Question about 2005 Mercury Grand Marquis
Trying to change coolant on 2005 MGM. Cooling system capacity is 13.6 quarts. Drained system and measured coolant drained. It was 6 quarts. System was full and working fine prior to draining. Heater was on during draining. How do I drain the other half of my coolant? I even ran the engine for a (very) short time after only six quarts of coolant would drain out. That accomplished nothing. I drained the coolant from a single drain point, lower corner of the radiator on driver's side. Coolant ran out freely and was quite clean . .very little debris, etc.. I have since put the six quarts of old coolant back in. The coolant level comes right back up to the line . . up to normal. So when I drain this next time, how do I get the other half of the coolant to drain out?
The engine holds coolant and so does the heater core, the core not much but the engine holds maybe 2 or so gallons, the engine has coolant in the intake ,heads and block. to say you can drain it all complete is impossible, unless you find drain plugs on the side of the engine block and remove them, there is one on each side of the block, if you removed those you would get 90% of the coolant,with also draining the radiator. the only other way would be with a flush machine. i am a tech and the way you said the coolant was clean and you drained all you could then i would say if you keep doing it the way you are you will be fine, i drain mine the same way every year which is to soon for some but not me and i have never had a problem. the only time i drain the blocks at work is when people dont change the coolant for years and it gets rusted, then i remove the plugs. keep doing the flush the way you are and it will be fine, good day. have a good day.
Posted on Feb 14, 2012
Testimonial: "Thank you, Johnny Brown . . very much. I have to confess I did not seek out or look for such plugs. It is because I had been assured they do not exist!! Obviously, now, in light of your post, I will search diligently for those plugs. You can rest assured of that. And, of course you are correct: such plugs would indeed solve my problem . . BIG TIME! Thanks again. Your response was, indeed, very, very, helpful!! I just hope I can locate the plugs. :-) "
The other half of the coolant is "stuck" in the engine. There is no way of getting this out unless you "flush" the cooling system. This is done with a flush machine.
Posted on Feb 14, 2012
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Posted on Jan 02, 2017
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