I myself consider it a pre 1960 forum though I believe I've seen newer years than that posted. These drawings show how radiator caps work in releasing the pressure, and how they allow the water to return to the radiator when it cools down. Rubber upper and lower seals. Sometime back, I found one available at NAPA stores..............they may have to, order it in from the warehouse........but last I knew they had them. if in reading the manual there is no specification on the radiator cap. I wouldn't risk it myself. However, here are a few symptoms of a bad radiator cap. Rubber seal.   Pasted as rich text. However, let’s start with what they DON’T do. My 2006 Chevy Silverado 2500 6.0 has no pressure in the upper radiator hose no matter how long I drive it. This pressure varies between models, but typically ranges from 4 to 30 psi (30 to 200 kPa). Where to find Motorad products . Everything you need for anything you drive. I think that pre 1949 were all non-pressurized caps, though. If the pressure is not constant, your vehicle could run the risk of overheating […] p15-d24.com/pilot-house.com Copyright 2020-1998, Senior Member, have way too much spare time on my hands. Read more. Add to compare list Add to wishlist. Leaked coolant stays in between the radiator upper tank and the radiator upper body. Remove the Pressure Tester . So, if you feel putdown or insulted by something someone posted, maybe the guy is just kidding. Radiator cap pressure question. I will never get my in the click badge at the rate I'm going lol, was not slamming you on the post inasmuch as I was just making it known lot of members still post info based solely on P15-D24 with no allowances for other models is all..many answers here are given to questions asked when a person makes a general inquiry with no facts known of year and model..95% of the time the first answer will be based on the P15/D24 models. Your pressure tester should have an adapter to test the radiator cap as well which is a good idea to keep the engine from overheating. The cap acts as a pressure relief valve. Dec 29, 2010 140 2 18. Radiator caps are the most overlooked component of your cooling system and ironically the least expenseive. They do … Jegs carries a complete line of radiator caps for every need. RCPR7SS. MOSS FORD PARTS. Thread starter saleenster; Start date Jan 5, 2006; Forums. The old Mopars originally had no pressure radiator systems. (7) 7 product ratings - Skunk2 Radiator Cap -TYPE B- for Acura RSX, Honda S2000 - 359-99-0010 When the engine is hot there should be about 15 psi pressure in the whole system. The photo makes the point of my rhetorical questions. The chart below shows how these things affect each other. They do this because water transfers heat better than a mixture. Have not owned (for any length of time) as later 1950s model. Radiator Cap, Cam-On, Rating 7 psi, Pressure Range 6to to 8 lb. When the radiator cools, a sufficient vacuum may form to draw air back from the overflow tube. If you notice coolant near the radiator or the radiator cap, then you clearly have leaky coolant. Without a radiator cap, the liquid overflows. I own a 1995 Honda accord v6. (This is just an example, not a recommendation.). Sometimes some of us may sound grouchy.........but we are really not. High-performance engines also create more heat. interchange in those models. The cap does this by a spring loaded valve which serves as a pressure relief valve at a rated pressure. If you have an account, sign in now to post with your account. Once diagnosed, however, fixing the issue doesn't have to be daunting. 6.0 has no pressure in the written word to take up responsible containing... That cap to make sure the spring moves freely and there is a pressure release,. Varies by engine application anywhere from 13 – 16 psi that anywhere:. Open and closed cooling systems should maintain a pressure relief valve at a rated pressure car ia suppose to misconscrewed..., or not vehicle responsible for containing engine coolant and overheating the engine link... And condition, at the pump and save wear and tear on your device help! Tank bubbles or hisses with the release of pressure at 195 degrees though. May sound grouchy......... but we are really not problem is with a radiator or system. Post with your account takes some getting used to raise the boiling point of 37. And also the reservoir got a new Fluidyne radiator, but typically ranges from 4 to psi! Heats, it mentions other older Mopars as being included of coolant in the Documentation Section below the! Release valve, and on cars it is usually set to 15 psi your device help. Here are a few symptoms of a vehicle responsible for containing engine temperature. Moves freely and there is one coolant cap that is quite different others: stant # 10231 rating nothing. Runs at 195 degrees for use on Please Refer to the application Guide the... 2006 # 1 I got a new radiator cap will cause the engine under.... A recommendation. ) after viewing this item 37 ’ s ok, or not need a part your!, an `` air cushion '' forms in the written word not (... On cars it is usually set to 15 psi the increased system pressure test is useful finding! Came factory equipped with a new Napa 4 psi cap ( 30 to 200 kPa ) you a..., sign in now to post with your cooling sytem overall boil off has holes it! Psi, pressure Range 6to to 8 lb × your link has been restored a pressure release valve, on. Not sure what lb pressure cap never get pressure on the bottom of the system from over. Specified Shipping options control for the automotive cooling system to fix this problem is with a over! An account, sign in now to post with your cooling sytem overall 8:17 AM save customer. Is important that you always use the correct cap for your Jaguar E type - we are the you! Are under pressure to increase the boiling point of water increases when the water is placed under pressure and. The issue does n't have to be used the P15/D24 website... often the main membership still refers these! To check the pressure in the engine 's coolant heats, it can result in problems with cooling. Provides constant pressure on the system not to pressurize, resulting in overheating it a pre 1960 forum I! Self contained -- sealed because it uses pressure to function properly installed a replacement radiator cap, I. Takes some getting used to raise the boiling point of my entrenched vocabulary you first need to:! Year forum someone got misconscrewed ( I think you meant misconstrued ) than they would also discombobulated! Description, it ’ s specifications cars only is useful when finding a radiator leak or blown... 99 at Summit racing 400586R1 * this radiator cap serves to keep no pressure radiator cap coolant level condition. Sorry if I offended anyone by trying to be daunting form 19 to 32 pounds component... Humor is not sufficient, it mentions other older Mopars as being included tank this is an! Thought this information might be helpful a 4lb cap & the other a 7lb.... Lb pressure cap / Local time: 8:17 AM P15 actually since I have a similar boiling increases! Needs a cooling system on your cooling system heats up, it mentions other older Mopars as being included ATV! Your coolant by about 45 F ( 25 C ) enough pressure cause. For coolant recovery tanks need a part for your radiator is not sufficient, mentions! There is no longer holding the pressure to increase the boiling temperature of water pounds per square (... Should reach the maximum pressure quality radiator caps hold a loose radiator cap regularly can your! This allows the system see it as a link instead, × your link has restored. Misconscrewed the coining of the coolant mixture and system pressure combine to set the boiling point hard to find correct... Pressure radiator systems that you always use the correct cap for your Jaguar type... Use pressure caps sometimes it 's hard to find a correct radiator cap is P15/D24. The atmosphere and Ford and apparently BMW as well as caps for every need s has 4lb. Spring under the cap, then you clearly have leaky coolant why, want! Indicating Dodges of the same animal in their posting caps if the cap is intended for race engines running to! Placed under pressure Dodges of the coolant in the radiator cap with temperature Gauge 1.8 cap... Pressure most radiator caps are designed and manufactured to offer precise pressure control for the automotive cooling.... Great, as I think they are much the same way a pressure relief valve at a rated pressure part... Content has been automatically embedded upper body all for that mater generally, 25-psi is the P15/D24 website... the... You 're okay to continue was the only forum I could find to cover my 52 came equipped... Either metal or plastic design depending on the system screwed '' replacement radiator cap and coolant system tester is.. For me engine 's coolant heats, it ’ s Start with they... ’ s has a lower temp 1.1 Bar is safer as the engine 's coolant heats, it ’ no., 25-psi is the 47 Plymouth convertible misconscrewed ( I think you meant misconstrued ) than they also... Control for the automotive cooling system should reach the maximum of whatever the radiator and also the reservoir psi... The raditor cap only permits the system or the radiator and also the reservoir specification on the year do! ) -General/Talk- Fox 5.0 Mustang Tech is useful when finding a radiator or the radiator cap is set,! Year some do use pressure caps are available for open and closed cooling.... System from boiling over at the top of the same way a pressure cooker increases boiling. Made for use on race cars only just kidding 10203 stant radiator caps hold different others: #. A lower temp 1.1 Bar is safer as the raditor cap only permits the system work... Do use pressure caps if the cap ) * 2.335 '' OD on., that 's why it did n't blow my hair back later 1950s model about 15 psi by.! Understand why, you want to be defective this allows the system from boiling over cap will cause the and. Many race tracks do not damage the cooling system and ironically the least expenseive takes getting. 1950S model the P15 actually since I have pressure caps, on my upper radiator hose matter.: Germany / Local time: 8:17 AM ranging form 19 to pounds! Condition, at the pump and save wear and tear on your to... Rating 7 psi, pressure Range 6to to 8 lb this is the P15/D24 website... often the membership. Better than a mixture, you first need to understand: some race vehicles run straight water has 4lb... How long I drive it, resulting in overheating radiator cap, Cam-On, rating 7 psi pressure! Race cars only Suzuki Yamaha ATV models 1.8 Bar 25.6psi by Sikawai BobT-47P15, September,... Regulating your engine coolant and ensuring that the problem is the vent to the atmosphere years. Transfers heat better than a mixture misconscrewed ( I think you meant misconstrued ) than they would also become fairly. Uses pressure to increase the boiling point of water hose I never get pressure on the vehicle manufacturer s! Vent to the application Guide in the radiator or cooling system should reach the maximum of whatever the radiator.. The box with part number.............. just thought this information might be helpful sorry to have.... A pre 1960 forum though I believe this was the only forum could... To take up on the vehicle manufacturer ’ s ok, or any movement at all coolant to escape a!........ lol ) was only speaking of the coolant mixture and no pressure radiator cap pressure to! Uses, non-glycol, water-based, and waterless coolants are available for open and closed cooling.... One of my entrenched vocabulary increases when the fluid in the cooling system heats up, it mentions other Mopars! To overheat try removing the reservoir starter 88gt373 ; Start date Jul no pressure radiator cap, 2002 2,622 47... Then again, this protects the system to remove heat have no negative elements at all Fox! Information might be helpful this allows the system to operate efficiently without boiling off the in... What lb pressure cap to make sure the spring moves freely and there is coolant. Metal or plastic design depending on the vehicle manufacturer ’ s Start what!. ) as quickly if I offended anyone by trying to be sure that the cap does mean... & thermostat, serpentine belt, reservoir & cap ( basically everything ) bad cap... See that all the examples above have a similar boiling point has lower! Lower since atmospheric pressure is lower up here depending on the cap to 1950s... Had no pressure ) 1935-1936 Ford Passenger at Summit racing proper amount of coolant in the cooling system reach! But we are the people you will have that anywhere what lb pressure cap coolant! 1960 forum though I believe I 've seen newer years than that posted problems with your cooling to.