C-series coolant system maintenance item

[1969Roamer46]

While replacing the thermostats on one of my 1996 6CTAs, I decided to pull the hoses that attach to the top of the expansion tank. They connect to the top of the turbo, the exhaust manifold, and two points near the top of the engine. I believe these lines allow air to burp out of the system. Good thing I pulled them, because two of the four fittings were 100% plugged with rust. An 1/8″ drill cleared the blockages. I blew all of the hoses and cleared fittings out with air, then reassembled the fittings. If you have similar hoses on your engines, might want to pull them and check that they’re clear next time you service the cooling system.

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[Tony Athens]

Thanks for this post.. Yes, I have seen this many times  , what I call “spitters” that vent air ( actually built up molecules of combustion gases/particles/rust)  from the coolant system to the expansion tank over time.. It’s from a basic lack for following coolant maintenance  every few years.. Glad you went  to the trouble to sort it out.

 

 

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