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Jake
Jake, Nissan Technician
Category: Nissan
Satisfied Customers: 4001
Experience:  Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
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Hi. My Grandfather has a Nissan X-Trail 2001 SE+. Recently,

Customer Question

Hi. My Grandfather has a Nissan X-Trail 2001 SE+.
Recently, he has noticed that when you exert the car, going up a hill usually, the temperature gauge spikes and goes hot. However, within a minute or so after you stop the exertion, the gauge drops back to 'normal'.
He's done a lot of trouble shooting with various garages and nobody can seem to diagnose the problem.
Within the last couple of months he has had the water pump, thermostat and sensor changed and has, just today, had the radiator thoroughly flushed and cleaned.
None of these options have had any impact and the problem still occurs. All of the new parts have been checked since they were fitted and are in working order.
Greatly appreciative of any advice or guidance that you can give.
Submitted: 3 years ago.
Category: Nissan
Expert:  Jake replied 3 years ago.
Hi there, does this only happen under load? Does it spike the gauge or climb slowly to hot?
Customer: replied 3 years ago.

Hi Jake,


 


Thanks for your response.


 


Yes, it only happens under load. It's usually up a hill but has happened when overtaking also.


 


The gauge climbs to hot over a couple of seconds and, when you stop the load (e.g. going down the hill), it descends at roughly the same rate.

Expert:  Jake replied 3 years ago.
Thanks, as long as the gauge is climbing like you mentioned and not spiking then we can safely assume that the coolant temp is actually rising and it's not an issue with the sensor or meter itself.

Why the increased load is preventing the cooling system from keeping coolant temps down is our obvious concern here then and after looking at what's already been replaced your options are limited.

The first thing you might want to do is a hydrocarbon test to see if the headgasket has a small leak into the cooling system. This can certainly effects temps under load.

Next you may want to test the thermostat to make sure it's not sticking and be certain that the coolant/water mix is 50/50 since the water boils more easily if their is insufficient coolant.

These sound simple but are commonly overlooked.

Talk to you soon.