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OK everyone is going to give me crap about hitting 90K miles and not changing the coolant. I get that, but part of my thinking, right or wrong has been "if it isn't leaking its OK" - That said I'm beginning to wonder when I might experience a hose failure or something else (pump, radiator, heater core) So what's your thoughts? Do I keep running until something pops a leak? Do I change out the coolant with new and will that upset the status-quo? When have your hoses failed - should I change coolant and all hoses. What's your thinking on all of this? Thanks in advance.:smile:
 

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2006 Ridgeline RTS in Steel Blue
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Since this is posted in the G1 section I'm going to guess but unsure of YMM since your profile is incomplete...

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About 1.5 gal come out with a drain and fill, a little more will come out with a timing belt/water pump change, which is due at or near 105k miles

YMMV :nerd:

EDIT: Honda is estimating a timing belt at 7yrs (15k per year) after the initial DnF of coolant it's supposed to be every 60k, I believe Code 5 will pop at 120k and then every 60k IIRC
 

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2010 RT - Bali Blue
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My timing belt was done around 150K (I think) and the water pump + tensioner was changed along with it. Last year, during the summer, I changed the radiator, thermostat, upper and lower radiator hoses. Honestly, the radiator hoses were perfectly fine, I changed it because I was headed to FL from NJ. The thermostat and hoses were just a precautionary need to change while i changed the coolant. The radiator was showing some signs of abuse from road debris and could see metal corrosion by the bottom end-tank.
 

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Coolant additives decompose overtime from time and repeated temperature changes. These additives prevent corrosion and generally keep your cooling system in order. I don't doubt the ethylene glycol decomposes as well. Type 2 coolant, Honda's, is good for a long time, so 90k is far, but not stretching it by any means. Personally I'd do every 60, but you're probably good until your timing belt is due.
 
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