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It over heats with ac on have had about every new part installed
2007 Nissan Murano

It over heats with Ac on have had about every new part installed

(2007 Nissan Murano)
Heads done twice two water pumps four thermostats two radiators timing assembly cross over pipe fans checked Ac freon checked new anti freeze Run and sounds fine all checks out turn on Ac overheats again HELP PLEASE
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2 answers & 7 comments
Popular Answer
on August 05, 2016
FIRST- Who has done all this work , a shop? HOW is the diagnostic process being handled?
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on August 05, 2016
First wife overheated it and split radiator and warped the heads drove to far. Reputable machine shop did work. Didn't overheat all winter no ac. Summer started in again. Took to Nissan and they tried to figure it out. Couldn't hence cross over pipe that was ok. They said it wasn't Nissan parts and thermostat wasnt ,tore apart and it was. They don't know ether. They suggested I take it back to my mechanic. That's why the job was all done again under warranty and replaced all the parts since was apart again. Thanks hope to hear back
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on August 05, 2016
FIRST- Who has done all this work , a shop? HOW is the diagnostic process being handled?
Sign in to reply
on August 05, 2016
First wife overheated it and split radiator and warped the heads drove to far. Reputable machine shop did work. Didn't overheat all winter no ac. Summer started in again. Took to Nissan and they tried to figure it out. Couldn't hence cross over pipe that was ok. They said it wasn't Nissan parts and thermostat wasnt ,tore apart and it was. They don't know ether. They suggested I take it back to my mechanic. That's why the job was all done again under warranty and replaced all the parts since was apart again. Thanks hope to hear back
on August 07, 2016
One more question , so if you DON'T use the A/C , does it still overheat? Are the radiator fans working properly? Coming on at the correct temp?
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on August 07, 2016
Ac off it don't over heat. The fans have three speeds and they check out with diagnostics. My thought fans running backwards they working fine per Nissan and Fidlers machine shop. No combustion gas in cooling system ether. Ac high low side checks out ,right specks
on August 07, 2016
More questions if you have patience. Just trying to isolate any and all conditions-when it overheats , with the A/C on, as originally stated, is that when its sitting idling only , or will it overheat , even at cruising speeds (50-65 mph). In other words --THE ONLY TIME IT OVERHEATS , is sitting idling with the A/C on. If you turn the A/C off it runs normal temp , and off idle (normal driving) with the A/C on it runs normal temps.?
on August 08, 2016
When idling in park and driving with no ac don't overheat. Ac on idling in park won't over heat. Drive the car no ac don't overheat. Drive the car and turn on ac go half mile it's ready to boil over.
on August 08, 2016
This ones really got me curious!! I wish it wasn't so far away , this is my kind of challenge, unfortunately at this point , with what you've told me , my next step would be to drive it with a scanner and monitor any data relating to fans and A/C clutch etc. I presume NISSAN was able to duplicate symptom and tried for more than just a few minutes. Do you know what skill level the tech(s) where , that were working on it?
on August 09, 2016
The tech skill level I don't know. Shop manager don't know either,at Nissan. They try to blame a different shop because it wasn't Nissan. They wanted to check catalytic converters for being plugged. Didn't replace no loss of power. Bolts rusted so we will have to replace. They were just throwing parts at her. I told them to check hubcap bearing Ha. They were bleeding me dry. So I took it back to my mechanic. He has had it on his scanner during drives. He says its normal. He is on a data base service he pays for monthly and I think it has everyone befuddled. I don't give up easy but my wallets getting a little thin. My warranty work has my mechanic upside down now to. Thank you
on August 10, 2016
It sounds like , despite his inability to figure this one out , at least for the time being , you've got a good regular shop to deal with.the VIN#, I'll see what else I can find in 24hrs. Otherwise, best of luck to you!

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