Engine coolant replacement (radiator fluid replacement) in Honda Accord 2013 - 2017 and older models is a simple drain & fill that can be easily done in just a few minutes. The coolant changing interval varies by vehicle: 60K - 100K miles. I changed mine at 6 years 90K miles and just before summer.

At a Honda dealer the engine coolant replacement cost is $150 approx but at home the coolant change cost is about $30 or less because we only need the fluid.

PARTS & SUPPLIES:
* Honda Type 2 Coolant, 2 gallons
Part # OL999-9011, https://amzn.to/2XuGvEh

* Oil drain pan, https://amzn.to/33qaQYn

* Basic Funnel, https://amzn.to/2EY1Pfo
or use coolant funnel, https://amzn.to/3cThklq


 STEP-BY-STEP PROCESS:
1- Be sure that engine is cold (not hot), and car is off
2-Place drain pan under radiator drain valve (petcock)
3-Open radiator coolant drain valve but don't remove it
4-As coolant starts to drain, open radiator cap on top
5-Remove coolant reservoir from vehicle and empty it
6-When coolant is finished draining out, close drain valve
7-Tighten the drain valve (pet cock) - don't over-tighten it
8-Refill radiator with new fluid
9-Refill the coolant reservoir

BLEED AIR FROM THE SYSTEM / BURP THE SYSTEM
* Start the car and wait for the radiator fan to kick in
* Air bubbles will escape from radiator through open cap
* Press on radiator hose a few times to help air escape
* Let the radiator fan cycle on-off a few times
* Top off radiator with more coolant as needed
* Close the radiator cap and turn off the car

WHAT ABOUT COOLANT THAT REMAINED IN SYSTEM?
This model of accord uses 8 qt or 2 gallon of coolant. One drain & fill replaces a little over 1 gallon of coolant or 50%. A second drain & fill would provide 75% new coolant in system, and a third drain & fill will result in almost 90% new fluid. In total we would use about 3 gallons of new fluid or about $60 - or less if you buy this on sale.

Space out the changes over a few hundred miles to be sure the new-old coolant mixes. Other option is to do 'coolant flush' and replace all fluid in one-go BUT be warned that Honda advises to not flush the coolant. I would recommend drain & fill method.

If you like to have good coolant in car don't wait until 120K miles to do coolant drain & fill. Do it sooner. It cost under $20 to do one.


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