Oil overheat limp mode
06-17-2015, 12:03 AM
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Oil overheat limp mode
UGH! just finished a track day, car is great except the oil cooling. 13 minutes in and the oil goes to 278 F and then into limp mode. Its a 2014 c63 amg sedan. I read there is a fix for this. on normal daily driving it runs about 220 to 230 but as soon as I get some time on the track it shoots up to 270 pretty fast , then I have to pull off at 278 on theoil because Ill be in limp mode after. the engine coolent is fine its temps are good with the oil temp is way up. I read there is a amg code 440 to fix this. but has anyone done it here in the states. I didnt pay this much money to only drive ont he street. heck it has "race start" and such and people in germany drive like crazy, so whats up.
06-17-2015, 12:31 AM
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
06-17-2015, 12:49 AM
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06-17-2015, 12:56 AM
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06-17-2015, 01:11 AM
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I saw that ' but seems nobody knows pricing . I guess I'll call dealer tomorrow and ask. But then again If royal purple helps then that's cheaper ' but we will see who chimes in here.
06-17-2015, 01:25 AM
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It's reducilus to believe that as much as these cars are and for what we buy them for ' we can't go do a track day for a couple sessions without it getting oil overheated . I mean it has huge brakes for a reason and and huge motor . We don't buy for looks. Well ' some do ' but dang
06-17-2015, 01:41 AM
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Has anyone purchased the 440 package and successfully adapted it to Pre FL C63? Maybe I should ask has anyone acquired and installed the 440 at this point?
06-17-2015, 02:03 AM
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Changing to Royal Purple was not the point of the above post (I don't even think it is an approved oil - stick with M1 0W-40). The radiator blockoff plate was. It prevents limp mode. I've had 3 trackdays this year without coming close to limp mode because of the blockoff plate. Make one.
06-17-2015, 05:02 AM
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06-17-2015, 05:23 PM
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Wobble64 has it on his car and I just ordered mine. See the two PDF attachments here. IIRC the cost of the package is about $2K US stateside (and about $3K CAD here) plus labour for the installation. It's the only approved fix that won't void the warranty on the car.
There are two threads on it on the AMG PL if you are a member.
Stay away form Royal Purple (and preferrably stick to M1 0W-40 as someone else suggested - you'll burn off three times as much oil on start-up, but it is IMHO the best all-around oil for the car, especially if you both track it and drive it on the street).
There are two threads on it on the AMG PL if you are a member.
Stay away form Royal Purple (and preferrably stick to M1 0W-40 as someone else suggested - you'll burn off three times as much oil on start-up, but it is IMHO the best all-around oil for the car, especially if you both track it and drive it on the street).
06-17-2015, 05:33 PM
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It specifically addresses the oil overheating issue resulting from the traction control slipping the oil-immersed clutch on the FL MCT cars and overheating the oil. The pre-FL cars use a torque converter instead of the wet clutch and thus do not suffer from that particular issue, and furthermore generally do not tend to overheat even when tracked hard. If yours does I'd be looking for other possible culprits.
06-17-2015, 07:09 PM
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It specifically addresses the oil overheating issue resulting from the traction control slipping the oil-immersed clutch on the FL MCT cars and overheating the oil. The pre-FL cars use a torque converter instead of the wet clutch and thus do not suffer from that particular issue, and furthermore generally do not tend to overheat even when tracked hard. If yours does I'd be looking for other possible culprits.
06-18-2015, 01:36 AM
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It specifically addresses the oil overheating issue resulting from the traction control slipping the oil-immersed clutch on the FL MCT cars and overheating the oil. The pre-FL cars use a torque converter instead of the wet clutch and thus do not suffer from that particular issue, and furthermore generally do not tend to overheat even when tracked hard. If yours does I'd be looking for other possible culprits.
06-18-2015, 12:58 PM
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That's a very good and logical question, but unfortunately I don't know how the two are exactly related although they certainly seem to be as both the oil and tranny cooler are replaced in the kit. The following was the answer to the same question from an AMG official on the AMG PL:
I do not believe engine oil temp will trigger limp mode
Only tranny temp
Can someone from AMG confirm this?
Thanks
andOnly tranny temp
Can someone from AMG confirm this?
Thanks
both can...
trans temp will default into comfort mode with no paddle shifting and slow operation...then if you keep pushing, it will eventually go into full limp which i think is just 4th gear
oil temp will put the engine into limp home with reduced power and operation
trans temp will default into comfort mode with no paddle shifting and slow operation...then if you keep pushing, it will eventually go into full limp which i think is just 4th gear
oil temp will put the engine into limp home with reduced power and operation
Pre 2012 do not suffer from this issue
The 2012+ have a wet pack clutch
The earlier cars have a conventional torque convertor
The wet pack can be damaged by high temps
It is a clutch pack with multiple organic friction discs, like brake material or a conventional friction type clutch, that transmit the power
It is also modulated on/off during shifting adding thermal load
It's how they get the double declutch
The TC cannot be damaged
It is steel and remains locked once rolling
No organic discs that transmit power
So the cars with the wet pack have protective software to impose limp mode upon high tranny temps
They offer the cooling package the dissapate more heat, ie, keep the fuild cooler
The pre 2012 do not require this safety software
The second query and reply indicate that the MCT slippage is in fact directly heating up the transmission fluid, not engine oil - so why the engine oil temperature shoots up on the MCT cars more than the pre-FL cars is still somewhat unclear. My suspicion is that it's because of the higher engine revs associated with the more aggressive shifting patterns (the throttle blips) with the MCT that cause the additional increase in engine oil temperature. An easy way to find out would be to gently accelerate and keep the transmission in, say, 1st or 2nd gear only with the engine revs around 5000 rpm or so for a couple of minutes with no shifting at all (so well within the posed speed limits on a city street) and see what the engine oil temp does...
The 2012+ have a wet pack clutch
The earlier cars have a conventional torque convertor
The wet pack can be damaged by high temps
It is a clutch pack with multiple organic friction discs, like brake material or a conventional friction type clutch, that transmit the power
It is also modulated on/off during shifting adding thermal load
It's how they get the double declutch
The TC cannot be damaged
It is steel and remains locked once rolling
No organic discs that transmit power
So the cars with the wet pack have protective software to impose limp mode upon high tranny temps
They offer the cooling package the dissapate more heat, ie, keep the fuild cooler
The pre 2012 do not require this safety software
one other aspect that can exacerbate higher trans fluid temps is that ESP will open/slip the MCT clutch while keeping the RPM up so that the ESP correction does not ruin the corner or line (by just killing fuel delivery)...the issue is that this is very seamless and if you are not the most experienced driver you will not notice that this is happening (and don't see the blinking yellow triangle and keep driving hard, which continues to load up the heat...
06-18-2015, 01:04 PM
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And another one from the same thread on PL:
Does the engine oil limp mode happen on TC cars?
Do you know at what oil temp it triggers?
Do you know at what oil temp it triggers?
if you try hard enough you can do it to just about any car as they all have some kind of temperature protection for various fluids...but typically no...
not sure of what the max temp spec is either
not sure of what the max temp spec is either
