Engine Coolant Color Change
I had my original coolant drained, system flushed and refilled with Fleetguard ES Compleat OAT coolant. This was done at my local Cummins Coach Care center. I've had work done there and have no iss...
Forum Discussion
OK, I had a long discussion with one of Fleetguard's Filtration tech folks this afternoon. He advised this was not an uncommon call for them in recent months due to some weak/bad dye they received. He advised if I got one of the batches of OAT with the dye problem, the coolant will change to a yellow or amber color. This can occur quickly or over a longer period. He said this affected coolant color only and had no impact on the chemical makeup or the effectiveness of the coolant. He assured me if the coolant was tested with their OAT test strips (they were, I witnessed that) and tested well, I had absolutely no issue. He advised me to test again in 6 months.
