2008 Grand Marquis Coolant Replacement Procedure - Page 2 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #11 of 14 (permalink) Old 03-20-19, 07:54 AM
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Re: 2008 Grand Marquis Coolant Replacement Procedure

Absolutely! And don't forget to get a new "O" ring with the thermostat. My parts guy always has to remind me.

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post #12 of 14 (permalink) Old 07-30-19, 04:52 PM
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Re: 2008 Grand Marquis Coolant Replacement Procedure

I don't get the joke. If he has a bunch of water left in the block and mixes it with 50-50 then he won't have anywhere near the desired 50-50 concentration. But I don't remember (if I ever did know) how much water is left after the radiator is drained and the system is flushed until clear.

edit; I just checked the Ford C/D and it states that "less than 80%" of the coolant can be removed with the engine installed. That means that 20+% will mix with the 50-50 and he will not have sufficient protection and lubrication.

By the way, the Ford Service C/D from 2001 does not specify distilled water, only "clean, drinkable"" water. I've never personally used distilled water in the 50 years I've been servicing my own vehicles and I never saw any problem what-so-ever.
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post #13 of 14 (permalink) Old 07-30-19, 11:51 PM
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Re: 2008 Grand Marquis Coolant Replacement Procedure

There are coolant testers to use as a guide to get close to 50/50. And depending on your location that ratio can move.


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post #14 of 14 (permalink) Old 07-31-19, 02:25 AM
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Re: 2008 Grand Marquis Coolant Replacement Procedure

In the dark ages when I first entered the motor trade we had a workshop wall chart from antifreeze manufacturers that listed all the cars , cooling capacities , how much was needed to be added to give 25% /33%/ 50% . Simple case of flushing , filling with required amount and topping up .I also remember most cars then had a block drain tap ( later years replaced with a plug ) which was handy . Our water is so pure we never have to use distilled water but 200miles south in England the water is so hard it's advisable due to calcium deposits--lime scale and furring. Nowadays quality antifreeze has a 10 yr lifespan . Changed days as it was a good earner for us when winter approached . As suggested , if in doubt and concerned , get a antifreeze tester . Simple to use , cheap and handy to check any cooling systems that may need topping up .
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