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Doing a coolant flush on the Hemi. Pulled out a 160 stat. My guess is it is 15 years old. It has USA stamped on it. I am thinking about putting it right back in. I always used Stant Stats with no issues. I have read that they are now Motorad, and junk.

I purchased a Four Seasons heater valve #74643 from Summit racing. Installed it to find that it does not completely stop hot water flow to the heater core. Sent it back, they sent another, and it is the same. In Phoenix we do not need a lot of heat output from the cars heater. These heater...

My 73 has a vacuum check valve in the vacuum line from the engine to the HVAC controller. The check valve is not working. It allows flow in both directions now. The air box was just rebuilt, doors all function properly and quickly. When engine vacuum drops I can hear the air box doors start to...

This one? Or this one?

Not the brand but the type. Our old cars used Ethylene Glycol. There are much better coolants to use today. Watch this video. He is usually correct about most things. I am thinking of switching over to the HOAT coolant. I just did a complete (Hillbilly) super flush of the system. I am good to...

The radiator had a bad leak. No coolant in the car when I got it. Filled with tap water and found the leak, then fixed it. I suspect someone put some stop leak in at some time in the past. The water has been black, stayed black, even after several radiator drains and refills. I finally got the...