A rusty color indicates that the rust inhibitor in the coolant has broken down and it can no longer control rust and scale buildup. The system must be cleaned/flushed and a fresh 50/50 mix of ...

Topping up engine coolant is an important part of maintaining your car, ... uses Organic Acids as the inhibitor. It's orange in color and is typically found in GM, Saab, and Volkswagen vehicles.

Remove the radiator or coolant reservoir cap and examine the coolant color. If it looks rusty (don’t confuse orange coolant with rust), has crud or oil floating on the top, or looks like ...

This article discusses the determination of nitrite levels in engine coolant by using UV/Vis spectroscopy. ... EPA 354.1 reports nitrites as mg/L NO 2 - N (Nitrite - Nitrogen) over a calibration range ...

QUESTION: I have a '97 Chevy pickup with a 5.7-liter engine and less than 97,000 miles. The garage replaced the red coolant with the green antifreeze. The manual says to use red. The garage said ...