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    991 engine overheat

    Stuck in traffic yesterday (M25 motorway) when engine overheats. Cue a three hour wait for recovery whilst enduring a few choice comments from the motoring public in the UK.....

    Car currently at dealer who have confirmed front offside fan failure. Now just waiting to hear if warranty will cover it......laugh


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    991 (what a car!) XC90 - 120 Cab - 2 kids, 1 dog


    Re: 991 engine overheat

    Sorry to hear about this. If this is not covered by warranty, then what is

    Can they establish whether the engine overheated to a serious extent? Or there was a warning message prior to that happening?

    BTW, shouldn't something like this be avoided by the operation of Start-Stop? i.e. engine not left idling in stationary traffic?


    --

    "Form follows function"


    Re: 991 engine overheat

    Stop-start deactivated itself and although warning light came on, it wasn't safe to pull up. Hoping not too much damage.

    They advised initially that it may not be covered if it was a stone or something that jammed the fan.....still waiting to hear.


    --

    991 (what a car!) XC90 - 120 Cab - 2 kids, 1 dog


    Re: 991 engine overheat

    bridggar:

    Stop-start deactivated itself and although warning light came on, it wasn't safe to pull up. Hoping not too much damage.

    They advised initially that it may not be covered if it was a stone or something that jammed the fan.....still waiting to hear.

    If so, could the possible damage be covered by your Motor Insurance policy as accidental damage?

    Stop-start was deactivated as a result of the fan problem? Strange.


    --

    "Form follows function"


    Re: 991 engine overheat

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.


    --

    2014 991 Carrera 4S | Dark Blue Metallic | PDK | S-PASM (-20mm) | PSE
    2010 Audi S5 cabrio | Ibis White


    Re: 991 engine overheat

    bridggar:

    Stop-start deactivated itself and although warning light came on, it wasn't safe to pull up. Hoping not too much damage.

    They advised initially that it may not be covered if it was a stone or something that jammed the fan.....still waiting to hear.

    Hope you didn't take it to Hatfield, Derek and his team will further mess it up as they did my heated seats 👎


    Re: 991 engine overheat

    bluelines:

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.

    Fan cools the radiator which cools the water which cools the engine.  No Fan = Hot water = Hot engine.


    Re: 991 engine overheat

    Leawood911:
    bluelines:

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.

    Fan cools the radiator which cools the water which cools the engine.  No Fan = Hot water = Hot engine.

    ...but the radiators are in the front and the fans in the rear over the engine. So?


    --

    2014 991 Carrera 4S | Dark Blue Metallic | PDK | S-PASM (-20mm) | PSE
    2010 Audi S5 cabrio | Ibis White


    Re: 991 engine overheat

    bluelines:
    Leawood911:
    bluelines:

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.

    Fan cools the radiator which cools the water which cools the engine.  No Fan = Hot water = Hot engine.

    ...but the radiators are in the front and the fans in the rear over the engine. So?

    I think you are confusing a couple of things here. The fans in the rear over the engine are not engine cooling fans. Smiley


    --

    RC (Germany) - Rennteam Editor Porsche 991 Turbo S, Porsche Boxster S (981), Jeep Grand Cherokee SRT (2014), BMW X3 35d (2013)


    Re: 991 engine overheat

    The front radiators have thermostat controlled fans cooling them when the temperature is above a point and when the car is not moving fast enough so there is no ram air effect to cool the radiators.

    The fans in the rear take out temperature from the engine compartment when the spoiler is down.


    --

    "Form follows function"


    Re: 991 engine overheat

    RC:
    bluelines:
    Leawood911:
    bluelines:

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.

    Fan cools the radiator which cools the water which cools the engine.  No Fan = Hot water = Hot engine.

    ...but the radiators are in the front and the fans in the rear over the engine. So?

    I think you are confusing a couple of things here. The fans in the rear over the engine are not engine cooling fans. Smiley

    Are they engine heating fans? Smiley

     

     


    --

    2014 991 Carrera 4S | Dark Blue Metallic | PDK | S-PASM (-20mm) | PSE
    2010 Audi S5 cabrio | Ibis White


    Re: 991 engine overheat

    reginos:

    The front radiators have thermostat controlled fans cooling them when the temperature is above a point and when the car is not moving fast enough so there is no ram air effect to cool the radiators.

    The fans in the rear take out temperature from the engine compartment when the spoiler is down.

    Thank you! Smiley

    The fans in the front are inside the radiators?


    --

    2014 991 Carrera 4S | Dark Blue Metallic | PDK | S-PASM (-20mm) | PSE
    2010 Audi S5 cabrio | Ibis White


    Re: 991 engine overheat

    bluelines:
    RC:
    bluelines:
    Leawood911:
    bluelines:

    Eh, pardon my stupidity, but how much cooling does the two toy fans actually provide? I thought the engine is water cooled.

    Fan cools the radiator which cools the water which cools the engine.  No Fan = Hot water = Hot engine.

    ...but the radiators are in the front and the fans in the rear over the engine. So?

    I think you are confusing a couple of things here. The fans in the rear over the engine are not engine cooling fans. Smiley

    Are they engine heating fans? Smiley

     

     

    They do not cool the engine. Period.


    --

    RC (Germany) - Rennteam Editor Porsche 991 Turbo S, Porsche Boxster S (981), Jeep Grand Cherokee SRT (2014), BMW X3 35d (2013)


    Re: 991 engine overheat

    bluelines:
    reginos:

    The front radiators have thermostat controlled fans cooling them when the temperature is above a point and when the car is not moving fast enough so there is no ram air effect to cool the radiators.

    The fans in the rear take out temperature from the engine compartment when the spoiler is down.

    Thank you! Smiley

    The fans in the front are inside the radiators?

    behind


    --

    "Form follows function"


    Re: 991 engine overheat

    Sorry to hear that mate, hope they will place this issue under warranty. Even a stone shouldn't kill the entire system, and also how does one get a stone idling in traffic anyways? 


    --

    1991 BMW 535i Granitsilber/White Leather

    Ex: '91 BMW 318i, '89 BMW 525i, '74 Mercedes-Benz 280E, '87 BMW 325is, '86 BMW 325e, '05 Ford Focus ZX4 S, '85.5 Porsche 944

    
    

    Re: 991 engine overheat

    Not covered by warranty apparently. Seems a stone jammed one fan causing it to stop. Other fan on it's own s not sufficient to col the system.  The good news is that they will only charge 30 minutes labour and no harm done to engine. Will pick it up this morning. It did need a clean anyway so.....


    --

    991 (what a car!) XC90 - 120 Cab - 2 kids, 1 dog


    Re: 991 engine overheat

    bridggar:

    Not covered by warranty apparently. Seems a stone jammed one fan causing it to stop. Other fan on it's own s not sufficient to col the system.  The good news is that they will only charge 30 minutes labour and no harm done to engine. Will pick it up this morning. It did need a clean anyway so.....

    Smiley

    Good stuff. Great it got resolved so easily and no harm done.


    --

    2014 991 Carrera 4S | Dark Blue Metallic | PDK | S-PASM (-20mm) | PSE
    2010 Audi S5 cabrio | Ibis White


    Re: 991 engine overheat

    @bridggar: this is good news under the circumstances.

    These Porsche air intakes, except the ones on the GT3, are totally unprotected, unfortunately. Radiators that are in front of the fans, often get pierced by stones, are corroded by the accumulation of leaves and debris. When I get my car washed I ask the people there to clean the ducts with pressurized air. You cannot imagine what comes out. One time I found a small bird  surprise

    I don't want to get you into doubts but for general knowledge, what is the method of determining whether the engine seriously overheated? It is through engine symptoms or through the diagnostic tester e.g. with a memory of the highest temperature attained?


    --

    "Form follows function"


    Re: 991 engine overheat

    reginos:

    @bridggar: this is good news under the circumstances.

    These Porsche air intakes, except the ones on the GT3, are totally unprotected, unfortunately. Radiators that are in front of the fans, often get pierced by stones, are corroded by the accumulation of leaves and debris. When I get my car washed I ask the people there to clean the ducts with pressurized air. You cannot imagine what comes out. One time I found a small bird  surprise

    I don't want to get you into doubts but for general knowledge, what is the method of determining whether the engine seriously overheated? It is through engine symptoms or through the diagnostic tester e.g. with a memory of the highest temperature attained?

    @ Bridgar:  You are not the first to suffer from a fan jamming due to road debris getting caught between its rotor and its shroud. There's only a small gap to maximise the fan's efficiency and it only takes a small item to be thrown up from the road surface from behind the shroud (by a tyre or the air stream) to get caught and jam it. The debris will not have passed through the radiator and AC condenser in front of the fan. 
    I assume that you had already stopped and called for assistance as a result of a display warning of excessive coolant temperature, and didn't wait for steam to start billowing out of the engine bay?


    --

    fritz


    Re: 991 engine overheat

    I did get some steam and loss of fluid. (the M25 motorway has no hard shoulder where it happened so it was horrid to watch the gauge creep up but I had not other option) It's been checked and double checked with thankfully no adverse problems.

    As an aside, I was surprised how busy the OPC was - not just Macan interest either!


    --

    991 (what a car!) XC90 - 120 Cab - 2 kids, 1 dog


    Re: 991 engine overheat

    bridggar:

    I did get some steam and loss of fluid. (the M25 motorway has no hard shoulder where it happened so it was horrid to watch the gauge creep up but I had not other option) It's been checked and double checked with thankfully no adverse problems.

    As an aside, I was surprised how busy the OPC was - not just Macan interest either!

    Best thing to do in that situation is to turn as many electrical consumers off as you can and also the aircon (to reduce engine load) and turn the heater up to maximum with full fan to help dissipate heat from the engine.


    --

     

    Porsche 997 Carrera S PDK Aqua Blue / Black - Skoda Octavia Mk.3 daily drive


    Re: 991 engine overheat

    I did that - boy was it hot in the car!!!


    --

    991 (what a car!) XC90 - 120 Cab - 2 kids, 1 dog


    Re: 991 engine overheat

    bridggar:

    I did that - boy was it hot in the car!!!

    it's the latest Porsche option - onboard sauna Smiley


    --

     

    Porsche 997 Carrera S PDK Aqua Blue / Black - Skoda Octavia Mk.3 daily drive


    Re: 991 engine overheat

    Reminds me of about 3.5 decades ago while I was a passenger in a 6 cylinder truck that was towing a boat in the summer time. When the engine began to overheat, the driver cranked up maximum heat for the passenger compartment (we did "roll"/ crank down both windows). It seemed so logical and yet still not comfortable!

     


    Re: 991 engine overheat

    Gladstone:

    Reminds me of about 3.5 decades ago while I was a passenger in a 6 cylinder truck that was towing a boat in the summer time. When the engine began to overheat, the driver cranked up maximum heat for the passenger compartment (we did "roll"/ crank down both windows). It seemed so logical and yet still not comfortable!

    I once drove all the way from eastern Ohio to just past New Haven Connecticut in the middle of a hot August night (so nothing was open) with a radiator blockage that caused the car to overheat. Heater on full blast the whole way, except for New Jersey, which was mostly downhill to the George Washington Bridge, after which is was back to sweating the rest of the way. Ah, those reckless days of youth...


     
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