How important is it to run the HOAT equivelant coolant in the cummins engine? I had to make a last minute decision due to availability of coolant. I do intend on switching to a HOAT equivelant coolant in the near future. Is there anything to be worried about?

 

I think the big thing is knowing what you mixed with it. I have always been very paranoid about mixing coolants. HOAT (Hybrid Organic Acid Technology) refers to a specific inhibitor package in the coolant itself. There are alternatives to HOAT. I am running Fleetguard ES Compleat™ OAT.

I see you are in Pflugerville. I am Hutto.

Hello neighbor.

 

Agreed. The MOST important thing is ensure there is no mixing of different types of coolant.

 

Do some searching. Dr. Drizzle has covered this topic in depth of wh you need to use HOAT

 

The guy I talked to at Cummins northeast said that Dodge required HOAT coolant due to the greater use of Aluminum in their vechiles, eg. the cylinder heads on the new hemi. I think so long as you completely flush the old coolant you can run a diesel rate low silicate coolant just fine.

 

A buddy of mine who used to run a radiator shop once told me if he owned it, it would be hoat while under warranty, then flushed and run with tradational chemistry changed every two years...

 

Thanks for all the info...