I am about ready to drain and flush my rad.
I know most people say just use water to do so but would it hurt using some sort of rad flush
also when I am going to replace the stuff in my rad I am thinking of going with evans coolant
has anyone had any experience with there cooling products
they are expensive though I think about 25 bucks a gallon

they are listed at www.evanscooling.com

oh yeah is it bad when you take the rad cap off the car and start it and run it at 1000rpmms for it to bubble up just a tad
not loosing any coolant or anything just afraid of my water seals mioght go
heard to many horror stories

 

bump

 

I've owned a zillion cars and I always use a can of commercial radiator flush, followed by a reverse flush using one of those Prestone flush 'n fill kits (and yes, I actually CUT A HEATER HOSE (the shame, the shame!) to install the kit, and NOTHING BAD EVER HAPPENS). The flush helps get rid of scale, rust, miscellaneous crapola, etc.

And I always use the cheapest green antifreeze I can find (the old-fashioned glycol), not any of the extended wear stuff. in my 30-plus years of car ownership, I've never had to replace a radiator. But I think it's important to change the antifreeze regularly to get the crud out, and also to insure it retains its lubricating and anti-corrosion properties.

I bought an '87 GXL earlier this year that had been maintained with regular antifreeze, and the interior of the radiator is so clean that you could eat off it (that is, if you could get the food through the radiator hole).

so I wouldn't buy any expensive coolant for 25 bucks a gallon. There's a product called "water wetter" that is supposed to improve heat transfer if your cooling is marginal, and I've heard it works very well. But in my experience with RX-7s, their cooling is fine (I can't speak for turbo or modified versions, though).