Do coolant leak stop products actually work, and which are the best radiator stop leaks you can get in 2026?

Q: Greg, what is the proper procedure to flush and refill my radiator? I want to avoid problems from rust in the cooling system. How often should I flush and refill my radiator? — Aaron, Shamokin, Pa.

Prestone Products Corporation introduced both new and enhanced products at Heavy Duty Aftermarket Week this week in Las Vegas, including a new patent-pending radiator flush that will enter the market ...

Prestone recently introduced a new patent-pending radiator flush that will enter the market as the first of its kind. “Our Prestone Command Heavy Duty 2 in 1 Flush & Degreaser has been engineered with ...

Experts reveal the reasons your radiators aren't working properly ...

Question: I’ve got a 1994 Geo Prizm with about 65,000 miles. It’s only been flushed once, at about 15,000 miles. I was advised not to flush it, as it might cause everything to come loose, and I’d need ...

Your radiator should have a nob that stops the steam from coming through. Some look like a cap with arrows for which directions are on and off, while others might look like a thermostat. Be sure your ...

I have a 1967 Mustang with a 289, stock radiator, and 13lb cap. My car does not overheat when I’m driving around town, but after about 10 minutes of continuous driving my car starts to slowly get ...