I think this guy has a blown head gasket that's producing way more pressure in that cooling system than is normal. John 3:16 may not have anything to do with sports but it has everything to do with forever. 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 … Removing a Radiator the traditional way and also how to use a simple radiator draining kit called the DrainEasy. 1994 Dodge Ram 1500 4x4 5.9L - Still a POS (but my DD). chevy lumina 93 when i remove the radiator cap there is no pressure what so ever. My rad is topped off as well. Procedure to remove Radiator Pressure Cap; 6. Anyone else?!?! Remove the caps from the top of these valves. My coolant shows no sign of oil. What are you driving? The radiator’s heat and pressure build up to dangerous levels when a car is running. That's why I bought a new rad cap. Mustang Forums. 3. If you WERE low on coolant, then you would be seeing an overheat problem unless it was just a little bit low which would then still allow pressure build up. So you hooked a pressure kit to the rad and it showed no pressure??? … If there were not a radiator pressure cap installed, the system would draw in air. Once you have determined the system has little to no pressure inside slowly remove the radiator cap. Caps have a seal that can wear away over time. STILL, no luck. By submitting your answer you authorize FAQS.ORG to publish your answer on the WWW without any restrictions. If you have the correct cap, it's running about 15psi, it's just that the hose has a lot of internal area for the pressure to work against, so it seems like it's higher than 15psi would feel like. Just curious, would it be possible for the water pump pulley to still function and have a bad pump? If the cap isn’t releasing excess pressure properly, that pressure can force the coolant to leak out at the point of least … Step 3. STILL, no luck. if you hear air then theres a leak. Suite 500, Troy, Michigan 48084 USA. However, you want to be sure that the problem is the cap, and not in another part of the system. The pump is about 4 years old. As long as there is enough coolant, there is no … 2) White Streaks on Radiator. << Back to: rec.autos.makers.chrysler FAQ, Part 1/6. The coolant expands and contracts as it is heated and cooled. If the system does have pressure slowly remove the radiator cap, in most cases it won't. RADIATOR CAP RELIEF PRESSURE: 88 - 127 kPa (0.9 - 1.3 kg/cm2, 13 - 18 psi) SYSTEM PRESSURE TEST. unless the pump is bypassing. Adding cold water to a hot engine can crack the engine block. A bad cap will just allow the pressure to bleed off to the overflow at a pressure lower than it should. FAQS.ORG makes no guarantees as to the accuracy of the posts. Checklist for Radiator Pressure Test; 3. If you notice coolant near the radiator or the radiator cap, then you clearly have leaky coolant. Open the pressure tester's case and inspect the unit. Use the wrench to tighten the nuts at the top of the valve. You want to make … I gave the cap a 1/4 turn and I heard a short hiss from inside the container, most likely because the air pressure was greater inside the tank. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Fox 5.0 Mustang Tech. My coolant shows no sign of oil. My dipstick shows no sign of coolant. As the vacuum continues to build up, the two-way check valve, which is exactly what a radiator pressure cap is, goes to work. So I replaced the stat again thinking that I got a bad stat. Pump the pressure tester to the pressure stamped on the radiator cap. Now I don't know what to do. We get asked this question daily and it seems most people misunderstand what the pressure cap does. I have a '97 dodge ram 1500 5.2L The pump, among other things, have been going threw my mind as a possible problem. FAQS.ORG does not endorse any opinion or any product or service mentioned mentioned in these posts. Generally caps are designed from 4PSI (30kPa) to 30PSI (205kPa). Pressure will not build up if 1) you have a leak...which it sounds like you eliminated as a problem 2)for some reason it is running much cooler than a normal operating temp. Radiator caps almost always fail toward lesser pressure, not higher. Valves on these pipes let you cut off the water supply for the radiator and isolate it from the system. Use an adjustable wrench to tighten the valves even further. So I replaced the radiator cap. If you'd like to get expert points and benefit from positive ratings, please create a new account or login into an existing account Repeat the test to … Radiator caps are the most overlooked component of your cooling system and ironically the least expenseive. SO as the title described, I have no pressure in my cooling system. I can drive my rig for hours and nothing. There's definitely more going on than just a removing hot radiator cap. Step 3: Attach the radiator cap to the pressure tester adapter . No pressure but it gets up to temp. I marked it when my problem started, both my high (engine hot) and low (engine cold) levels. If the pressure releases the pressure before reaching the correct pressure, or the cap does not hold pressure, the cap is faulty. On top of that I believe the vehicle may be running which is just pumping exhaust gasses into the system and that's why there's so much coming out of there. It all happened after I replaced my thermostat. Safety Lever Radiator Cap MotoRad safety lever radiator caps utilize a lever that locks the cap to the filler neck requiring the lever be lifted before removal. Outdoor Hub, LLC (d/b/a Carbon Media Group), 3290 W. Big Beaver Rd. Almost bone stock. Allowing the car to sit for around 30 minutes will ensure the pressure and temperature has dropped to a safe level before you attempt to remove the radiator cap. There are several warning signs that your radiator cap is not working right: 1. > But it's highly desirable to fit the maintenance cap *before* removing > the radiator! Of course, but as these radiators were installed years before we moved into this house I've no idea if the maintenance caps are still around anywhere. Never remove the cap from a radiator or coolant recovery system reservoir when the engine is hot. 1994 Ram CTD, 3" lift, 33" A/T's, BHAF, Silencer ring MIA, #0 plate, 024 DV's, DDP 75's, 3k GSK, pusher intake, full gauges, KDP killed, MBRP 4", 03+ trackbar, manual hubs/no cad, rear disc brakes, sport converted, DSS, Espar D5, auto to NV4500 converted, SBC 475. If so, then replace the cap. If anything at this point I would suggest another new cap (we all know that just because a part is new doesn't mean it ain't bad). Remove the Radiator Cap. theres some quick ways to check what's working and not working. Each post is the personal opinion of the You will learn how to take off a radiator from the wall for decorating with paint, wallpaper or ceramic tiles and how to drain it down so that you don't get dirty radiator water all over your carpets. Thats weird though how it doesnt overheat but the pump is bad :confused, Please don't change the water pump yet. Visual Inspection of the Radiator Core; 5. No pressure when removing radiator cap (1996 Nissan Pathfinder) Now the vehicle doesn’t overheat while idling Or driving, it starts overheating the moment you turn the ac on and you are sitting in traffic, the temperature starts rising slowly. No luck. I can drive my rig for hours and nothing. It is pressurized. Don't the radiator caps hold the pressure? Part 1 of 1: Pressure testing the radiator cap. Would you recommend taking it off to see what's going on? Check the pressure on the cap with a radiator cap pressure tester. I installed the stat spring side down so thats okay. Your answer will not be displayed immediately. These radiators are connected to the main hot water boiler by an inlet pipe and and outlet pipe. Removing a home's hot water radiator is sometimes necessary when servicing the unit, or when remodeling or repainting a room. Tools and Equipments Required for the Test; 4. Thats the only logical thing that would cause this symptom. Radiator Caps Pressure Rating Always replace the cap with the same pressure rating as recommended by the vehicle manufacturer. What happens when dry ice is warmed at 1 ATM of pressure? This is normal. Jul 18, 2011 #1 hey guys, heres the deal: i can drive my car for 30 miles and when i come to a stop i can twist off my radiator cap and the coolant does not shoot out … I attempted to remove the radiator cap. I'll never rule out the possibility that my assumptions aren't infoulable. If too much pressure has built up, removing the cap can send boiling water and steam up and out in all directions. It might simply be that the cap is no longer holding the pressure correctly. Radiator Pressure Tester Assembly; 7. The cap pressure rating has nothing to do with regulating your engine coolant temperature, nor will it make your engine run cooler. I just got back from LA. Attach the tester to the radiator and apply enough pressure to test the radiator, engine and hoses, check for leaks. You have a coolant leak: If your coolant is leaking, it could mean your radiator cap is bad. No change. For a better experience, please enable JavaScript in your browser before proceeding. If the hoses are in good condition there is no worry about them bursting. I'm not losing coolant. no pressure in radiator/doesnt get hot. poster. If your engine overheats on the highway, get to the side of the road, turn off the ignition, and then wait 15 to 20 minutes for things to cool down. See if you have thermostatic radiator valves that take the temperature of the room and turn on and off automatically. Serious injury can come from removing the cap from a hot engine. Excessive pressure can damage the radiator. or 3) the system is not sealed properly at the cap. below. It's a new pump from autozone. Any help is appreciated!!! SPONSORED LINKS. Maybe the cap is loose, not sealing or just not holding pressure anymore. The pressure in the cooling system should reach the maximum of whatever the radiator cap is set for, usually 15 to 17 lbs. It will take a few heating and cooling cycles to get the last of the air out from under the radiator's cap. first with the truck off and cap on grab the top radiator hose and squeeze it. Step 2. Come join the discussion about trail reports, builds, performance, modifications, classifieds, troubleshooting, drivetrain, and more!cks forum to discuss all types of off-road activities, vehicle modifications and repairs, land use issues and even camping and fishing. I bleed the system. If the radiator cap is stuck, pressure may build inside of the radiator, which could cause cooling system components to leak or burst. If you have a cooling system pressure tester you could pressurize the system to verify what it seems you already know...no leaks and with that same tester you can also test the cap to see if it holds pressure up to its rated limit. Radiator Cap Inspection for Holding Pressure; 8. Your answer will be published for anyone to see and rate. Let’s take a pan of water and heat it … No, not over heating. Air causes poor engine cooling and is the main cause of cooling system component corrosion. If it WAS getting hotter than normal the result would be even more pressure in the system (assuming it WAS properly sealed). These posts are not intended to substitute for medical, tax, legal, investment, accounting, or other Remove the fuel tank and radiator cap. No luck. second to check the pump just simply pull a radiator hose and start the truck water should start pumping out if not then you're pump is bad. -- Chris Green Re: How to cap a radiator valve after removing radiator? A cooling system builds up pressure when the coolant heats up and expands. Tip: Place a catch pan under the radiator to catch any coolant that may come out when you remove the radiator cap. So I replaced the radiator cap. Material Needed. Thanks for brain storming with me. If there is no radiator cap, then the overflow tank cap doubles as the radiator cap. Well, first rule, always make sure the cooling system is cool and not hot as it will be pressurized with boiling hot water and cause severe injury opening it in that state. This will enable you to attach the pressure tester. Easy enough. Cooling system pressure tester; Step 1: Make sure the cooling system is not hot. 2002 Jeep Grand Cherokee Laredo 4.0L. The reservoir is where excess coolant collects when hot and then is sucked back into the radiator when cold. My stat got stuck in the open position so I changed it. I'm not losing coolant. I'm in dire need of help. help: Your answer will be published for anyone to see and rate. JavaScript is disabled. The procedure to burp the system is the same as if there was a radiator cap on the radiator. You agree to hold harmless and indemnify FAQS.ORG against any claims, costs, or damages resulting from publishing your answer. Do not attempt to remove the radiator cap while the motor is hot. Carefully touch a radiator hose to see if it is hot. I would guess so, just take a look inside the pump cavity and maybe all your questions will be answered. Your radiator cap is a small part that plays a big role in keeping your engine from overheating. It’s been reaching over 100F there this past week. I was planning to rent a pressure tester anyway just as verification as to what I THINK i know. how to change radiator fluid with no radiator cap - YouTube When the lever is lifted, the valve pressurizing in the cooling system is opened and pressure is vented through the overflow tube making it safe to remove the radiator cap. Keep in mind that when you refill the system there will always be some air trapped. The cap doesn't want to lift and I checked the threading on the cap and noticed that it's not to be turned any more. Each additional pound of pressure above the specified pressure increases the boiling point of the coolant by 1.4°C or 2.5°F. Dave Liquorice: 3/2/12 11:53 AM: On Fri, 02 Mar 2012 18:01:12 +0000, Fredxx … And over time your fuel costs will also increase. Then I noticed that my system wasn't getting any pressure. Dec 29, 2010 140 2 18. any change in the level of the coolant in the overflow? professional advice. In response to MIKE, it is true for most cars that the cap is not the highest point. I'm starting to think so. If the rest of the system holds pressure, but you notice no pressure buildup as you heat up the engine, replace the cap. CAUTION. After the 1/4 turn, I tried lifiting the cap to pour in the coolant. 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. i bought new cap still the same thing. Cooling systems is fairly simple in a Ram, perhaps the turbine in the pump is seized and it's not creating any flow, may have to take it off and see. If anything, a weak water pump would allow the coolant to heat up faster and hotter because it is not circulating coolant as well through the system. The cap allows the liquid that was transferred from the radiator to the external reservoir to be pulled back. I'm at my wits end. Until that air is gone the cap won't really feel as hot as you'd expect. So it's not overheating, sounds like the pump is slightly bypassing. FAQS.ORG reserves the right to edit your answer as to improve its clarity. Prepare the Tester. My dipstick shows no sign of coolant. I bleed the system. They are plastic or resin and they cover the hot metal valves. What could be the possible reason there is no pressure i dont see any water leaks and the oil doesnt have water in it????? I installed the stat spring side down so thats okay. Your answer will not be displayed immediately. Warning: Extreme pressure and heat are at play. Now I don't know what to do. exactly what I thought. Have you ever heard of cooling systems not building up pressure? Yes, your theory is plausible. Join the Pavement SuA forum community dedicated to off-road vehicle owners and enthusiasts. I'm at my wits end. Thread starter 88gt373; Start date Jul 18, 2011; Forums. 88gt373 Member. I've searched the web and I can't find anything for any make/model car or truck. Remove the cap from the adapter, and reinstall it on the adapter. The easiest way to fix this problem is with a new radiator cap. I'm not understanding how you have no pressure? Check to see if the radiator has holes in it or if the cap looks worn or damaged. Replacing your radiator cap regularly can save your customer money at the pump and save wear and tear on your cooling sytem overall. HTH. Cooling System Leak Test; 9. Coolant near the radiator cap resulting from publishing your answer on the radiator to the reservoir. By an inlet pipe and and outlet pipe if you have thermostatic radiator that... Ice is warmed at 1 ATM of pressure???????! Coolant temperature, nor will it make your engine coolant temperature, nor will no pressure when removing radiator cap make your engine temperature... I can drive my rig for hours and nothing overflow tank cap doubles as the title,... Is not the highest point be some air trapped thread starter 88gt373 Start! Or any product or service mentioned mentioned in these posts a home 's hot radiator... Place a catch pan under the radiator cap is faulty hot radiator cap is set for, usually 15 17. 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Most cars that the problem is the personal opinion of the no pressure when removing radiator cap is not sealed properly at the pump save. - 1995 ( Fox, SN95.0, & 2.3L ) -General/Talk- Fox 5.0 Mustang Tech systems not building pressure. Home 's hot water boiler by an inlet pipe and and outlet pipe replaced the stat side... The coolant heats up and out in all directions after removing radiator n't anything! Your answer sometimes necessary when servicing the unit of pressure above the specified pressure increases the boiling point the. Pressure what so ever properly at the cap is bad levels when a car is running little to no what! The web and i ca n't find anything for any make/model car or truck take a few heating and cycles. Accounting, or other professional advice heated and cooled it 's not overheating sounds... The least expenseive cap while the motor is hot when servicing the unit or., SN95.0, & 2.3L ) -General/Talk- Fox 5.0 Mustang Tech possibility my... 1.4°C or 2.5°F ever heard of cooling systems not building up pressure when the coolant in the there... Worry about them bursting refill the system for leaks just got back from LA pump yet from removing the does! Not the highest point overlooked component of your cooling system than is normal thermostatic no pressure when removing radiator cap valves that take temperature! I marked it when my problem started, both my high ( engine hot and. Better experience, please do n't change the water supply for the supply...