engine overheat NISSAN MURANO 2012 2.G Towing Guide

2012 NISSAN Towing Guide 20 The added weight of a trailer places an increased load on the engine and cooling system, so
monitor your coolant temperature gauge and automatic transmission fluid temperature gauge
(if equipped) carefully. At the first sign of overheating, pull to the side of the road. See IF
YOUR ENGINE OVERHEATS later in this section for more information.

HILLS – DOWNGRADES
While going downhill, the weight of the trailer pushing on the tow vehicle may decrease
overall stability. Therefore, to maintain adequate control, reduce your speed and shift to a
lower gear. If your vehicle is equipped with Tow Mode, see your vehicle owner’s manual for
information about the use of this function.
Avoid long or repeated use of the brakes when descending a hill, as this reduces their
effectiveness and could cause overheating. Shifting to a lower gear instead provides “engine
braking” and reduces the need to brake as frequently.

AUTOMATIC CRUISE CONTROL
Do not use cruise control while towing a trailer.

IF YOUR ENGINE OVERHEATS
A moderate increase in engine operating temperature is normal when towing a trailer. If,
however, the coolant temperature gauge reading is abnormally high, or if you are experiencing
a significant loss of power, or if you hear unusual engine noises,* the engine may be
overheating and you should immediately take the following steps:

1. Pull your vehicle safely over to the side of the road, out of traffic. Apply the parking brake
and move the gearshift lever to NEUTRAL (manual) or PARK (automatic). DO NOT STOP
THE ENGINE.

2. Turn off the air conditioning and, after opening all the windows, turn the heater on to
maximum hot and the fan to its highest speed. The heater core in your vehicle is just like a
miniature engine radiator and will provide an extra cooling surface to help reduce engine
temperature.

3. If the temperature does not drop or continues to increase, stop the engine immediately.

4. Being cautious of traffic, step out of the vehicle and, from a safe distance, look for steam
underneath the engine. If you see steam or leaking coolant, stand clear to avoid being
burned and shut off your engine immediately and allow it to cool. If there is no steam, open

* See your vehicle owner’s manual for additional indications that your vehicle may be overheating.

2012 NISSAN Towing Guide 21

the hood. Never remove the radiator cap when the radiator is hot. If the cap is removed
under these conditions, hot water/coolant under high pressure may spurt out, possibly
causing serious injury.

5. As soon as the engine has cooled to its normal operating temperature, visually inspect the
drive belts for damage or looseness. A loose belt reduces water pump efficiency. Be
careful to keep your hands, hair, jewelry, and clothing clear of the running drive belt and
other moving parts when inspecting the engine and radiator. Also check to see if the
cooling fan is running, and inspect the water pump, radiator, and radiator hoses for leaks.
Keep in mind, too, that if your vehicle is equipped with an electric fan motor, it may start
without warning any time the coolant temperature is high. If you find leaking coolant, a
loose or missing drive belt, or an inoperable fan, turn off the engine immediately.

6. If no leaks are apparent and all other components appear to be operating properly with
the engine cooled to its normal operating temperature, check the coolant level in the
reservoir tank with the engine running. Add coolant to the reservoir tank if needed. At this
point, if repairs are required, go to the nearest NISSAN dealer. See the IN CASE OF
EMERGENCY section of your vehicle owner’s manual for additional information on
overheating.

NOTES – All NISSAN vehicles have an engine protection mode, which helps reduce the
chance of engine damage if the engine coolant reaches a specified temperature. See your
vehicle owner’s manual for details.

1 Maximum Trailer Weight values are calculated assuming a base vehicle with driver and any
options required to achieve the rating. Additional passengers, cargo and/or optional
equipment will add weight to the vehicle and reduce your vehicle’s maximum towing
capacity and trailer tongue load.

2 Use of a weight-distributing hitch system is recommended when towing over 5,000 lbs.

3 The Maximum Trailer Weight and Gross Combined Weight ratings for 5th wheel and
gooseneck trailer towing are the same as specified for conventional trailer towing.

4 Most states require a separate braking system on trailers with a loaded weight above a
specific amount. Check local ordinances. 7-pin connector trailer wire harnesses are
required for use with trailer brakes (available separately).