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Not from the factory on these, there are provisions, places to connect them. The early C series didn't need them. Mid stop liners, spun steel and not cast iron. Later in life, they had them from the factory due to changes in the way the stuff moved around and how the engine fired. However...

There are provisions on the C for corrosion inhibitor installations. Two spots. The exhaust side has 2, soft plugs, these go into the lower and upper coolant cavities. Lower is high pressure, high is low pressure and rear of the block, same configuration. Cummins sells the fittings that go into...

You should also replace #26, the seal. If it is compromised you will have slow warm up and low running temps. It basically bypasses the stat if it is junk. And, with an auto trans, that could be a bad thing because there should be a diverter plug installed so that when the stat is closed, there...

Brands/types. If you got at NAPA, get them from NAPA

It is wise to get test strips and check concentration. Over charging causes issues just like non low silicate. Too much SCA will cause w/p seals to leak and coat liners with a thick coating that takes heat transfer away from the liner. Make sure the strips are compatable with the coolant you are...

Nope on the pink. Fleetguard sca was blue. Another "opinion". Look into Fleetguard antifreeze, the blue stuff. It is conventional but will mix with ELC types. And, yes, STAY AWAY from the red, orange extended life stuff, old engines have pieces internally that the ELC will attack and you end up...