Question about 1984 Ford Econoline

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What kind of diesel engine in a 1984 Ford Econoline Class C RV? Are these engines known for head gasket problems and should a rebuild have fixed that?

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What you have is a Navistar 6.9L Diesel engine in your van-RV.
They are know to blow head gaskets----nomally its a matter of taking the heads off --clean everthing --check for unusual large crack in the glow plugs pre-cups, check heads for flatness and than slap the heads back with new head gaskets.
This engines if the normal maintenance was done regularily they will do a easy 300,000 miles--with the head gaskets replaced when needed.
the easiest way to check for this is look for bubbles in the coolant resorvoir bottle with the engine running.
Also the other most important thing is make sure that the cooling system is clean--means new coolant on schedule and radiator removed and have it rodded --cleaned out.
You can tell if it needs rodding by draining a little coolant -enough that you can see the tube ends thru the radiator cap neck --to see if they are plugged or open.

Posted on Nov 20, 2009


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