Quote Originally Posted by baludoy View Post
do coolants expire?

i was about to top up my truck's rad reservoir when i noticed that the coolant stored in its original bottle isn't as "watery" as i remember it to be. parang medyo viscous na siya w/ crystal like "impurities".

btw, i'm talking about the oem mitsubishi green coolant. siguro may mga 4 years na din siya naka tago sa cabinet.
i would be wary of these if there are "solids" present.
the solids might not dissolve, and cause blockade.