If you have a radiator pressure tester, then you can inspect the cooling system on your own. A radiator cap is the part of a vehicle responsible for containing engine coolant and ensuring that the cooling system remains under pressure. I love it! Aug 18, 2002 2,622 0 47 Vancouver, WA Visit site. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Fox 5.0 Mustang Tech. The coolant mixture and system pressure combine to set the boiling point. But not all of us see it as a certain year forum. You can post now and register later. If you see this type of symptom, you should replace it immediately. It won’t hurt anything. And over time your fuel costs will also increase. And certain parts will. Rubber seal. Stant offers standard on radiator caps as well as caps for coolant recovery tanks. What an awesome word. VENTED Radiator CAPS. Mustang Forums. 2) White Streaks on Radiator. I’ve read that the 7lb cap could create problems (ie: blow the radiator) if the car had a no pressure cap originally. RADIATOR CAP, NO PRESSURE - Since 1976, Terry's Jaguar has been in the business of supplying a wide range of parts for Jaguars - everything from XK120, XK140, XK150 and all XKE / E-Type Parts models right through to the latest Jaguars on the road. There are one or two ppl that are a bit hard core but you will have that anywhere. Radiator Cap, Cam-On, Rating 7 psi, Pressure Range 6to to 8 lb. Stant pioneered the development of the pressurized ornamental radiator caps with use dating back to the early 1900’s. When the fluid in the cooling system heats up, it expands, causing the pressure to build up. For special uses, non-glycol, water-based, and waterless coolants are available. Sometimes it's hard to find a correct radiator cap. for the word to have just been coined, the internet is very full of the slang applications of the word....as the old saying goes, kicked the slats out of my cradle when I first heard this one... Misconscrewed is my attempt at humor. Moparjack 489 FBBO Gold Member FBBO Gold Member. Radiator cap pressure question. That same mix at 16 pounds per square inch (psi) of pressure boils at approximately 250 degrees. A unique line of high- and low-pressure caps designed for the high performance vehicle. Note: Using a high pressure CAP in normal system and if the temperature ever hits above 140 degC; it would be a problem as the system is operating a over temp and component wear will be critical, the tubes may burst causing a disaster if you are pushing the car hard. Does this mean I'm miscon"screwed"? 18 pounds is the pressure most radiator caps hold. If I recall I believe this was the only forum I could find to cover my 52. This allows the system to operate efficiently without boiling off the coolant and overheating the engine. For the system to work correctly, it must be self contained--sealed because it uses pressure to function properly. 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.   You cannot paste images directly. Avoid pressure above 18 pounds so you do not damage the cooling system by causing a rupture. Read more. However, I think some place in the moderator's description, it mentions other older Mopars as being included. While driving my scanner shows the engine runs at 195 degrees. The radiator cap allows pressure to build up in the cooling system and will eventually vent that pressure to the overflow bottle as the need arises. this is the P15/D24 website...often the main membership still refers to these cars in their posting.. Why is the cooling system under pressure? Misconscrewed. The Function of Radiator Pressure Caps: Most radiator pressure caps keep the system pressure at 16 PSI so the engine coolant can get considerably hotter without the fear that it will boil off. The easiest way to fix this problem is with a new radiator cap. this is the    P15/D24 website...often the main membership still refers to these cars in their posting.. Add to compare list Add to wishlist. We get asked this question daily and it seems most people misunderstand what the pressure cap does. Too much pressure can cause damage, while not enough pressure can cause the engine to overheat. The old Mopars originally had no pressure radiator systems. Les meilleures offres pour Ford d'autres vintage Radiateur pression Cap Part No WT/10C WAXSTAT nos (12) sont sur eBay Comparez les prix et les spécificités des produits neufs et d'occasion Pleins d'articles en livraison gratuite! 4.5 out of 5 stars 68. 7lb pressure. With no radiator pressure, coolant will boil at 224F which is too close to what the engine might see which is why radiator caps pressurize the system.   Pasted as rich text. Without a radiator cap, the liquid overflows. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. If you have an account, sign in now to post with your account. Advertisement. The first radiator pressure tester that should be noted, and the one with the highest reviews, is the FJC 43645 Radiator and Radiator Cap Pressure Test Kit. Hey folks , On my upper radiator hose I never get pressure on it , it’s ok , or not ? The radiator cap controls this expansion and provides constant pressure on the system. Radiator Caps are designed to seal the top of the radiator filler neck to prevent coolant loss, pressurise the cooling system and raise the boiling point of the coolant. David, my thoughts are, the only way that you can lose pressure is that the reservoir cap is faulty or you have a pressure leak somewhere. For correct radiator cap testing a commercial type radiator cap and coolant system tester is required. Radiator Caps are designed to seal the top of the radiator filler neck to prevent coolant loss, pressurise the cooling system and raise the boiling point of the coolant. Just wanted to make sure ppl know some cars do have pressure caps. My only old car is the 47 Plymouth convertible. High-performance caps range from 19 – 32 psi. Which is great, as I think they are much the same animal in their overall makeup. Seller assumes all responsibility for this listing. Rubber upper and lower seals. Thread starter 88gt373; Start date Jul 18, 2011; Forums. However, you want to be sure that the problem is the cap, and not in another part of the system. System but I AM not sure what lb pressure cap to 15.... Issue does n't have to be used, both hoses, water pump & thermostat, serpentine,... At 1 ATM of pressure $ 99 at Summit racing paste as text. Amount of coolant in the header tank ensures that this pressure varies between,... 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