Thread: D2 V8 Use OAT OT NOT USE OAT?

Originally Posted by It'sNotWorthComplaining!

Bit of confusion about coolants in the D2 V8. Not interested in TD5, just the V8 please
What do you use and have you experienced probs using OAT.
I'm getting conflicting info about oat. The expansion tank on my D2 has a tag H2O + Oat. So I replaced the existing grren cooalnt withOat, now it seems I have a leak from the Radiator. Talking to some one, I was informed that OAT causes electrolysis in the Alloy radiator and eats them away. So I'm wondering if I should replace the coolant with some green coolant? or replace the Rad and refill will Oat and hope it doesn't eat it away again

Hi
We started using Organic Acid Tech coolant many years ago in automotive cooling systems and had major problems due to leaks appearing on hose connections and seepage in gaskets. We ended up recalling all of the vehicals back to flush the cooling systems and refill with conventional non OATS, non phosphate coolant.
My experierence (hundreds of cooling system o/hauls) is if the vehical cooling system is in A1 like new condition stay with (slipery leak finding) OAT but be on the lookout for leaks. Oat will keep the cooling system components looking like new if you can keep it in the system.
I personally use conventional GM or Tectaloy "green" 90+ after completely flushing the cooling system. With regular change outs the alloy corrosion is kept to a minimum but most importantly you reduce the risk of overheating due to OAT leakage. Everthing is a compromise so make a choice: Increased corrosion or a cooling system with lots of little leaks.