C63 AMG Oil Cooler solution! Reasonable 44O option!
@SRG_C63
It doesn't need much. Just something a little larger should do the trick.
The Best of Mercedes & AMG




Thanks, I also got some help from @sickSVT with his setup but he uses the setrab cooler below which I think I checked was the same of similar size to yours.
https://www.merlinmotorsport.co.uk/p...-female-std625
I just need to buy it all as some parts are from the UK and others I have to get from the US. I was waiting to see if @SRG_C63 trans cooler placement was and what needed to be done to the washer bottle as we need that here in the UK 😄 Then it’s a matter of finding a shop that does this type of work which is hard to find someone who can do custom stuff, thats worked on Mercedes & that is familiar with trans coolers. I think I have found one shop but it’s a 4 hour round trip.




https://www.merlinmotorsport.co.uk/p...-female-std625
I just need to buy it all as some parts are from the UK and others I have to get from the US. I was waiting to see if @SRG_C63 trans cooler placement was and what needed to be done to the washer bottle as we need that here in the UK 😄 Then it’s a matter of finding a shop that does this type of work which is hard to find someone who can do custom stuff, thats worked on Mercedes & that is familiar with trans coolers. I think I have found one shop but it’s a 4 hour round trip.
Oliver Stoner is a very knowledgeable guy and I can vouch for him
Oliver Stoner is a very knowledgeable guy and I can vouch for him
I wanted to quickly relay my experience with Sven!
I have a 2012 C63 Coupe with 42k miles. I've owned the car for about 1.5 years and drive it sporadically in the canyons in and around Los Angeles. Under a load, it was not uncommon to go into limp mode and see oil temps at or above 276F. Obviously this was super alarming. Pretty much the only place I could enjoy my car was Angeles Crest, at night, in the winter (temps would still hit 260F sometimes).
I contacted Sven in December and ordered his oil cooler hoping to rectify the issue. After a very easy transaction, fabrication began and just over a month later I had my cooler in hand. My shop installed it in a couple of hours and relayed they were very impressed with the size, design, and ease of install.
It obviously isn't summer yet, but the effectiveness of the cooler is clear. I would guess my highway temps (in manual mode, with some aggression) do not break 239/240F. Previously, this would be around 260F.
I did a drive with several Porsche friends to Death Valley last weekend. Under these conditions (flat road, 72F ambient temp, manual mode, speed about 90-100mpg consistently) we did not break 239F.
I cannot wait to get it in the canyons this summer. All signs points to success.
Also, temps return to normal far, far quicker than the standard cooler.
BIG IMPROVEMENT!
thank you Sven
You don't need to remove any radiators. The car has no problems with the water temperature or with the functioning of the air conditioning. This is a waste of time.
The FMU cooler is simply much too thick. The best cooler is as thin as possible and as high and wide as possible.
However, since this is not possible in modern cars, the radiators have to be a thicker and smaller. Any cooler thicker than 50mm will not work efficiently. I got this statement from the radiator manufacturer.
Additionally it could be that the cooling cores from the FMU cooler were of bad quality. But I am not sure about that.
If I had built the cooler like on the pictures, it would have cost much more.
Compared to the 44O kit, my radiator has the same cooling surface in combination with the original wheel arch cooler.
What you could do additionally is to install the SLS wheel arch cooler. This fits plug and play and costs about 1500$ in addition to my front radiator.
Then you have the largest cooling surface you can get on this car without major modifications and a better self made 44O Kit.
If I look at the part numbers from the 44O pdf this is what I see below but unsure what I need/dont need. I think the hardest part might be the actual oil lines as they won’t work with your cooler because of the mounting position.
A1975001600 - Cooler
A2045004000 - Holder bottom
A2045004100 - Holder top
A2045005500 - Holder left
A2045005600 - Holder right
A2315040112 - Rubber bearing x4
A2045005400 - Airguide rear
A2045050100 - Sealing Strip
N910112006003 - Screws x4
A2045003900 - Airguide front
A2045230000 - Strut
A0019902356 - Clip nut x2
A1685452328 - Seal
A0005456280 - Plug
A2048800700 - Wheel Arch Panel
Last edited by Phil_T; May 25, 2024 at 01:13 AM.
also looking into the SLS fender cooler it looks like the in and out ports are different then the one in the car right now, but online parts catalog seems to say it will fit a c63. Has anybody actually upgraded the the SLS fender cooler?




The standard ducting isn't as good as that of the 440 oil cooler package from AMG but does still have some ducting effect.
I also opened up the holes in the undertray behind the new cooler and included a rubber drop spoiler in front of the holes (similar to the 440 Pkg) to create a low pressure area behind to help suck air out from behind the cooler.
The standard ducting isn't as good as that of the 440 oil cooler package from AMG but does still have some ducting effect.
I also opened up the holes in the undertray behind the new cooler and included a rubber drop spoiler in front of the holes (similar to the 440 Pkg) to create a low pressure area behind to help suck air out from behind the cooler.
What I have been looking at since it looks like the SLS cooler is not a direct swap is at least maybe trying to use the front and rear ducting from the 44O kit. The front might work possibly, but the rear there are no studs on the back side of the factory wheel arch cooler, so I guess that wont work.






