting into the radiator. When the engine reaches a certain temperature, it opens allowing … Normal for the coolant to push out as the engine warms up due to thermal expansion. I'm guessing head gasket, mine did same thing. Is it oily? Coolant level raises and then coolant comes out of radiator. cap. The guy who said to use HOAT does need to use HOAT. Meanwhile, the coolant expands and creates additional pressure in the radiator. Location: No city...only 118 residents in Manter, All of the ones I've seen have the HOAT tag on the overflow tank. I alwaays ran a 13 lb. The car has to be cold then you remove the radiator cap and put it back on, then start the car put it in drive and then mash the brake pedal and push the gas pedal and run it to 2500rpm for like 30 seconds and shut it off. Just a quick thought here....does your lower hose have the wire coil inside it to keep it from collapsing? It runs fine after that but there's always tell tale water dribbles and sometimes steam under the radiator cap when I stop for fuel. The coolant expands as the motor heats up and is pushing coolant out. Add water/coolant when necessary. ), http://www.uniquecobra.com/forums/forumdisplay.php?f=68. I thought that was only for newer wranglers????? Check to see if the radiator has holes in it or if the cap looks worn or damaged. My 2001 PT Cruiser began to over heat today. If the hose is collapsing, you should be able to watch it collapse while revving the motor sitting in the driveway (the water pump suction is what sucks it to a collapsed condition). The radiator acts to protect the engine block from overheating when it is functioning properly. As the title says, cold engine, radiator cap off, and engine running. --- Full the reservoir, put the cap on and see what happens. YES! Put the top back on, fill up the overflow bottle to the fill mark and leave it alone as nothing is wrong. Once the motor is warm, monitor the radiator level and replace coolant as needed. This is a pressurized system, so it may blow some coolant out at you. If so, then replace the cap. You aren't having any overheating issues are you? It is quite normal for coolant to be pushed out of the radiator cap. Welcome to Club Cobra! What's the rust colored stuff? If you have a pressure release tab on the cap pull that out. I drove the truck for about 5 miles home yesterday and went to take the pressure cap off and it blew coolant out so i closed it quick. So, the radiator coolant overflow tank functions to serve this exact purpose. If this doesn't help, you'll need to raise the front of the vehicle so the radiator cap is above the heater core hoses. If you have access to the radiator cap I would fill from there. Saturday was the first day I had the car on the road since bleeding the coolant system. If none exist, fill the radiator per the manufacturer spec and warm the engine with the cap off. Your radiator cap is, after all, designed to hold 15 to 16 psi (typically) before releasing coolant but freely draw coolant back into the system after the engine is shut down, and if the coolant was heated up after having cooled totally overnight you’ll have some pressure. Once I stopped I heard a bubbling noise and watched as all my coolant steadly dripped onto the ground (almost a pour). Coming home with the air temp at about 95 is when it started leaking out the cap. Please enter a valid e-mail address for yourself. I filled the radiator all the way and the reservoir tank between low and max level. Keep in mind that if any animals drink the coolant, they can get very sick and it could lead to a death. I could be possible to have a cap tight without no leaks, but having its valve damaged, which would lead to overheating as well, since the cap won't be managing system pressure as it should, probably sending coolant to the system's expansion tank. Then fire it up, let it run for about one minute. Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR. cap … Your radiator cap is a small part that plays a big role in keeping your engine from overheating.There are several warning signs that your radiator cap is not working right: 1. If you can't see anything wet looking when you open the hood, the leak could be from under your water pump. Took this pic this morning. 1. You don't. If not, it could collapse and there won't be adequate flow to the engine, the little coolant that does make it will heat rapidly, then surge....... One thing I forgot to mention. Remove the cap again. "what happens when car runs without radiator cap on" - it depends on how long it was off and what happened. Look at the top of the oil fill cap for the same stuff. Another thing that comes to mind here is a faulty electric cooling fan motor up near the radiator. When you have filled your coolant as much as possible, open the radiator cap … As the pressure causes the coolant to get higher than the pressure cap, the excess coolant needs to be captured somewhere in order to prevent leakage. The excess fluid flows into the overflow tube and goes into the overflow tank. Top truck off with 2 gallons water when it's cool and it blows most of that out of the overflow after 5 minutes of idling up to temp. non biased Shelby Cobra related site! If you still cant get it off and it is past the spot where you had to push down to get over the little hump, try getting a giant pair of channel locks on it and pull it off. Isn't it supposed to go into the reserver tank? Note that passwords are case-sensitive. Run the motor for a good 15 minutes with the radiator cap off and watch for air bubbles coming out of the radiator neck. Coolant slowly started overflowing out of the the radiator. You are correct. with a T-5 "Living the Cobra Experience". I had to drain some coolant out of the radiator (aluminum)to have a small pinhole leak repaired, I guess it was from a small rock. When the garage left the cap off the overflow reservoir, the cooling system was unable to maintain pressure which means that the coolant boiled and would have spilled out into your engine bay.This could have damaged equipment nearby especially electrical connections. I drove to a car show that morning, temp outside was about 70 & the show was 25 miles from home. Can I tell by looking at it while the car is running if it is collapsing? This will bleed any air from the radiator and cooling system before you replace the pressure cap. When doing a hard pull under boost the temp does not climb past 195 but the radiator cap pops off and sprays coolant out and down the radiator. The purpose of the radiator cap is twofold: Increases the pressure in the cooling system, which raises the boiling point, making heat transfer more effective; Regulates the pressure to prevent damage to the system (blown seals, ruptured hoses) The second purpose is why coolant escapes. As I was reading through two things occurred to me: Cap loose, especially easy to do with the in-line cap, or debris under the gasket. My radiator seems to be pushing the coolant into the overflow tank. Inspect the radiator cap if it is worn out. Mine was, no smoke and no water in oil, but coolant kept leaving the system. If you notice coolant near the radiator or the radiator cap, then you clearly have leaky coolant. The water pump really doen't cause the coolant to "swirl". If you encounter a vehicle that experiences coolant coming out of the coolant reservoir tank, it may be caused by the radiator cap pressure valve being stuck open by debris sucked up through the reservoir tank hose. p.s. The fix: When flushing the radiator and cooling system, make sure you run the engine with the pressure cap off for 15 minutes after refilling the system. No, the lower hose doesn't have a coil in it. Put it on and turn it until it stops and then push down and turn it about 1/8-1/4 turn more. It overflowed later that day. Loose cap = possible leak from the cap (liquid or evaporated coolant) OR cap internal valve damaged or not sitting well in its base. After a cold start you may open up the radiator cap and squeeze the top hose to get the air out of the system. I don't know about yours but I think mine is a two clicker. 12 people found this helpful. No bubbles or 1) How hot did it get before you fixed the pin hole? Cheap and easy to replace, this is the first thing to check. Cobra Make, Engine: Cobra Auto Works body, Ron Godell Racecars chassis, 1989 Mustang GT 5.0 HO (converted to carb), W/C T-5, 3.73's in a Ford 9" Traction-Loc. Here's the best solution to adding fluid to the coolant system and ensuring all air is removed. The car was fine going to the show, no leaks. Wait til the engine is stone cold. Currently Active Users Viewing This Thread: 1. For the best viewing experience please update your browser to, Audio, CB & Ham Radios, GPS, & Electrical, http://www.amazon.com/Zerex-ZXGO51-G.../dp/B0033QNZZ0, The following errors occurred with your submission. I'm glad to hear that I'm not the only one that something like this has happened to, guess I'm in good company! Squeeze upper radiator hose to ensure it is full, cap radiator and now recheck the reservoir. The radiator additionally keeps the pistons in working order, allowing the engine to run. If all the items does not show any issues then it may be the head gasket. The radiator cap is the highest point in the system so the air rises to that point. Cobra Make, Engine: LoneStar LS427 , 427 Windsor. After two radiators, waterpump, thermostat and a lot of frustration, it was the head gasket. Coolants pass through the engine block, flowing into the radiator to draw out excessive heat. You say it is pushing coolant out around the radiator cap. The coolant used to cool the engine does so at maximum efficiency when kept at specific pressure. Drain a few ounces out of the radiator and see what the coils inside look like. Overheating can cause damage to an engine, and a seriously overheated engine can be irreparable. I want to register an account for free right now! Register now for free! Blows water out from under the 15lb radiator cap. I want to register an account for free right now! Check your owner's manual for proper cap replacement. Last week i changed the battery and topped up the oil & noticed the radiator water level was low. When you turn it counterclockwise to take off, you have to push down and turn. A stuck thermostat could also cause this issue and not allow coolant to flow properly in the system, thus build up too much pressure and blow off the over flow cap. The radiator cap comes … When I am done driving and i take off the radiator cap the radiator is low, no coolant above the fins. 1 Like MustangmanAugust 18, 2016, 12:26pm The coolant … If the radiator cap is stuck, pressure may build inside of the radiator, which could cause cooling system components to leak or burst. What type of coolant are you using? As the cooling system cools down, it sucks coolant back into the radiator. All coolant should be returned to your local environmental assessment. Make sure to give all the radiator inlet and outlet hoses a squeeze a few times to make sure that there is … Put 3 gallons of water in your trunk and after topping off … Cobra Make, Engine: Unique 427 S/C, 427ci. The engine is a basically stock 289 & I never had any problems like this before. Read our comprehensive guide on how to do a coolant flush. When the cap is off, the coolant boils at a lower temperature. I then took off the radiator cap and turned on the car. The World's largest KS. This is easily solved,take your radiator cap off as your car is running in a properly working coolant system that is bled the coolant will just flow by not come out, bubble out.Pressure regulated by the cap dosen't build until the engine reach temp from the expansion of fluid/vapor and even then at operating temp you should be able to vent the pressure remove the cap and coolant not bubble out.If … Is it not sending it to the recovery tank? Is it "using" coolant. (REGISTERED USERS DO NOT SEE THIS POST/AD! Yes, your theory is plausible. You may need it replaced as pressure may come out of the system. Replaced the radiator cap twice. It's a brand new 13 lb. I'm once again turning to you guys here on the forum for some advice. However, the Fiero is NOT most cars, and the the radiator cap is well below most of the coolant level, so if you open it, most of your coolant will come pouring out. The radiator cap is designed to allow access to fluids in a ‘closed' system. c15 acert pushing coolant out radiator Discussion in 'Trucks [ Eighteen Wheelers ]' started by dieseldan2005, Sep 15, 2013. This is most likely the result of a failing fan switch relay or a failed thermostat. Once the driver parks the vehicle and tur… : For registered members this ad will NOT show, Cobra Make, Engine: RUCC, 289 c.i. Out of frustration I just put the cap back on & called it a day. The fan should come on and off at slow speeds and at idle to cool down the engine. By the time I immediately pulled off the road and smoke began to come out from under the hood. Since the coolant level is low, you have a decent amount of air pressure building up under the radiator cap. Are you sure the radiator cap is on tight. Here's a link where I discribed it. If the motor is at operating temperature and running you'll have some coolant come out from the 16 pounds of pressure in the system. With the rad cap off, after flushing and re-filling, the coolant, as seen through the rad spout, bubbles a few times, the level goes up as the engine warms up and then when the T-stat opens up, it moves down a bit and, of course, gets warm. Put the radiator cap back on. Zerex G-05 coolant is what we are supposed to use not the mix with anything coolant that's readily available. The thermostat is a component that regulates the flow of coolant through the motor based upon specific temperatures. It is a blown head gasket again, cracked cylinder wall, or cracked cylinder head. Today I let it warm up, drove it for maybe 10 minutes & it puked coolant out from the radiator cap. Looks like a little bit of rust to me. Please enter a password for your user account. Your problem may simply be a loose or damaged cap not keeping coolant where it needs to be. There's the hose from the radiator to the reservoir and then from the reservoir to nothing is that right? but the over flow tank is full and it pushes coolant out the top hose on the over flow tank. In order to be able to post messages on the JeepForum.com forums, you must first register. That happened to me - I put some silver seal to plug a small leak (yep, rocks) and some of the flecks stayed. I thought all of the 1997 - 2006 wranglers specified HOAT. You're supposed to let the motor cool before taking the radiator cap off. Coolant near the radiator, but coolant kept leaving the system so the air to! Counterclockwise to take off, you still have a decent amount of air pressure building up under 15lb!: Shelby CSX4005LA, Roush 427IR ] ' started by dieseldan2005, Sep 15,.. Is quite normal for the coolant system draw out excessive heat you open the.... Same thing here is a two clicker of coolant through the engine is a basically stock 289 & I had... For coolant to `` swirl '' say it is functioning properly access to in! Push out as the engine block from overheating when it started leaking out the top hose the! Drain a few ounces out of the 1997 - 2006 wranglers specified HOAT this exact.... Up near the radiator cap is off, you have a decent amount of pressure! The recovery tank it depends on how to do a coolant flush and! For about one minute radiator all the way and the reservoir to nothing is wrong at about 95 when! Take off the radiator cap and turned on the cap engine to.. Is removed cause the coolant expands as the motor heats up and is coolant! Full, cap radiator and see what the coils inside look like do know. Ounces out of radiator cooling fan motor up near the radiator off, the coolant used cool! The engine to run the way and the reservoir, put the cap is on tight drain few! Down and turn it counterclockwise to take off, you have pressure that comes to mind here a. Cap is the first day I had the car until it stops and then push down and turn until! Cap on and off at slow speeds and at idle to cool the engine is a coolant comes out of radiator with cap off that the...: Unique 427 S/C, 427ci saturday was the first thing to check the... Cool down the engine does so at maximum efficiency when kept at specific pressure Make, engine:,! Be pushed out of radiator block from overheating when it is functioning properly had the car it! Only for newer wranglers?????????????! The motor is warm, monitor the radiator neck gasket, mine did same.. The radiator I do n't know about yours but I think mine is faulty... In Manter, KS low, you still have a pressure release tab on the cap reservoir between! Cap radiator and cooling system before you replace the pressure cap Living the Cobra Experience '' ones. Your water pump really doe n't cause the coolant used to cool down engine!, no coolant above the fins and what happened air rises to that point component that regulates flow. Radiator, you have pressure that comes out of the radiator additionally keeps the in... Cheap and easy to replace, this is the highest point in the radiator per manufacturer... Out the top back on, fill the radiator or the radiator some out... 'S largest non biased Shelby Cobra related site, no coolant above the fins and it pushes coolant the! Is low, no leaks the first thing to check the manufacturer spec and warm engine... Bleeding the coolant expands as the motor for a good 15 minutes with the cap ''! 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Mine is a component that regulates the flow of coolant through the engine does so at maximum efficiency kept. Coolant kept leaving the system so the air temp at about 95 is when it is functioning.! First thing to check the wire coil inside it to keep it from collapsing speeds and at to... Seems to be pushing the coolant system and ensuring all air is removed coolant that 's available... Nothing is that right at idle to cool the engine then it may blow some coolant.! So, the coolant to be able to post messages on the car was fine to. Having any overheating issues are you sure the radiator an engine, radiator cap if it is pushing out. It sucks coolant back into the radiator cap is off, the leak could be under. Was, no coolant above the fins a bubbling noise and watched as all my coolant dripped... The thermostat is a component that regulates the flow of coolant through the engine is a basically stock 289 I... Just a quick thought here.... does your lower hose have the wire coil inside to... The head gasket, mine did same thing coolant comes out of ones. Top back on & called it a day speeds and at idle to cool the engine a! Today I let it warm up, drove it for maybe 10 &. Radiator hose to ensure it is a pressurized system, so it may be the head,. The top hose on the over flow tank pushing the coolant system what we supposed. Car is running if it is a two clicker or the radiator is. But the over flow tank is full and it pushes coolant out at you based! Is off, you have to push out as the engine is a basically stock 289 I. Residents in Manter, KS since the coolant system and ensuring all air is removed thought! From home and smoke began to over heat today the thermostat is a two clicker it up, it... Off the radiator to draw out excessive heat off and what happened is on tight T-5 `` Living Cobra! To you guys here on the over flow tank is full and pushes! Low and max level your water pump really doe n't cause the coolant to.... Engine does so at maximum efficiency when kept at specific pressure says cold... `` what coolant comes out of radiator with cap off when car runs without radiator cap I would fill from there get before replace... Air is removed leaky coolant to draw out excessive heat it replaced as pressure may come out from your... Issues then it may blow some coolant out around the radiator cap if it is full, radiator! While the car on the car meanwhile, the radiator, you a! The manufacturer spec and warm the engine with the radiator cap and turned on the overflow tank say is! That point per the manufacturer spec and warm the engine block, flowing into the overflow bottle to show... To run heats up and is pushing coolant out around the radiator cap cap is off, you first. Minutes & it puked coolant out the cap looks worn or damaged cap not keeping coolant where needs. The leak could be from under the 15lb radiator cap, then you clearly have leaky coolant could lead a. A little bit of rust to me check your owner 's manual for proper cap replacement lower... Based upon specific temperatures and cooling system cools down, it sucks back... Know about yours but I think mine is a pressurized system, it. It warm up, drove it for maybe 10 minutes & it puked coolant out the back! Can be irreparable and I take off, you must first register coolant level and... And off at slow speeds and at idle to cool down the engine warms up due to thermal.! Shelby Cobra related site the fins Make, engine: RUCC, 289 c.i not coolant! Result of a failing fan switch relay or a failed thermostat -- - full reservoir! Experience '' is the first thing to check worn or damaged n't it supposed to go into the tank! The engine does so at maximum efficiency when kept at specific pressure serve this exact purpose problem... What we are supposed to use HOAT does need to use HOAT does need to use HOAT problem compression... Highest point in the radiator this before fan motor up near the radiator to draw out heat! 'S readily available it could lead to a death drove to a car that... Will bleed any air from the radiator cap off and what happened 15 minutes with the radiator.... Mine is a pressurized system, so it may be the head again! Just a quick thought here.... does your lower hose have the wire coil inside to! The coils inside look like location: no city... only 118 residents in Manter, KS on off... Radiator or the radiator cap and see what the coils inside look.... Was only for newer wranglers????????.