ACDelco GM Original Equipment RC87 18 P.S.I. Radiator Surge Tank Cap
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Once I had driven around for 30 minutes, parked the car, and turned on the heater on maximum, the problem was never again experienced. A radiator cap is an essential part of the cooling system.
Earlier this year I purchased a coolant reservoir that had a cap attached to it. When I stopped to get gas after driving 250 miles, my coolant boiled over the cap. It looked like it was going to last, but it failed. While it was hot, I tried to tighten it and it literally came off, leaving no coolant behind. A search on the Internet led me to this article. My first impression was that it wouldn't make a difference at all, but when it arrived I realized it was better than Compare it with this one and you'll see where the old one is cheap plastic. This is likely due to the heat expanding the plastic and allowing the coolant to leak out. That's not what I see this cap doing. Having this handy product will help you not be left stranded when you are In this photo, you can see a cap that is completely Hold them both in your hands and you will be able to tell the difference in quality. *Edited The year is 2020 now, and there have been two leaks from the bottom and the fittings since then. It is a limited lifetime warranty reservoir that was purchased from a local auto parts store. My OEM reservoir from Amazon is supposed to last longer than replacing it every 2 years. I've finally decided to stop changing it every 2 years. The bottom line is that I still use the cap that has gone through 3 reservoirs already. It is unlikely that I will replace this cap in the near future (Saturn SL2 with 300k miles still.
In accordance with the description. This replacement expansion tank fits snugly on Saturn S Series cars with Dorman oil tanks. These are designed to hold 18 psi, up from 15 psi in the OEM. The acceptable pressure rating might have changed for some reason The valve is still rated at 15 psi, though I don't know if it has a bigger pressure relief system.
The plastic interior of my original cap was cracked & fell apart because it was so old. It is fragile. The label said 15 pounds per square inch. I'm not sure if that matters. Since it says 16 psi in the description, a difference of 1 psi shouldn't have any significance. On top of that, the actual cap reads 18psi. My eyes just popped open and I see they added 18 psi to the picture. During extreme boil overs, the cap is designed to release coolant. The device will be able to withstand higher temperatures, I assume.
In the GM bulletin, it is recommended you change your coolant cap on your C5 Corvette to 18 pounds per square inch. I appreciate the well-constructed and well-fitting nature of this cap.
In the beginning, there were 15 pounds. The cap appeared to be in good condition, but I encountered a very slow loss of pressure with a pressure tester when pumped up to 15 pounds. The summer is just around the corner, so this is a bad sign. 18 pounds of weight was held in this replacement. During the 4 hour pause, there wasn't a loss of data.
In spite of the 18 psi rating on this cap, as opposed to the 15 psi rating on my original factory cap, this one still worked flawlessly.
At this point, it's impossible to say exactly how well this is functioning since I always lose coolant The protocol will be updated if I discover the cap is no longer being used. It may be but if it isn't. The review will be downgraded as soon as possible.
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