So we … At first I thought it is just "overflow" or seeking its own level, but after driving for 100 miles it was still doing it. High-performance engines also create more heat. As we tried to formulate a short answer for this question, we were reminded of how complicated the topic really is. If you have an older vehicle and replace the radiator, … What happens if a knock sensor is installed upside down. The cooling device is decrease than rigidity. I have noticed that when temps get above 70 degrees my overflow bottle will fill pretty quick, but if I let it idle for 30 seconds the overflow bottle empties quickly. We have now increased the boiling point to 257 instead of 212 degrees and we can cook much faster. Always use a cap of the correct pressure for your cooling system. So I woudn't positioned plenty into using a greater robust rigidity cap. that is ok to apply it, regardless of the undeniable fact that it would possibly no longer make any distinction in a decrease rigidity cap it somewhat is stable and dealing. The ones at all the parts stores around here seem to be 20lbs of pressure and oem cap is 16lbs...would the parts store ones be fine? What pressure cap do you guys have?, what is the stock cap rated at? The top portion of the radiator cap will list the pressure rating. User Info . When the fluid pressure inside the radiator exceeds 15 psi, it forces the valve open, allowing heat to escape and excess coolant fluid to overflow into the tanks on either side of the radiator. It is designed to hold the coolant in the radiator under a predetermined amount of pressure. The radiator cap is designed to seal the cooling system to prevent coolant loss, maintain pressure within the cooling system and raise the boiling point of the coolant. The stock indicated pressure should always be used. Questions of a Do It Yourself nature should be a higher pressure cap won't fix it your going to need new head gaskets, you could go higher but that will void any warranty that there might be. and that's extraordinarily damn stable!! If you think your radiator is getting alittle weak you may want to go with less pressure. It might simply be that the cap is no longer holding the pressure correctly. If you do not have the equipment to do the radiator cap pressure testing, you can have it done at a shop. All modern automotive cooling systems are under pressure, completely regulated by the radiator cap. The easiest way to fix this problem is with a new radiator cap. If you do not have the equipment to do the radiator cap pressure testing, you can have it done at a shop. When it comes to coolant caps, there is a surprisingly wide array of radiator caps. Click here to look at my sold 66 Chevy II Sedan. Can anyone suggest a radiator cap psi for my condition? High pressure caps are available for open and closed cooling systems. submitted to our "DoItYourself.com Community Forums". 09-10-04 04:40 PM - Post# 511188 In response to Black57 I ran 7bl caps on all my '57s. stick with recommended cap. Let's heat it with a pot of water. Now you can guess the rest! Get your answers by asking now. My caravan overheats and when it does it won't produce heat. If you have recently bought a used vehicle, the … How is an EFI to Carburetor generally conversion done? The boiling point of the water increases three degrees for every 1 psi the pressure goes up. that is an exceedingly minor attention. A system with 15 psi cap will add 45 degrees for a final boiling point of … There is one coolant cap that is quite different others: Stant #10231. You can find the rating in your owner's manual, or by contacting the manufacturer. The previous owner may not have thought to check the cap, or they may not have cared if they have the correct radiator cap for the vehicle. Terrible grinding when braking after brake job? I don't think it would hurt your car. Email Report rj_ly Honored Member Posts: 17575 Loc: Southwestern OH Reg: 11-15-02. Too much pressure can cause damage, while not enough pressure can cause the engine to overheat. The water is heated to boiling 212 degrees. This protects the system from boiling over at the top of the operating temperature range. Why are most auto shops open Monday through Friday from 8-5? Other types are held on but not locked on, with an ear that can let the pressure release. Ive got an aluminum BeCool Radiator in a 72 Nova...The recommended pressure cap to use is between 12-13 psi radiator cap....What would happen if I put a higher pressure cap on the radiator like 17 psi...Would it cause any engine damage or anything, You can find new pressure caps for your radiator in the local auto supply store. Discussion Starter • #1 • May 4, 2017. If we increase the pressure from 12 to 17 psi that is 40% the temperature also would have to go up by same % . If there is no pressure in the cooling system, the coolant will boil off. So the real question is what should the radiator be able to safely handle??? To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Most people work those hours. Mar 21, 2019. I got the FlowKooler pump, will replace thermostat, and all hoses. The top cover pressure level is independent of the engine coolant temperature and does not cause the engine to run cooler. i have a dumb question: me and my tech had a big discussion about vented vs non vented radiator caps. However, you want to be sure that the problem is the cap, and not in another part of the system. If you are going to play around with cap pressure, the goal is to get enough pressure to not boil over, while having low enough pressure to prevent the hoses from blowing off. Avoid pressure above 18 pounds so you do not damage the cooling system by causing a rupture. Why does my 2005 Jeep Grand Cherokee keep needing to be jumped? But, if that one thing is not properly maintained, you can have thousands of dollars in repairs to keep up with later. All information is provided "AS IS." How much does the pressure raise the boiling point? If you have recently bought a used vehicle, the radiator cap is something that you will want to check. If you are unsure of the pressure rating for your radiator, check with the manufacturer for the maximum recommended operating pressure." if this is the case its not your cap you have a blown head gasket and its leaking compresion into your coolant system and thats why your looseing all your coolant. All rights reserved. It simply raises the boiling point of the water or coolant. Ive got an aluminum BeCool Radiator in a 72 Nova...The recommended pressure cap to use is between 12-13 psi radiator cap....What would happen if I put a higher pressure cap on the radiator like 17 psi...Would it cause any engine damage or anything. Prevention is best. Even with a cap that is properly rated, it may be necessary to do a physical radiator cap pressure check to determine the maximum pressure that the cap will hold. A 10 lb cap wont let it boil untill 242F. A coolant mixture of 50% water and 50% ethylene glycol has a boiling point of 223 degrees. The cap that is on there is a 4 lbs cap. The cap acts as a pressure relief valve. The top portion of the radiator cap will list the pressure rating. Higher pressure caps can boost the boiling point even more. i asome your trying to put a higher pressure cap on because it keeps popping off and blowing all your coolant out. How Radiator Cap Pressure Affects Cooling. my advice if you want to go higher on the cap pressure go only 2 lbs higher. I used to have overheating issues wth my beat up 1991 Geo Prizm with over 245K miles on it. High pressure caps are made for use on race cars only. A pressure cap or non pressure cap … 2) If I increase the pressure on my cap, will it cool better? My 2010 Jeep calls for 35... Whats the best way to remove air from furnace. 1995-2018 MH Sub I, LLC dba Internet Brands. A pressure cap used in a system designed for pressure does nothing to reduce engine temperature. I will try a higher pressure cap and see what happens. Been in the process of replacing the water pump on my '91 with 2.5. Well, it's about 2-3 degrees for every psi that we increase the pressure of the system. Along with the radiator cap the hoses, clamps, thermostat, gaskets and water pump are just also important. How to Remove a Radiator Cap without Dam... How to Remove a Radiator Cap without Damaging Your Vehicle. Tip: The radiator cap should be able to hold most of the max pressure for up to five minutes. If a decrease rigidity cap isn't working, then a greater robust rigidity cap mght. The cap raises the boiling point. You don’t need to wait five minutes, though. Why are you putting a higher pressure one on tho? A high-pressure radiator cap is used to raise the boiling point. We welcome your comments and Different radiator caps have different ratings, and it is important that you always use the correct cap for your radiator. Extreme high output engines may benefit from higher pressures. The radiator cap acts as a release valve set to open at the maximum pressure point. The radiator cap is more than a cap for your radiator; it keeps your engine cool by sealing and pressurizing the coolant inside it. If I read this correctly, cap pressure directly effects coolant temp. If it was not kept under pressure, it would begin to boil, and soon all the coolant would have boiled away. Check the pressure on the cap with a radiator cap pressure tester. Thanks! In most older vehicles, this will be a 16 psi cap (Flex-a-lite PN 32101), while new vehicles usually use a 20-or-higher psi cap. 13 on mine Mar 9, 2005 at 10:29 AM … Copyright© the only concern you pick is a robust working radiator cap. I noticed today when i shut car off after d... understanding manometer maximum pressure spec. Step 5. Read this correctly, cap pressure go only 2 lbs higher ever there 's a leak rigidity... Slow loss is … the top portion of the upper limit of what pressure radiator cap should i use?. 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