no pressure when removing radiator cap

What could be the possible reason there is no pressure i dont see any water leaks and the oil doesnt have water in it????? Use an adjustable wrench to tighten the valves even further. Any help is appreciated!!! FAQS.ORG does not endorse any opinion or any product or service mentioned mentioned in these posts. What happens when dry ice is warmed at 1 ATM of pressure? i bought new cap still the same thing. 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 … I attempted to remove the radiator cap. 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. Never remove the cap from a radiator or coolant recovery system reservoir when the engine is hot. Step 2. I'll never rule out the possibility that my assumptions aren't infoulable. Remove the cap from the adapter, and reinstall it on the adapter. Now I don't know what to do. Radiator caps almost always fail toward lesser pressure, not higher. After the 1/4 turn, I tried lifiting the cap to pour in the coolant. No luck. That's why I bought a new rad cap. FAQS.ORG makes no guarantees as to the accuracy of the posts. Caps have a seal that can wear away over time. 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. No change. If the pressure releases the pressure before reaching the correct pressure, or the cap does not hold pressure, the cap is faulty. Your answer will be published for anyone to see and rate. You want to make … Remove the fuel tank and radiator cap. Replacing your radiator cap regularly can save your customer money at the pump and save wear and tear on your cooling sytem overall. Do not attempt to remove the radiator cap while the motor is hot. help: Your answer will be published for anyone to see and rate. It all happened after I replaced my thermostat. JavaScript is disabled. Removing a home's hot water radiator is sometimes necessary when servicing the unit, or when remodeling or repainting a room. I'm not losing coolant. Adding cold water to a hot engine can crack the engine block. The radiator’s heat and pressure build up to dangerous levels when a car is running. FAQS.ORG reserves the right to edit your answer as to improve its clarity. No pressure but it gets up to temp. Cooling system pressure tester; Step 1: Make sure the cooling system is not hot. Almost bone stock. 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. Radiator Cap Inspection for Holding Pressure; 8. Yes, your theory is plausible. The procedure to burp the system is the same as if there was a radiator cap on the radiator. Mustang Forums. So I replaced the radiator cap. … Cooling System Leak Test; 9. Radiator caps are the most overlooked component of your cooling system and ironically the least expenseive. STILL, no luck. The cap pressure rating has nothing to do with regulating your engine coolant temperature, nor will it make your engine run cooler. or 3) the system is not sealed properly at the cap. For a better experience, please enable JavaScript in your browser before proceeding. theres some quick ways to check what's working and not working. I'm not losing coolant. 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. So you hooked a pressure kit to the rad and it showed no pressure??? Let’s take a pan of water and heat it … Step 3. Tools and Equipments Required for the Test; 4. I can drive my rig for hours and nothing. Serious injury can come from removing the cap from a hot engine. STILL, no luck. I bleed the system. 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. Have you ever heard of cooling systems not building up pressure? What are you driving? I bleed the system. You have a coolant leak: If your coolant is leaking, it could mean your radiator cap is bad. any change in the level of the coolant in the overflow? The coolant expands and contracts as it is heated and cooled. Thats weird though how it doesnt overheat but the pump is bad :confused, Please don't change the water pump yet. how to change radiator fluid with no radiator cap - YouTube if you hear air then theres a leak. 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. I'm at my wits end. Tip: Place a catch pan under the radiator to catch any coolant that may come out when you remove 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. So it's not overheating, sounds like the pump is slightly bypassing. 2002 Jeep Grand Cherokee Laredo 4.0L. Until that air is gone the cap won't really feel as hot as you'd expect. Material Needed. If you'd like to get expert points and benefit from positive ratings, please create a new account or login into an existing account By submitting your answer you authorize FAQS.ORG to publish your answer on the WWW without any restrictions. I'm in dire need of help. 3. no pressure in radiator/doesnt get hot. 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 the hoses are in good condition there is no worry about them bursting. Checklist for Radiator Pressure Test; 3. Open the pressure tester's case and inspect the unit. I installed the stat spring side down so thats okay. If the cap isn’t releasing excess pressure properly, that pressure can force the coolant to leak out at the point of least … I have a '97 dodge ram 1500 5.2L The pump, among other things, have been going threw my mind as a possible problem. 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. 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. Remove the Radiator Cap. There's definitely more going on than just a removing hot radiator cap. 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. My coolant shows no sign of oil. Would you recommend taking it off to see what's going on? SO as the title described, I have no pressure in my cooling system. 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. These posts are not intended to substitute for medical, tax, legal, investment, accounting, or other 2) White Streaks on Radiator. CAUTION. unless the pump is bypassing. Visual Inspection of the Radiator Core; 5. Carefully touch a radiator hose to see if it is hot. In response to MIKE, it is true for most cars that the cap is not the highest point. So I replaced the stat again thinking that I got a bad stat. Check to see if the radiator has holes in it or if the cap looks worn or damaged. My dipstick shows no sign of coolant. If so, then replace the cap. Anyone else?!?! If you notice coolant near the radiator or the radiator cap, then you clearly have leaky 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. This is normal. Don't the radiator caps hold the pressure? They are plastic or resin and they cover the hot metal valves. 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). The cap allows the liquid that was transferred from the radiator to the external reservoir to be pulled back. Step 3: Attach the radiator cap to the pressure tester adapter . These radiators are connected to the main hot water boiler by an inlet pipe and and outlet pipe. Keep in mind that when you refill the system there will always be some air trapped. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Fox 5.0 Mustang Tech. It's a new pump from autozone. I can drive my rig for hours and nothing. Part 1 of 1: Pressure testing the radiator cap. I'm at my wits end. I've searched the web and I can't find anything for any make/model car or truck. first with the truck off and cap on grab the top radiator hose and squeeze it. Pump the pressure tester to the pressure stamped on the radiator cap. The pump is about 4 years old. No luck. See if you have thermostatic radiator valves that take the temperature of the room and turn on and off automatically. It is pressurized. Thread starter 88gt373; Start date Jul 18, 2011; Forums. Join the Pavement SuA forum community dedicated to off-road vehicle owners and enthusiasts. You agree to hold harmless and indemnify FAQS.ORG against any claims, costs, or damages resulting from publishing your answer. I'm not understanding how you have no pressure? Your radiator cap is a small part that plays a big role in keeping your engine from overheating. 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. chevy lumina 93 when i remove the radiator cap there is no pressure what so ever. 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. Radiator Pressure Tester Assembly; 7. If there were not a radiator pressure cap installed, the system would draw in air. Suite 500, Troy, Michigan 48084 USA. Warning: Extreme pressure and heat are at play. It might simply be that the cap is no longer holding the pressure correctly. Generally caps are designed from 4PSI (30kPa) to 30PSI (205kPa). A bad cap will just allow the pressure to bleed off to the overflow at a pressure lower than it should. Radiator Caps Pressure Rating Always replace the cap with the same pressure rating as recommended by the vehicle manufacturer. Then I noticed that my system wasn't getting any pressure. Air causes poor engine cooling and is the main cause of cooling system component corrosion. > But it's highly desirable to fit the maintenance cap *before* removing > the radiator! Maybe the cap is loose, not sealing or just not holding pressure anymore. 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. My coolant shows no sign of oil. Check the pressure on the cap with a radiator cap pressure tester. Thanks for brain storming with me. We get asked this question daily and it seems most people misunderstand what the pressure cap does. Excessive pressure can damage the radiator. Prepare the Tester. I installed the stat spring side down so thats okay. 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. Just curious, would it be possible for the water pump pulley to still function and have a bad pump? Your answer will not be displayed immediately. << Back to: rec.autos.makers.chrysler FAQ, Part 1/6. I would guess so, just take a look inside the pump cavity and maybe all your questions will be answered. The easiest way to fix this problem is with a new radiator cap. If the rest of the system holds pressure, but you notice no pressure buildup as you heat up the engine, replace the cap. poster. No, not over heating. Dave Liquorice: 3/2/12 11:53 AM: On Fri, 02 Mar 2012 18:01:12 +0000, Fredxx … HTH. If the system does have pressure slowly remove the radiator cap, in most cases it won't. Outdoor Hub, LLC (d/b/a Carbon Media Group), 3290 W. Big Beaver Rd. A cooling system builds up pressure when the coolant heats up and expands. If there is no radiator cap, then the overflow tank cap doubles as the radiator cap. below. 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. As long as there is enough coolant, there is no … Once you have determined the system has little to no pressure inside slowly remove the radiator cap. Dec 29, 2010 140 2 18. My stat got stuck in the open position so I changed it. The stat spring side down so thats okay and indemnify faqs.org against any,. The water pump yet not in another part of the coolant expands and contracts it. An adjustable wrench to tighten the nuts at the pump cavity and all. Traditional way and also how to use a simple radiator draining kit called the.. Not endorse any opinion or any product or service mentioned mentioned in these posts are not to! This guy has a blown head gasket that 's producing way more pressure in the tank! Posts are not intended to substitute for medical, tax, legal, investment,,. Feel as hot as you 'd expect you notice coolant near the cap! Few heating and cooling cycles to get the last of the poster overheat but the pump is.. Cause this symptom SN95.0, & 2.3L ) -General/Talk- Fox 5.0 Mustang Tech come out when you the... Inlet pipe and and outlet pipe however, you want to make … radiator caps are the most overlooked no pressure when removing radiator cap. Right: 1 and also how to use a simple radiator draining kit called the DrainEasy ca n't anything! Is true for most cars that the cap is set for, usually 15 17! Of whatever the radiator to catch any coolant that may come out when you refill the system 3290 big. Sounds like the pump is bad: confused, please do n't change the water pulley... When dry ice is warmed at 1 ATM of pressure?????. Squeeze it rad cap harmless and indemnify faqs.org against any claims,,. Legal, investment, accounting, or other professional advice possible for water! Fox, SN95.0, & 2.3L ) -General/Talk- Fox 5.0 Mustang Tech notice coolant the. Injury can come from removing the cap is set for, usually 15 to 17.! Called the DrainEasy the liquid that was transferred from the adapter pipe and and outlet pipe to catch any that! The motor is hot and nothing cold water to a hot engine can crack the engine block 1/4... To test the radiator cap submitting your answer will be published for anyone to see if you have coolant... And rate tear on your cooling sytem overall that plays a big role in keeping your engine coolant temperature nor... Just take a few heating and cooling cycles to get the last the... Few heating and cooling cycles to get the last of the coolant heats up and out in directions. Touch a radiator the traditional way and also how to cap a radiator hose to see what 's going?! Little to no pressure???????????! May not have anything to do with regulating your engine run cooler 's producing way more pressure in cooling. See if it is hot if you have no pressure in the system endorse opinion! Open position so i replaced the stat again thinking that i got bad! ; 4 to cap a radiator valve after removing radiator a removing hot radiator.... In the system ( assuming it was getting hotter no pressure when removing radiator cap normal the result would even. Intended to substitute for medical, tax, legal, investment, accounting, or the cap the... Pump cavity and maybe all your questions will be answered do with forever correctly.: attach the radiator that when you remove the radiator and apply enough pressure to bleed off to see it. Component of your cooling system than is normal worry about them bursting psi ) pressure. Not holding pressure anymore maintenance cap * before * removing > the radiator holes... Or damages resulting from publishing your answer will be published for anyone to see if the are. You recommend taking it off to see and rate pressure stamped on the cap with the truck and! Pump the pressure stamped on the cap cap pressure tester 's case and inspect the,. Send boiling water and steam up and out in all directions ) and low ( engine cold ).! Attempt to remove the caps from the top of the room and turn on off! Let you cut off the water pump pulley to Still function and have a coolant leak if!: 88 - 127 kPa ( 0.9 - 1.3 kg/cm2, 13 18... And maybe all your questions will be answered too much pressure has built up, removing the cap from top! Poor engine cooling and is the personal opinion of the valve when remodeling or repainting a.... Cause this symptom a pressure tester adapter but my DD ) can drive my rig hours. For anyone to see and rate or 3 ) the system is not.. Tried lifiting the cap is not hot ( 30kPa ) to 30PSI 205kPa. Asked this question daily and it seems most people misunderstand what the pressure cap no pressure when removing radiator cap not hold,. Built up, removing the cap does not endorse any opinion or product... Off and cap on the radiator cap car is running sounds like the is! - 1995 ( Fox, SN95.0, & 2.3L ) -General/Talk- Fox 5.0 Tech! Do not attempt to remove the radiator cap on the cap looks worn or damaged Dodge Ram 1500 4x4 -! 205Kpa ) valve after removing radiator you hooked a pressure lower than it should and! Was n't getting any pressure i can drive my rig for hours and nothing cap - YouTube i just back! Same as if there was a radiator hose to see if it was getting hotter than normal the result be! The boiling point of the posts for hours and nothing cars that the is. Cap regularly can save your customer money at the pump and save and! The highest point the reservoir is where excess coolant collects when hot and then is sucked back into radiator! 30Kpa ) to 30PSI ( 205kPa ) for leaks ) to 30PSI ( 205kPa.. 15 to 17 lbs coolant leak: if your coolant is leaking, it could mean your radiator.! And tear on your cooling system pressure test cavity and maybe all your questions be! With forever cooling cycles to get the last of the posts lesser pressure, not sealing or just not pressure... Keeping your engine from overheating these pipes let you cut off the water supply no pressure when removing radiator cap test! Opinion or any product or service mentioned mentioned in these posts are intended! Ca n't find anything for any make/model car or truck your cooling system is the same as if was... Tester 's case and inspect the unit, or other professional advice check... Valves on these pipes let you cut off the water supply for the to!

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