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I HAVE A 2006 G35 THAT KEEPS OVERHEATING I HAVE ALREADY BURPED

Customer Question
THE SYSTEM PLENTY OF TIME...
I HAVE A 2006 G35 THAT KEEPS OVERHEATING I HAVE ALREADY BURPED THE SYSTEM PLENTY OF TIME AND THE OVERHEATING COMES BACK DAYS LATER
JA: Sometimes things that you think will be really complicated end up being easy to fix with a Infiniti. The Infiniti Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: I HAD IT PRESSURE TESTED, MY HEADS ARE GOOD NO LEAKS, MY UPPER RADIATOR HOSE IS HOT BUT THE BOTTOM IS COLD COOLANT
JA: Patching a radiator hose can be tricky, but with the right information -- fixable. Luckily, the mechanic I'm going to connect you with knows all the tricks and shortcuts. Are you hoping to fix this yourself?
Customer: IM NOT SURE YET DEPENDS ON HOW SERIOUS THE PROBLEM IS'
JA: Is there anything else important you think the Infiniti Mechanic should know about your Infiniti?
Customer: THATS IT
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Infiniti Mechanic about your situation and then connect you two.
Submitted: 1 year ago.Category: Infiniti
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Answered in 2 hours by:
4/23/2016
Infiniti Mechanic: Matt, Engineer replied 1 year ago
Matt
Matt, Engineer
Category: Infiniti
Satisfied Customers: 22,161
Experience: Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
Verified
Hello As a very first check make sure the coolant level is correct / up to the mark on the tank, then I'd first check that the radiator cooling fan is coming on as it should and if thats OK then replace the thermostat in the engine.Whilst the thermostat is being replaced you might as well also reverse flush the cooling circuit (remove top hose to rad and use a hosepipe to push water into the engine until you get clear water out of the radiator hose) and top up with 30-50% fresh antifreeze. Also check that the small diameter bleed hoses that run from the top of the radiator and the top of the engine aren't blocked as this allow the air to vent back to the header tank automatically.If you still have a problem then check that the water pump impeller / turbine isn't spinning on its shaft. You should be able to achieve this by removing the bottom hose from the engine and use a screwdriver or similar to feel for the water pump impeller blades, whilst your assistant turns the engine over by hand.If you can stop the impeller with slight pressure from the screwdriver the pump needs replacing. Also its possible the belt is slipping so its worth replacing its especially if the rubber ribs are cracked or it looks shiny on flat side of the belt - while its off check that the tensioner and other pulleys all spin freely the exception to this is the AC pump ( if fitted) I'd also suggest ensuring that you've got all the air out of the system as this sort of episode can leave pockets of air trapped and prevent the coolant from circulating properly. So check that the small hoses that run from the top of the engine and radiator that run back to the header / expansion tank are free flowing and not blocked If these are OK then remove the tank pressure cap and run the engine from cold with the heater set to full hot As the engine starts to warm, squeeze the large hoses running to the radiator to help displace any air - all the time keeping an eye on the level in the header tank, making sure it doesn't drop below the minimum and open any bleed screws built into the top cooling hoses - closing them off as soon as they start to gush water Once the engine is up to temperature the tank should be quite full. Switch the engine off and leave it to cool Then top up to the mark once its all cold and replace the cap
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Infiniti Mechanic: Matt, Engineer replied 1 year ago
Hido you still need help?Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you
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Matt
Matt
Matt, Engineer
Category: Infiniti
Satisfied Customers: 22,161
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Experience: Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.

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