How to Insulate Heating and Coolant Pipes in 2011 2012 Nissan LEAF

Several LEAF owners have reported increased range and heating efficiency by as much as 20% by using this method.[1]
Run the heater for 5-10 min to locate the hot liquid circuit. Unplug thecar from charger.

Turn the steering wheel straight and leave the door open and wait two minutes before removing the battery terminals.

IMPORTANT: If your LEAF is equipped with a 12v Rear Spoiler Solar Panel, cover it with a card board or a similar opaque sheet before disconnecting the 12v battery.

Disconnect and remove battery terminals.

Detach the fuse box on the front of the battery harness (clips) and a wire bunch clipped in 2 places.

Remove the battery harness (4x 12mm bolts).

Cut the pipe insulation foam to length for different pipe sections (most 10-12 inches long) and wrap the warm pipes with it. A handful of plastic clamps have to be opened to make it easier. The warm circuit starts underneath the battery, goes to a temperature sensor and up to the center of the cabin. Back out to the cabin to the tank in the front right and then straight down to the heater core. Make sure to cover the sensor with insulation tube.

Remove the front cover (8 plastic locks) and unbolt the tank in the front right corner. Wrap it with fiberglass or foam padding, leaving the metal cap exposed. Hold it in place with pieces of Gorilla tape.

Put everything back in.
Thermal images of 2011-2012 Nissan LEAF Heating Pipes. Upper left shows the center vents where the warm air blows out at about 91F. (You can also see the heated steering wheel). The other pictures show the engine compartment. Upper right shows the primary hot spot. That’s the junction where the heater fluid sensor is located. No insulation! You can also see the “quality” of the insulation that reduces the temp by about 17F. OK, it is better than nothing. Bottom left picture follows the pipe where the sensor is to the left. It focuses next to the clip where the two pipes are held in place. Bottom right shows the heater fluid tank close to the drivers side head lamp. In blue you can see the cap. It shows the temps in degree Celsius but with 100F it is just as hot as the sensor location.

Things You’ll Need
2.5m of self adhesive insulating tubes. Best quality from professional insulation supplier recommended as cost is insignificant. If professional insulation supplier is hard to find, Home Depot, Lowes, etc. is okay.

Cable binders.

Card board

(Optional) Fiberglass Insulation padding OR Foam Insulation Padding for coolant tank and Gorilla tape.

Sources and Citations
Instructions from Users: ericsf, and hornstudio (

Pictures from User: hornstudio, BetterLeaf, and EVerlasting

Cite error: tags exist, but no tag was found

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