I have green antifreeze in my coolant system. I need to change my DCCV. Should I get the system flushed and have the proper antifreeze installed?

Can I do a full flush of the system without the worry of still having both coolants in the system?

Can I leave the green in the system, will it cause an issue?

I'm in Atlanta, Georgia USA, and it is getting pretty hot, so I'm in need of doing this soon. I'm not going to replace until I know about which coolant is going in.

Thanks in advance.

 

While some coolants are supposedly compatible with most specifications regardless of color, I would not take any chances. I would get all traces of your current coolant out of the system and replace it with Dexcool, which meets the required M97B44D specs for these cars....

 

What is the best way for me to flush the system? Do I need to use distilled to flush or can I flush with tap water and a chemical? Will one flush work?

I might just send it to a shop (Jaguar specialist) or the dealership.

 

If your DCCV is not working, I'd recommend unplugging it in hopes of saving the climate control module. Jon is correct in all 3 points above: 1) Some coolants allegedly can mix with any others without causing this: https://www.jaguarforums.com/forum/s...talled-180124/
2) Since you don't know what you've got you need flush it all out
3) The spec stuff is always the safe bet
*However* I have flushed everything (active) in my signature list with distilled water and commonized on Zerex G-05 with no problems associated from either S-Type.

 

My DCCV stopped working in December. If it fried the CCM, I've gone to a junk yard and have another one. I checked it before I bought it.

 

About 12 gal of distilled water should set you right unless you find evidence of gel/gunk due to coolant mixing. Then you may need to use a flush chemical.

Drain the radiator at the draincock. Refill with distilled water. (probably 2 or 2.5 gal)
Run it up to operating temp. Shutdown and drain. Rinse and repeat until what you are draining out looks very nearly like the distilled you are putting in.
Drain one last time and top up with your chosen coolant. You need to use full-strength, not 50/50 pre-mix as you already have the system about half-full of distilled water.

 

No need to use distilled water if it's just for flushing. Save it for mixing with coolant.

 

Is it possible to do a reverse flush?

 

Probably, but unnecessary.

 

Thanks to everyone.

 

With all due respect to Mikey, @88 cents/gal I wouldn't "save" the distilled. Even if you do, you'll want to flush the tap water from the system......which will take about 12 gal of distilled, but you'll have lost "color" as a differentiator. Even if you want greater purity, it isn't that expensive if you double the distilled.

 

If all the drains are opened, how much coolant remains trapped?

 

Well....If you insist on doing it RIGHT......
I don't know, Mikey, supposedly not much. I've never had any luck finding the engine block drains on either my X300's nor the X202's despite sevice documentation in-hand telling me where they are supposed to be; let alone access to actuate them!

But a good point, draining only through the radiator, you will ALWAYS have some small amount of "old" in the system, however dilute. Even with the block drains open I imagine the heater core will hold a slug of old.

*Full disclosure, I am on a well with 45 gr hardness. Consequently, everything runs through a softener, though I do have one un-softened tap available (potentially for a future sprinkler sys installation) but even the softened water is highly corrosive. So I have an incentive not to introduce my tap water into the cooling system.

 

I went to a well respected radiator shop that I've used, and they state that it is a universal gold antifreeze. I do not have to drain the fluid from his recommendation.

I originally asked how much it would cost for him to drain and refill the system. That was when he stated that it wasn't necessary.

Now I just need to replace the DCCV and CCM for A/C and top off and bleed system. GREAT!

 

So your green antifreeze is "Universal Gold?"

While that may be, your car left the factory with anti-freeze best described as "Pink" and equivalent to the Dexcool as described by Jon89.

X200's (Pre 2003 Facelift) originated with a gold-colored coolant equivalent to Zerex G-05.

 

If your "universal" coolant does not meet the required specs as published above, you'd better get it out of your system and replace it with coolant that does....

 

Colour of the coolant is not a reliable indicator in any case.