Review on 🔧 Efficient Replacement: Stant Engine Coolant Reservoir Cap for Optimal Performance by Deejay Allard

Perfect replacement coolant reservoir caps. I ordered 2 of these, one for my 2003 Suburban and one for my 2004 Silverado. My coolant tank caps were original and difficult to open, and as part of basic maintenance and troubleshooting, it was easy to replace rather than spend time testing. The look and fit are exactly the same as my original caps they replaced. Driven them a few thousand miles, no complaints. I also took the opportunity to modify one of my OEM caps to create a compression tester. I already had a metal schrader valve (tire valve stem) that bolts on and all I had to do was drill a hole in the cap and inside the pressure relief system (I was able to remove most of it) and bolt it in. Place and seal the rest of the lid with epoxy. I can now pressure test my system thoroughly to find leaks (don't go over 15lbs or you could damage the seals, use the lowest pressure required to find a leak). A bicycle hand pump works well for this. I would recommend these caps to anyone who has a GM with a standard coolant tank that they fit.