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W211 AMG Discuss the W211 AMG's such as the E55 and the E63

can't find the coolant leak

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Old Oct 25, 2015 | 09:23 PM
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jimmypAMG's Avatar
jimmypAMG
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2006 E55 AMG
can't find the coolant leak
Came home today to see my W211 E55 in the driveway with a river if coolant underneath it. Took the skid plate off and there was a good liter or 2 of coolant on the ground and in the skid plate. Only thing is I can't find the source of the leak. It's on the drivers side somewhere because coolant has pooled up on the drivers side lower radiator support where the radiator sits, also there are a couple hoses with coolant on them but they are not coolant hoses (power steering cooler line and trans cooler line) and there all the clamps and ends of coolant hoses seem to be dry. Any ideas?
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Old Oct 25, 2015 | 10:48 PM
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2004 E55.98 SS Camaro.Jetta TDI. Expedition
Have you looked while it was running or after its warmed up and u shut it down?
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Old Oct 25, 2015 | 11:29 PM
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E55
most likely the radiator is leaking at the side of it. a pressure tester would be the best way to find it or just run the car and see if you can see a leak.
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Old Oct 26, 2015 | 02:18 AM
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Mercedes CLS 55 AMG
Check the small expansion line running from the reservoir to the engine Y pipe.
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Old Oct 26, 2015 | 08:28 AM
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2006 E55 AMG
Resivoir line is fine. My best guess is the radiator. Going to pressure test today.
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Old Apr 21, 2016 | 07:12 PM
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04 E55/04 SL55/R35 GTR
Any update on where the leak was coming from?
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Old Apr 21, 2016 | 09:39 PM
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Probably leaking on the sides near air scoops, where the plastic meets the metal from the radiator. That's where most leaks happen. Also check the hose on the passenger side
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Old Apr 21, 2016 | 11:52 PM
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04 E55/04 SL55/R35 GTR
Originally Posted by Hulk
Probably leaking on the sides near air scoops, where the plastic meets the metal from the radiator. That's where most leaks happen. Also check the hose on the passenger side

That where mine might be leaking, the steam comes out of the driver side scoop. So are you saying it's probably the radiator itself?
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Old Apr 22, 2016 | 07:26 AM
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If its not the hose of the passenger side being loose and leaking then it's the radiator. When you do the pressure test make sure the reservoir is almost full and you will see the leak
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Old Apr 22, 2016 | 07:38 AM
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Check your driver side intake tube. My radiator separated at the end tank and was spraying into the intake tube. It should be pretty obviously once it dries
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Old Apr 22, 2016 | 09:36 AM
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Originally Posted by 2000UZJ
Check your driver side intake tube. My radiator separated at the end tank and was spraying into the intake tube. It should be pretty obviously once it dries
Mine did this too
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Old Apr 22, 2016 | 09:59 AM
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04 E55/04 SL55/R35 GTR
Originally Posted by BagMan
Mine did this too
Originally Posted by 2000UZJ
Check your driver side intake tube. My radiator separated at the end tank and was spraying into the intake tube. It should be pretty obviously once it dries
Originally Posted by Hulk
If its not the hose of the passenger side being loose and leaking then it's the radiator. When you do the pressure test make sure the reservoir is almost full and you will see the leak
Yeah it's definitely coming from the driver side intake scoop and the steam when I come to a stop, is coming directly right out of the intake scoop opening. OK I will run a pressure test and let you guys know what I find. If it is the radiator as suggested is there an upgrade worth getting or just go with OE replacement?
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Old Apr 22, 2016 | 01:00 PM
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No upgrade ... When you do the pressure test your will see the water/coolant spray right out between the plastic and metal
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