Some people here will disagree with me. The radiator can probably take a 16 pound cap, Champion sends their radiators out with one, the question might be is whether the heater core is up to the task? Gates 31528 Part Number: 465-31528. Select Store. In-Store. Gates 31528 Gates Radiator Cap Universal. Stant 10229 Radiator Cap, Cam-On, 13 psi, Metal 4.7 out of 5 stars 258. Restore your vintage tractor with new aftermarket parts for many classic tractor brands. Some people think this cap is broken when they first see it because the part that goes into the fill pipe to seal the system “wobbles.” This is a vented coolant cap. Gates Radiator Cap Universal. A 0.9 bar cap is 13.05 psi cap. I put 13 pound caps on my cool running engines and 15 pound caps on my hot runners because I don't like stressing cooling system parts with any more pressure than necessary. Jalopy … Always use a cap of the correct pressure for your cooling system. If there is no pressure in the cooling system, the coolant will boil off. The one that is on there says 15 PSI. Part Number: MRG-2470S 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. Every PSI increases boiling point 3 degrees. In a test run I lost about 1/3 of the coolant, at the time I was using a standard 13PSI radiator cap, I replaced the cap with a 16PSI one, have not lost any coolant but the car still seems to be running a bit on the hot side. Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & more. Not Available. Only 1 left in stock (more on the way). Videos & Articles. 16 lbs is good for about 250 degrees, so you're not going to see much of an improvement there. A 20 lb cap will bring the boiling temperature of your coolant (water) to about 255 degrees. In-Store. $6.99 (1) Ships Today Lowest Price Guarantee. Twist-On Radiator Cap for your 1965-1973 or your 1979-1983 Mustang from CJ Pony Parts today! Truck64, Dec 10, 2016. In-Store. ... Sunday at NHMS we epoxied the radiator back together, put a 16 lb cap on it, and ran cool all day long. Add To Cart. The caps pressure rating varies by engine application anywhere from 13 – 16 psi. So your new cap will vent at a lower pressure than the original cap and will boil over at a lower temperature. Radiator Caps. C B.P. Grainger's got your back. Radiator Cap ; 13 psi (SAE Range 12-16 psi) View Details. 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. GM has changed the part number for the radiator surge tank cap on vehicles that came from the factory with Dex-Cool. There is one coolant cap that is quite different others: Stant #10231. Unlikely but it might do, especially if the radiator is quite old or rusty and it's getting hot in traffic on a hot day. Not Available. 13,16 18 and 20 PSI. Not Available. 1) Radiator cap it a control valve that raises the boiling temperature point of the car cooling liquid keeping the coolant in liquid form under higher operating temperature. 7 lb cap will work just fine. Not Available. The top portion of the radiator cap will list the pressure rating. Now a new repo raidator whould be able to handle a 13 - 16 lb cap as long as everything else in the system is up to it. No old hoses, loose clamps, possibly a bad water pump that you might blow the seal? Therefore, by using a 1.1 bar cap we make the average boiling point of a stock cooling system somewhere closer to around 257-260 degrees. Radiator Cap/Gauge, Thermocap, Aluminum, Silver Anodized, Plain, 13 psi, 30-270 Degrees F, Each. 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