Sign in to follow this  
Followers 0
djpauls

Coolant/Antifreeze Change?

2 posts in this topic

2001 Dynasty with Cummuns 350 ISC. Cooling system flushed and Extended Life OAT based coolant installed November of 2010. Coolant filter replaced with SCA dispensing filter October of 2011. Radiator replaced and 5 gallons of non-OAT based coolant used to top off system February of 2012. Cummins dealer added additional SCAs when serviced September of 2012. I realize that there are all sorts of things wrong with this picture but my question is when should I again flush and fill the system and should I continue to monitor for SCAs?

Share this post


Link to post
Share on other sites

Flush and fill with one or the other-- the two chemistries are different. I favor the new OAT-based coolants, as they have twice the life and do not require testing and adding SCA's.

Remember, on a linered engine like your Cummins C, the proper coolant chemistry is REQUIRED to keep cylinder walls from eroding.

BTW, if you go with an OAT-based coolant, the filter you use is a "blank". A blank has zero units SCA, but is a filter.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0