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Re: Head gasket blown
The following posts are from another thread but since the problem turned out to be this one I have transferred key posts here:
23 july 07
quote:
John Deere wrote:
I am not sure that I am experiencing this problem but this is what has happened to me.
I was driving back from Jindabyne on Sunday, check engine light came on and I experienced a loss of power. I pulled over, checked oil and no problem. I looked in the manual it said we coul drive if the light was not flashing (it wasn't) but son't go over 80kph. We drove for a minute or two and the temperature suddenly shot off the scale hot!!
We pulled over and the gauge dropped as fast as it went up. We drove another 3-4km to the nearest service station keeping the temp below Hot and checked the radiator. Bone dry. The car had the coolant checked on Friday, all was normal.
I filled the radiator and began to drive, temperature climbed rapidly, so back to the service station. NRMA came out, pressure tested the cooling system, it was not losing pressure. I drove 17km to Canberra keeping the temperature as low as possible and it now sits in Canberra waiting for diagnosis.
The vehicle is a 4/04 build and has done 130,000km.
I will convey the mechanics diagnosis, but it is not looking good for the head gasket (possibly head and other usual victims of an overheating issue.) The cause is what I am most interested in though, it could be a dodgy thermostat, but I have noticed some of the symptoms are consistent with the butterfly screws being loose.
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27th July 07
quote:
John Deere wrote:
The latest on my Xtrail is this:
The mechanic could not get it to heat up until he got it under a decent load, up hill accelerating. He pulled the radiator out as he was not convinced that the head gasket was blown, and his radiator specialist found that the radiator was 60-70% blocked! It has been cleaned and refitted, he is tesing it again this weekend under load. If it does not heat up, he will be giving it a clean bill of health.
His radiator guy has said that he has unblocked at least half a dozen Xtrail radiators over the last few years.
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Today:
quote:
Rybky wrote:
What was it blocked with? Our old friend casting sand by any chance??
Most likely.
It also turns out that the head gasket was blown and symptoms showed up about 4 weeks after the initial OK was given.
$2k later we are back on the road.....Nissan want to know nothing about it!
All I can say is, get your radiator out, tanks removed and properly cleaned at 100,000k or it could cost!
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15/Oct/2007, 6:07 pm
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Re: Head gasket blown
Hi Greg,
Thanks for moving your posts to this thread. Much appreciated.
I'm happy that the problem is solved and your exy back on the road again, but I am unhappy that Nissan didn't listen to your complaints about this.
Please make a formal complaint letter about this, along with detailed reports of your service, the last time the radiator was flushed and coolant replaced, what type of coolant was used, put all names of workshops and dealers (if it was serviced by a dealer) on paper and shoot it across to me at the admin email address and I will make sure your complaint reaches the National Service Manager at Nissan head office. They can contact you directly if they need more information.
I can't promise anything, but at least we will let Nissan be aware of it, as this is been happening to other members too and around the same mileage.
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15/Oct/2007, 7:27 pm
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Re: Head gasket blown
It seems very odd Jalal that it consistently takes so long for the sand to make its way into the radiator.
Are we sure it is not something like a radiator flush or other service procedure which is done at 100k that causes the sand to move ?
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Kev X450(c)
2003 Titanium Ti Luxury Series 1 |
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16/Oct/2007, 12:03 am
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Re: Head gasket blown
Hi Kev,
As I stated previously in another thread, Rockdale Nissan told me that they had received such cases as well, but nearly in all cases where casting sand was involved, the incorrect coolant was used by owners and/or the flush wasn't done correctly.
So it is very important to stick to the correct coolant type and that is why I also said, it's not worth the risk of saving a couple of bucks to buy another coolant brand instead of Nissan's.
I had my radiator flushed at the 80K service and the dealer confirmed no casting sand and no blockage, but I will keep monitoring this as I get to the 100K and see what happens.
At least the flush is recorded in the Nissan system and has been done by them, so if anything goes wrong, I'll know who to blame.
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16/Oct/2007, 12:10 am
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Re: Head gasket blown
Oscar,
With all due respect to your mechanic but if you exy stays in limp mode (also called go home mode) it means the repair was not carried out correctly or he did not perform the required re-setting of the ECU to get the car out of the limp mode and into standard operational mode.
The limp mode does exist in our exy and it is controlled by the ECU which detects something seriously wrong with any part of the car (and especially the engine) and limits the speed and revs which will only allow you to drive the car home or to the nearest mechanic without causing further damage.
Two questions come to mind which you will need to ask your mechanic:
1. Has he done the engine block pressure test when he changed the gasket and machined the head?
2. Has he checked the condition and operation of the O2 (oxygen) sensor?
A faulty O2 sensor will send your exy into limp mode for sure, but even more so an un-pressurized engine head.
The car would need to have all sorts re-setting to do when the head gasket is replaced and since he has the diagnostics equipment to plug into the ECU he should have done all that when he finished.
Driving the car while in limp mode will NOT solve the problem and he should NOT be giving you this advice at all.
Last edited by jalalski, 15/Dec/2007, 6:27 pm
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15/Dec/2007, 3:47 pm
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Re: Head gasket blown
quote:
FLY00A wrote:
Hi Jalal.
I rebuilt it myself 
Well, that could explain the problems then. hehehehehe 
quote:
My mechanic only plugged in his ConsultII to clear any fault codes.
If he cleared the fault codes without you actually noting what they're, these faults will come back unless they're addressed.
quote:
I should've mentioned that it isn't in limp mode. I think I exaggerated a little- its only really dropping revs when Im off the throttle.
Two different problems all together. The limp mode will not allow you to go past lower RPM ranges no matter how hard you press the accelerator.
I am not sure what you have done AFTER the rebuilt but it not a matter of putting everything back and away you go type of thing, but am sure you know that already
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15/Dec/2007, 6:24 pm
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Re: Head gasket blown
