overheating

Nissan 350z / Nissan 370z general community discussion forum
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Joined: Thu Sep 17, 2009 12:10 pm
Car: 2004 350Z

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I have a 2004 roadster that has 19000 km and is overheating every time I drive it for about 30 minutes. the oil is changed every 3000 Km....any suggestions to what could be wrong...I bought the extended warrantie but Nissan is vague about what would be covered with the cooling system....thanks for any help


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_b.jaye_
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Joined: Tue Jul 01, 2008 2:13 pm
Car: '03 350Z

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thermostat. water pump. low level of coolant... bird in your radiator... these would be good places to start. (id do the cheap checks first)

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BusyBadger
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Right off the top of my head it could be a few different things ranging from easy to detect and fairly cheap to fix to take hard(er) to detect and more expensive - just what you wanted to hear I bet.

1. Radiator cap2. Hoses3. Thermostat4. Water Pump5. Slipping/damaged/worn out fan belt

Most of these are things that the dealership should have picked up pretty quick though so it might not be any of them.

Did it one day just start overheating (an indication of a single event causing the overheating, maybe a radiator or fan blockage from road debris, or even a part being broken - or did it happen gradually over time, which points more towards a failing, but not completely broken part).

If you recently changed your engine coolant there could be air trapped in a line and giving your coolant some poor circulation issues. It could also be a bad coolant mix (wrong ratio).

If you haven't already done so you should download the FSM and go through the CO section and just start going through the troubleshooting section.

I'm sure others here will chime in but it would help if you could give us some more information.

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evildky
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step 1 check the coolant level, look for signs of leaking and make sure your overflow is topped off, you might have a tinly little leak and once it gets air int he system that air pocket causes temperature spikes

HeavyDuty
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19000 km? Like 12,000 miles on an 04? If that's not a typo, the car obviously doesn't get driven much.

Everything above is all good info. The air bubble is a common issue in certain cars as the water temp sensor can't read steam.

Overall, it's a pretty simple system. If you are mechanically inclined, do get a Factory Service Manual and follow the troubleshooting steps.



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