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21st May 2019, 23:42 | #1 |
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2.0 V6 possible overheating?
Yesterday happened something strange.
Got stuck in heavy traffic in the city. Was warm weather in Denmark (around 23º) and after some time the engine temperature rose up to 99º (measured on IKE). Then I noticed some smoke coming out of the engine as well as more engine vibrations followed by a significant loss of power. As the temperature didn't reach 100º at any point, I decided to turn on the A/C in order for the fan to kick in, which in fact reduced the temperature to 90º. Anyway, I pulled over and turn the engine off, checking the engine bay. I noticed a spill of coolant. I wait until the engine temperature was around 70º then I started the engine again and keep driving and everything was fine. No spill, no power loss, no vibrations from the engine and the temp around 91º. Some facts: The thermostat was changed a few weeks ago for a reinforced one bought in DMGRS. No leaks found so far. All the 3 speeds of the Radiator fan are working. Can someone point me the direction of what could be happening?
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22nd May 2019, 00:54 | #2 | |
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22nd May 2019, 06:32 | #3 |
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Whereabouts did you notice the coolant spillage?
It's quite possible that you had an airlock if the system wasn't refilled by the book after the thermostat change. Air will heat up more than coolant and then if the bubbles find their way out through the expansion chamber they can take some fluid with them. But where you found the spilt coolant would be a great help.
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22nd May 2019, 09:24 | #4 | |
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22nd May 2019, 16:25 | #5 | ||
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The loss of power and the engine vibrations makes me a bit nervous about what actually could have happened. Maybe a lack of spark in the front cylinders due to moisture as slovcan mentioned? So seems I need to do a proper coolant refilling following the MGRs method.
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22nd May 2019, 17:44 | #6 | |||
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22nd May 2019, 18:33 | #7 |
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And the most important question. How much water did you loose?
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22nd May 2019, 19:20 | #8 | |
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What is the optimal running temperature of the KV6? If 98° or 99° isn't normal then the fan should kick in before engine can reach this temperatures, don't you agree? Or MG Rover had other thoughts? 🙄 Good question. The level was around 2 fingers below the MIN mark placed in the right side of the expansion tank. Enviado do meu Redmi Note 6 Pro através do Tapatalk
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22nd May 2019, 19:32 | #9 |
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Or there again, how much did the coolant drop after the belch?
Sounds to me that you had an airlock but it then cleared itself with the “burp” and then it was fine afterwards. If an airlock then I would have expected the coolant level to go down in the expansion tank after first overflowing, OK you lost some through the cap, but level of drop in the expansion tank suggest to me an airlock. Mine overheated and vented coolant when I first bought it despite a working fan and minus 12 outside, caused by an airlock, but at a much higher temperature. Didn’t notice any power loss but then again I struggled to get home on barely tickover as the temperature shot up as soon as I pressed the engine. The car had rejected all “professional” attempts to bleed it. It's been fine ever since I bled it and my normal temp is around 95 / 96. If the machine is happy now I’d continue to use it, monitoring the IPK temperature as you are doing and checking the coolant. Refilling the coolant again and risking another airlock seems asking for trouble. Regards |
22nd May 2019, 21:32 | #10 |
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I think the fan is set to kick in at 104F. Oops, 104C.
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Southern Slovakia Anything can happen in Formula 1 and usually does - Murray Walker 1999 Triumph Trophy 900, Saddlesore 1600, Iron Butt Riders Association #63720 2005 Rover 75 CDT Tourer MK2 Last edited by slovcan; 22nd May 2019 at 21:34.. |
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