Compression Ignition Addict
Join Date: Nov 2010
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Did the swap. It all went smooth. For those interested in how much coolant needs to be drained to JUST change the thermostat, the answer is about 2 gallons (pretty good Zaairman!). Dieselsite recommends to just drain enough that the degas bottle is empty. Well thats pretty close, but if you squeeze the upper radiator hose you can feel if there is coolant still in it(no brainer). I let it out till there was no coolant in the hose then quit draining. Once the hose was off there was alittle in the neck of the thermostat housing so I drained for another maybe 10 seconds (BTW truck was on the level). You can watch the level go down in the neck of the housing. At that point it was just clean the area and swap. Got it put back together and no leaks what so ever, plus didn't even lose a half ounce of coolant. I realize that usually you do a flush or top off with this, but for those that have fresh coolant or ELC and just need to change the thermostat, this is an option! Thanks for all the help! Hope this answers questions similar to the ones I had.
Early 99 F250, Tuned by Gearhead, Diamond Eye 5", DIY intake, GS EGT/Trans/Boost, FRX, HPX, CCV, Schaeffers 9000, ELF7405, Stancor
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