I looked on rockauto.Com. and they list the plain cap and one with a lever to release the pressure. They both regulate cooling system pressure . And the overflow hose either goes to a overflow tank or dumps overflow onto the ground. I think most cars came with overflow tanks after 1970.Does anyone have a part number for a radiator cap that doesn’t work with a overflow system per 73?
Ok. So maybe early 73 year cars didn't have a overflow tank? And later production did have ?I have a 71 roadrunner. 1973 was the first year of the overflow tank for Chrysler and each system had its own style radiator cap per the 1973 service manual. It also says in the manual do not use a standard cap on a recovery style system.
Do it matter what size that recovery tank is? All I have is a 14oz canThe whole point of a recovery system is so that there is never an air pocket in the cooling system. If you fil a non recovery systems radiator to the top when it is cold, it will dump the excess coolant when it gets hot. The coolant level will always be below full when cold when you open the cap to check your level. Unless it is an oe type restoration, add a recovery system. ALL cars made in the last 40 plus years have them for a reason. The coolant is always full, runs cooler, less air, less corrosion. 16 lb cap. Always pressure check the cap. New doesn't mean it works.
Overflow bottles were used before 1973. My 72 RR/GTX has one and it's a factory piece...I have a 71 roadrunner. 1973 was the first year of the overflow tank for Chrysler and each system had its own style radiator cap per the 1973 service manual. It also says in the manual do not use a standard cap on a recovery style system.