Enhance Performance with ACDelco GM Original Equipment RC87 18 P.S.I. Radiator Surge Tank Cap Review

As advertised. Fits snugly on Dorman reservoirs for Saturn S-Series vehicles. OEMs were rated at 15psi, these were rated at 18psi. I'm not sure why the allowable pressure rating has changed, although I don't know that it's still not a 15psi safety valve.

I bought this because my replacement tank had a bad cap. This one started much better but didn't last. It broke after a little over 4 months. Found a coolant leak underneath. I've tried re-tightening the cap but it won't tighten and is therefore useless.

Can't believe the radiator cap fixed the overheating in my daughter's '97 Saturn SL2! I put in a new radiator, hoses, coolant temp sensor and thermostat, checked the fuses and relay and it's still overheating leaving me with only one option: get an updated radiator cap instead of 18 pounds of pressure. conventional 16 pound pressure. I drove the car, parked it and turned on the heater for a maximum of 30 minutes and the problem never came back. Lesson learned about the importance of the…

This is the only cap you need. I recently bought a coolant reservoir and it came with a cap. The lid looked like it would hold. I did 250 miles in one trip and when I stopped to fill up my coolant boiled off through the cap. Tried to put it on hot and it literally came off and drained all my coolant. I searched the net and found this. Didn't think it would make a difference but when it arrived you could tell it's a lot better than the other. Old plastic is cheap in comparison. I believe the…