Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
When a radiator is designed to run at like 16psi, it has to be manufactured to survive and also tested at higher psi, so a defective cap won't cause the radiator exploded. As the new one is not a big name radiator, I think it's better to verify its quality before installation.Why? The max pressure will be whatever cap you run on it anyway, just do 16psi and call it a day. Don't over think it!
Good info. I think 20 should be a safe number to try on. Also, the pump I'm using is kinds of hard to push once at 20...20 psi for a couple hours should be fine for modern radiators. High quality radiator manufacturers test at ~30psi.
Tried my best to pump to 25 psi and let the whole thing sinking in the pool. Immediately found it leaks from the host clamp. Tight a little bit and no any leak so far. Will let it sit whole night and check how many PSI tomorrow morning.20 psi for a couple hours should be fine for modern radiators. High quality radiator manufacturers test at ~30psi.
May not be able to go that high with my compressor, but will do at least 100 PSI for sure. And I will have to DIY a test kit to do it....try 150 psi. If it doesn't blow, then you should definitely run it. Heck, maybe I'll run it.![]()
I was just kidding. Don't do it.

Just tested the built-in oil cooler today, at 90 psi. Did find a slow leaking from the hose connector fitting nut. Other than keeping tighten the nut, any other way to stop the leak? Also contacting the seller for solution at the mean time.Or try 150 psi. If it doesn't blow, then you should definitely run it. Heck, maybe I'll run it.![]()