Honda Odyssey Forum banner
Cancel
Create thread New Garage Forums

Coolant flush?? Back seat heater?

Jump to Latest
1 - 19 of 19 Posts
J

jpritch2

· Registered
Joined
·
40 Posts
Discussion starter · #1 ·
Just got my daughter a 2006 odyssey and am flushing the coolant as it is obviously not honda coolant.

Anyway, a sticker on by the engine says to use caution due to the fact that there is a back seat heater system (not sure of exact wording) and to follow the manual.

I can find anything about this.

Can someone post a link for flushing coolant on a 2006 Honda odyssey.

I have flushed dozens of vehicle and have never seen this warning sticker.

weird.

thanks,
jp
 
#3 ·
Yep, that's it.

The caution label is maybe a little strong. Even with the rear heater, the bleeding procedure is similar to vehicles with only a front heater.

Not sure if this is in the thread you linked, but I jacked up the front of mine to help air escape when I bled the system. Went like clockwork.

Dave
 
  • Like
Reactions: echos_myron
Save
Reply Quote Like Like
#4 ·
I've done the procedure from the manual a couple of times now with the car level on the ground and had no issue, too.

The biggie on the coolant is not having "mixed" coolant. I've been told you can run whatever coolant you want but you don't want it to be mixed. I prefer to have the original blue coolant, though.
 
Save
Reply Quote Like Like
Discussion starter · #5 ·
davedrivesody said:
Yep, that's it.

The caution label is maybe a little strong. Even with the rear heater, the bleeding procedure is similar to vehicles with only a front heater.

Not sure if this is in the thread you linked, but I jacked up the front of mine to help air escape when I bled the system. Went like clockwork.

Dave
Click to expand...
Thanks Dave! Good to know.

jp
 
Discussion starter · #6 ·
John Clark said:
I've done the procedure from the manual a couple of times now with the car level on the ground and had no issue, too.

The biggie on the coolant is not having "mixed" coolant. I've been told you can run whatever coolant you want but you don't want it to be mixed. I prefer to have the original blue coolant, though.
Click to expand...
thank you!
jp
 
#7 ·
John Clark said:
The biggie on the coolant is not having "mixed" coolant. I've been told you can run whatever coolant you want but you don't want it to be mixed. I prefer to have the original blue coolant, though.
Click to expand...
Same here.

The coolant cannot be fully drained because of the rear heater (and probably the air box heater to a lesser degree). Therefore, stick with the factory coolant to avoid mixing problems.

Dave
 
Save
Reply Quote Like Like
Discussion starter · #8 ·
davedrivesody said:
Same here.

The coolant cannot be fully drained because of the rear heater (and probably the air box heater to a lesser degree). Therefore, stick with the factory coolant to avoid mixing problems.

Dave
Click to expand...
problem is , i bought this van used and it has green coolant , and I believe the honda coolant is blue?

dm
 
#9 ·
Ah right, got it.

Yeah, the Honda coolant is blue alright.

Wonder if you could disconnect the hoses under the hood to the rear heater and blow air through one to force the old coolant out the other?

Dave
 
Save
Reply Quote Like Like
#13 ·
+1

Just thinking back to the rear heater warning label you mentioned, the garden hose flush fitting would deserve mention as a don't-do on that label.

Dave
 
Save
Reply Quote Like Like
#14 ·
I just bought some Honda blue coolant to top off my overflow reservoir as I noticed it looked nearly empty. I opened the radiator cap to check the level there and noticed that the coolant is bright green. According to the service records of the previous owner, it would appear that this green coolant was put in by the Honda dealership is was serviced at.

Anyways, I'm looking at a complete drain and fill and am thinking of:
1) draining both the block and radiator
2) top off with distilled water
3) running the engine to cycle and dilute remaining coolant
4) repeat 1-3 as needed
5) filling with Honda blue

Any tips, tricks, suggestions?
Edit: 2005 EX-L, so it has the rear heater core too.
 
#15 ·
I wouldn't fill with water. I'd just drain everything as best you can and then refill with Honda blue coolant. Or you can just leave it. If you add plain water you will end up with a bit of extra water in the system and be less than 50/50 mix. How much less will be unknown.
 
#16 ·
Yeah, Honda coolant is premixed with water. No guessing is required to get a 50/50 mix.

Dave
 
Save
Reply Quote Like Like
#17 ·
Coolant color is pretty meaningless at this point. Any OAT coolant will work for this application. The old school coolants are still silicates, but all of the new long life coolants are OAT or HOAT. Anything that is labeled long life universal will work such as prestone extended life, peak long life, peak global lifetime... - But you can't rely on the color.
 
#18 ·
Is there a way to test the coolant to know for sure if it is a long life coolant or not. Currently I don't know if the green is old school coolant or not, and my concern is adding a coolant that is not compatible which may cause problems. As John suggested, I could safely add a bit of water to bring the level up without any serious risk, but I can only do that so much before I lose protection. Otherwise at some point I'll have to change out the fluid and start fresh.
 
#19 ·
cahaak said:
Coolant color is pretty meaningless at this point. Any OAT coolant will work for this application. The old school coolants are still silicates, but all of the new long life coolants are OAT or HOAT. Anything that is labeled long life universal will work such as prestone extended life, peak long life, peak global lifetime... - But you can't rely on the color.
Click to expand...
That is not a true statement. Several manufacturers are still using glycol-based coolants which are not OAT or HOAT (mostly European).
 
Save
Reply Quote Like Like
1 - 19 of 19 Posts
About this Discussion
18 Replies
6 Participants
Last post:
redmondjp
Honda Odyssey Forum
posts
1.1M
members
432K
Since
2000
Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more.
Full Forum Listing
Explore Our Forums
2005 - 2010 Odyssey 2011 - 2017 Odyssey 1999 - 2004 Odyssey 2018+ Odyssey Problems and Concerns