Tools you need for thermostat on a 2012-2016 Honda CR-V

On the 4th-gen CR-V the thermostat lives in a housing bolted low on the transmission side of the K24 block, right where the lower radiator hose connects. That means you are not touching anything under the hood except the radiator cap — the whole job happens from underneath with the splash shield off. Two 10 mm nuts, one spring-band hose clamp, a new O-ring, and you are done.

The part people get wrong is the refill. These engines trap air easily, and a bad bleed gives you cold heater vents and a temperature gauge that climbs in traffic, which owners then blame on the new thermostat. Use a spill-free funnel, run the engine with the heater on max until the radiator fan cycles twice, and recheck the reservoir cold the next morning.

Complete tool and parts list

Differences within the 2012-2016 generation

Every 2012-2016 CR-V sold in North America uses the 2.4 L K24 (K24Z6 for 2012-2014, K24W for 2015-2016 with direct injection and the CVT), and both use the same low-mount thermostat housing with two 10 mm cover nuts. The 2015-2016 earth-dreams engine has a slightly different accessory and cover layout up top, but the thermostat access from below is unchanged. AWD models have no extra hardware in the way beyond the same splash shield.

Torque specs

How the job goes

1. Work on a cold engine. Chock the rear wheels, raise the front of the CR-V and set it on jack stands.
2. Remove the under-engine splash shield: 10 mm bolts around the perimeter plus several plastic push clips.
3. Open the radiator cap (cold), then open the plastic drain plug at the lower corner of the radiator and drain the coolant into a pan. Expect about 4-5 quarts; the block will not fully drain.
4. Locate the thermostat housing low on the transmission side of the block, where the lower radiator hose attaches.
5. Slide the spring clamp back with hose clamp pliers and twist the lower radiator hose off the housing neck. Have the pan ready — more coolant will come out.
6. Remove the two 10 mm nuts holding the thermostat cover to the studs. Pull the cover off and note which way the thermostat faces.
7. Lift out the old thermostat and O-ring. Wipe the housing sealing surface clean with a rag and plastic scraper; do not gouge the aluminum.
8. Fit the new O-ring onto the new thermostat, then seat it in the housing with the spring/jiggle pin facing into the engine and the air bleed hole or jiggle valve at the 12 o'clock position.
9. Refit the cover, start both nuts by hand, then torque to 9 ft-lb (12 Nm). Do not overtighten into the aluminum.
10. Reinstall the lower radiator hose and seat the spring clamp back on the bead. Close the radiator drain plug hand tight.
11. Fit the spill-free funnel to the radiator neck, fill with Honda Type 2 until coolant sits in the funnel, and squeeze the upper hose a few times to push out air.
12. Start the engine with the heater on max heat and fan low. Let it idle until the thermostat opens and the cooling fan cycles twice, topping up the funnel as the level drops.
13. Shut off, let it cool slightly, remove the funnel, set the radiator level to the neck, cap it, and fill the overflow reservoir to MAX.
14. Reinstall the splash shield, lower the car, then drive it and recheck the reservoir level cold the next day. Check for leaks at the cover and hose.
15. Recycle the old coolant at an auto parts store or municipal collection point.

Watch out

The 10 mm cover nuts, radiator plastic drain plug and lower-hose location are standard across the 2012-2016 K24 CR-V, but confirm the thermostat part number and the 12 Nm cover torque against the factory service manual for your exact year.

Other jobs on the 2012-2016 Honda CR-V

Thermostat Replacement on other vehicles