DuPont No.7 Fast Flush

[1993GMCSierra]

Went to an auction yesterday, and found a can of this in with all the stuff I bought. People always said this stuff was the absolute best product to use to flush all the junk out of your cooling systems.


Seeing how I plan on changing out both of my radiator hoses in the next few weeks, I might as well flush the cooling system too (it's been nearly 4 years since I last did it). Figured this might be worth a shot to clear any buildup in the system.


Some people have said that the aluminum used in modern engines is what finally killed the Fast Flush......anyone heard similar things? I don't want to try it if the end result will be it eating up my gaskets and radiator.

 

[Enginebuilder]

Sorry, haven't heard of it before. Got any direct links to the product, that would show what chemicals are being used in it?

 

[skylark]

I will tell you this. I used a flush in june and the heater core blew in July. Yesterday the seam at the top of the radiator tank started leaking. Coincidence? Perhaps. You be the judge.

 

[1993GMCSierra]

I'll have to look at the can to see what's in there...I'll post back tomorrow.

skylark, generally, I'm 100% against any type of "flush" except for (if it's really bad) using Cascade in the cooling system to flush. Does a GREAT job.

However, old car guys used to swear by this stuff, and I was just curious. The coolant in my truck is still a nice green color, but I figured it might be worth a shot. I'll do some more research and see.