coolant age/viability

[FF]

"As it turns out they test for freezing point, molybdate and nitrite."


Useful test strips for a modern engine that needs SCA,

but does it test acid level in old antifreeze for our antiques that don't need SCA?

 

[sunchaser]

A few decades ago on larger diesels coolant filtering systems came into play. When combined with on-site coolant testing analysis coolant exchanges were extended.

The filters cleaned the residual engine block grit and rust particles that had proven to cause inordinate wear to the coolant system pump shafts and seals. Strips only tell a part of the puzzle when deciding to change out coolant. Suspended solids, increased viscosity and heat exchanger sludge build up are other reasons that a time or hour liquid changeout should be considered. Especially if noted in the book maintenance.