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I have one of the original platinum motors lamborghini diablo VTTT with twin turbos. The car will overheat at anything more than idling. It has been at the only lamborghini repair shop in town for a month and they are unable to find the cause. Radiators have been flushed, fans work, the system has been pressure bled several times, the thermostat has been replaced.

Does anyone have any ideas?
 

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Did they also perform a CO-Test, perhaps a head gasket is shot...
 

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i just shipped my murci to LA from Vegas, Its just too hot here for the car, driving home tonight from the fights it was 103 @ 11pm.
 

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In that case Lamborghini need to re design the whole cooling system. My Black on Black C/T runs at 90 dg C here when the ambient temp is well into the 100's (F). Quite often gets to 120+
 

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I tried water wetter and it doesn't help at all when the head gasket is shot...

Later I tried radiator relief and this worked well, better than water wetter for sure.
 

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Fallen - I just went through the same thing in my Diablo.

First, make sure it was bleed properly. You have to turn on the heater, run the car until the fans kick in, then bleed. If you don't you can have an air bubble in the heater tube which is feed by the right bank only.

I would sniff the water to rule out the head gasket (and I hope that's not it)

Diablo's are know for having a faulty ground on the water temp gauge. Many people will notice that adding electrical load makes the gauge go up, like turning up the A/C, or fog lights, etc. For many people the solution is to pull the gauge, find the ground wire, then tap into it and run a wire directly to the frame inside the instrument pod.

After doing the above, my car was still indicating hot. Took a temp gun and shot it at the thermostat housing, return tubes, etc. While the gauge was reading 100 or 110, the ACTUAL water temp was perfect at 90. My gauge went out to be recalibrated and will have it installed back in the car today.

So - the short answer is:
1) sniff the water to rule out head gasket
2) measure the water temp with another source to make sure it is in fact hot and not the gauge.

Hope this helps...
 

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There is also a more technical test than sniffing the water to detect combustion gasses. I don't know its name, but I encountered it when having overheating problems with my TR (which did turn out to be a head that needed to be retorqued).

They fill a tube-like syringe with a blue liquid and then draw the air in the expansion tank or radiator through the liquid. If combustion gasses are present, it will turn the blue liquid to yellow or green. Proof positive of a leaking head or gasket. I found the test at our local radiator/AC specialist.

-- Charles
 

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this is the CO-Tester, instead of the CO-Tester you can take the sniffer you use for emissions and hold it into the expansion bottle, but take take that it doesn't get wet.
With the sniffer you can either check CO or HC...
 
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