78' F250 Coolant Flush Method?
Moderator & parts slinger
Joined: Feb 2007
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From: S/W Missouri, Polk county
Get a heater line (inline) tap kit and follow the directions, it will flush out the old fluid, but not really flush out the block very well, but should work for you.
http://www.autozone.com/landing/page...flush-and-fill
Flush and Fill Radiator Kit at AutoZone.com - Best Flush and Fill Radiator Kit Products for Cars, Trucks & SUVS
Or http://www.oreillyauto.com/site/c/de...N0185&pt=N0185
http://www.autozone.com/landing/page...flush-and-fill
Flush and Fill Radiator Kit at AutoZone.com - Best Flush and Fill Radiator Kit Products for Cars, Trucks & SUVS
Or http://www.oreillyauto.com/site/c/de...N0185&pt=N0185
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Logistics Pro
Joined: Mar 2001
Posts: 4,157
Likes: 3
Get a heater line (inline) tap kit and follow the directions, it will flush out the old fluid, but not really flush out the block very well, but should work for you.
Flush & Fill In 3 Easy Steps - AutoZone.com
Flush and Fill Radiator Kit at AutoZone.com - Best Flush and Fill Radiator Kit Products for Cars, Trucks & SUVS
Or Prestone AFKIT - Flush & Fill Kit | O'Reilly Auto Parts
Flush & Fill In 3 Easy Steps - AutoZone.com
Flush and Fill Radiator Kit at AutoZone.com - Best Flush and Fill Radiator Kit Products for Cars, Trucks & SUVS
Or Prestone AFKIT - Flush & Fill Kit | O'Reilly Auto Parts
Any specific way to burp the system after?
Laughing Gas
Joined: Nov 2013
Posts: 1,207
Likes: 60
From: S.E. Louisiana;so far USA
The "best" way is to include draining the engine block if someone has installed the drain valves. This becomes more important if a chemical flush is utilized. If you still have the block plugs it will be a significant job to get the valves installed in most cases. Sometime there can be as much coolant in the engine as in the radiator. The in-line approach will work reasonably well if all you are doing is replacing the coolant and don't mind doing it long enough to get the old stuff out. But keep in mind that what is left in the engine will be almost pure tap water so you will have to check the new coolant concentration well. Also some tap waters are not really good for cooling systems. Distilled or perhaps rain water is preferable. Best wishes!
Postmaster
Joined: Nov 2011
Posts: 2,553
Likes: 10
Lots of ways to do this. The heater line method has worked for me. My favorite is to backflush the block through the upper radiator hose. 1 1/4" or 1 1/2" pipe (PVC or iron) will fit the upper rad hose. Remover the radiator hoses, Remove the T stat, install the upper hose to the engine with pipe fittings to adapt a garden hose to the upper radiator hose and turn the water on. Let it run until is is clear. You can do the same with the radiator and heater hoses. When you re-fill, put the correct amount of concentrated anti freeze in first then add water. That way any water left in the block will not reduce protection.
A radiator flush tool like the one linked will save putting together the pipe fittings and also let you blast it with compressed air.
Also note the 400 takes a special thermostat which is usually an order part at NAPA.
http://www.amazon.com/s/?ie=UTF8&key...l_73rgf9bzvw_e
A radiator flush tool like the one linked will save putting together the pipe fittings and also let you blast it with compressed air.
Also note the 400 takes a special thermostat which is usually an order part at NAPA.
http://www.amazon.com/s/?ie=UTF8&key...l_73rgf9bzvw_e
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