KV6 running hot

Geoff130 · 12th July 2018, 19:38

I have a ZT190 that the digital readout on my Android head unit says is running between 95 to 103 degrees. At this temperature the hoses do not seem to be excessively pressurised. An infrared thermometer shows the outside of the top hose at 85 degrees, radiator core at 75. Could this be a faulty sensor or should I be looking for a cause of genuine overheating?

kaiser · 13th July 2018, 06:26

I don't think that is too hot, if in town or slow traffic. The V6 is a hot running engine!

On open road between 85 to 95.
In town it will go up to the start temperature of the the fan, which is what you see.

Just make sure the system is full, and the fan comes on, and there is no reason to worry.

But always keep an eye on it.

If too hot, a stuck thermostat is often the cause, or more often a faulty fan.

Geoff130 · 13th July 2018, 19:28

Thanks, that seems OK then, the fan is working and the open road readings are as you say. I always keep an eye on the coolant level, it had a leaking pipe to the oil cooler, when I bought it, now replaced with a stainless steel one with new hoses too.

kaiser · 14th July 2018, 06:47

Yes, you are fine!
But don't get complacent.
These car can make you go from hero to zero, pretty fast.
No reason to be paranoid, but all the more reason to be vigilant!
And don't rely on temp gauge. Will show "normal" for anything between 75 and 115 degrees.!

That is not much help!

12th July 2018, 19:38	#1
Geoff130 Loves to post MG ZT 190, Rover 75 CDTi, Honda VFR 750, Honda CB550F Join Date: Aug 2010 Location: Derby Posts: 393 Thanks: 75 Thanked 36 Times in 28 Posts	KV6 running hot I have a ZT190 that the digital readout on my Android head unit says is running between 95 to 103 degrees. At this temperature the hoses do not seem to be excessively pressurised. An infrared thermometer shows the outside of the top hose at 85 degrees, radiator core at 75. Could this be a faulty sensor or should I be looking for a cause of genuine overheating?

13th July 2018, 06:26	#2
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	I don't think that is too hot, if in town or slow traffic. The V6 is a hot running engine! On open road between 85 to 95. In town it will go up to the start temperature of the the fan, which is what you see. Just make sure the system is full, and the fan comes on, and there is no reason to worry. But always keep an eye on it. If too hot, a stuck thermostat is often the cause, or more often a faulty fan. __________________ Worth his V8 in gold Last edited by kaiser; 13th July 2018 at 06:33..

14th July 2018, 06:47	#4
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Yes, you are fine! But don't get complacent. These car can make you go from hero to zero, pretty fast. No reason to be paranoid, but all the more reason to be vigilant! And don't rely on temp gauge. Will show "normal" for anything between 75 and 115 degrees.! That is not much help! __________________ Worth his V8 in gold

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13th July 2018, 19:28	#3
Geoff130 Loves to post MG ZT 190, Rover 75 CDTi, Honda VFR 750, Honda CB550F Join Date: Aug 2010 Location: Derby Posts: 393 Thanks: 75 Thanked 36 Times in 28 Posts	Thanks, that seems OK then, the fan is working and the open road readings are as you say. I always keep an eye on the coolant level, it had a leaking pipe to the oil cooler, when I bought it, now replaced with a stainless steel one with new hoses too.