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Threedogs and Nipagu7, You might be onto something there, I was thinking today that with the power being a bit down, that i'd clean the MAF as i had some good contact cleaner spray handy and as the air filter was too new to be blocked, and got some of the power back, but dont know enough about MAF's breaking down to know if it can be irregular....So tomorrow I'll check and clean all the contacts and earths, but its hard to know when it might overheat again...Did about 50 k's today without skippin a beat
As always, thanks for the input guys
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Got a bee in my bonnet over this, because everything you're saying GOAT said, To the point where he nearly gave up and sold the Patrol.
Any future over heating issues will now be called GOAT syndrome, Have you read his thread last count 21 pages
did you buy your 4x4 from a salty area or now live near the beach, been to Fraser lately. All your earth straps need to be removed
cleaned properly and refitted.
Is there any member close by you can swap MAFs with just to eliminate/confirm it ????
Are your hoses in good nic, they may be collapsing under throttle?
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So i just read Goats thread, Now i'm scared about going to Nissan on Thursday :(
The Thermostat and hoses were the first things i replaced, and have replaced the bottom hose a second time since then because i wasnt happy with it (just seemed a bit soft on the bends) All before I replaced the radiator and sensors, so if they have issues with the aftermarket 3 core radiator they'll have to think again
Only thing thats making it hard to figure is being able to duplicate the issue. Its been running fine since fridays overheat, I put another thermostat in it late yesterday (genuine this time) as when it first got warm, the moment i pulled over and sat idling the needle dropped almost instantly to normal, which i would normally say was thermostat.
Hopefully Nissan will have a voltage map for the MAF and will be able to check that..
I'd sell the thing if only I could get the scammer on ebay to part with the 2009 GU he's offering for the $13000 he's askin :)
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Thermostat is in the right way eh??, sounds weird as you'd think idling it would boil. I'm not 100% convinced your radiator if giving you full flow.
where did you buy it from. is your timing spot on, you saw Goats water flow from radiator, same as what you are describing. remove the thermostat
when cold, shove a hose up there flat out just to see if it comes out at the same rate, both directions
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@zerolux, with the obvious outlay you've had up to this point, the addition of an EcuTalk readout might be a good idea.
It will show you your real temps (as opposed to putting any faith in the original Nissan temp gauge). It will display your MAF voltages, your TPS, etc., etc.
In your whole thread, I haven't seen any figure mentioned of what temperature it actually gets to. Only the mention that it overheats..
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Yeh John, I've got no faith in the Nissan gauge either, the first time this happened, the missus and mother in law were in the car on the freeway and they both swear the gauge didnt read above the usual running temp level, thats one reason i replaced the coolant sensor and the temp sensor, but as to what temp it actually gets to??? Best i can guess is well over 110 as the system is bubbling and steaming out the overflow, the hoses are still pressurised, the radiator cap is new...
But your right, what i've spent, a ECUTalk is going too be a cheap investment...
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With my experience alloy radiators are good to look at but dont cool that efficiently, also checking your dash cluster might be an option you might need to remove it to give to give to some one to go over it. Also another option is to add a couple of extra earths from the block to chassis.
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Mate, those overheating prob's are tough. I had a similar issue, turned out to be a blown head gasket. Water was circulating through the hole causing overheating. It wasn't using water, and a pressure test didn't pick it up.
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Im going through the same process now. overheating. gu 4.5l. have replaved thermostat, vicus coupling and fan. work for a bit but found that it would fill up the overflow container and not back fill. then replaced radiator cap and fixed that problem but still it overheats. am now replacing water pump, radiator, hoses, replacing thermostat housing and various other cooling items. found that the alum items very pitted and the steel cooling pipes rusted. so once all this is replaced all should be cool i hope. wife getting sick of car parts all over back table.
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Well!!!
Took the car to Nissan last week having been booked in to have the issue "fixed" They rang the missus in the afternoon said it's ready to go..They girl at Nissan Service couldnt tell her over the phone what was done, just that it was $70.00 and the mechanics could fill her in when she came to pick it up.
So when I heard, I rang nissan cause it bugged me what could be fixed for $70 that i missed, turns out that they did a diagnostics and as it said nothing, i could come get the car..F#@ktards... I'd sent it in with a list of what's been done and whats been happening, so went in and told them it was there to get fixed, and I already knew something was wrong, and they said Duh, we "think" its the head...
Heads come off, had to really, nowhere else to go......... looks like its lifted enough to stretch the head bolts which were loose, like Dashar, it looks like a hot spot where the head gasket has let go, so no water usage, and pressure tests ok, but still not sure that that explains how intermittent the issue has been.. But am getting the head reco'ed, new gaskets and bolts and hopefully back on the road mid week...
Lets see how it goes after that.
Thanks again y'all for the assistance
Jarrod
