C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Fire in back of engine

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Old Nov 28, 2023 | 12:51 PM
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2005 C230 Kompressor Sedan, 2003 CLK55 AMG, 2021 GLC300
Fire in back of engine

Had a small coolant leak going on the M271 2005 I had already replaced all known suspects. So I went straight to oil cooler replaced the oil cooler and gasket still had a tiny leak somewhere....

After further investigation it was that damn Coolant Pipe coming from the back of head. What was really strange not only was the o-ring severely worn the other half the plastic was burnt off...

I thought nothing off it replaced it drove it for a day and started smelling burnt plastic... was looking around saw that the back of cylinder head had this white soot everywhere and the same piece I just replaced had burnt off as well... How can this happen? Seriously confused I don't want to replace it again for the same thing to happen!

Photo of the original piece for visual aid.



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Old Nov 30, 2023 | 01:44 AM
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2003 C230K Coupe Orion Blue
Are you using an OEM pipe?
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Old Nov 30, 2023 | 11:39 AM
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It was Rein but that wasn't the root problem.

The battery cable runs right underneath it and it some point the sheathing tore ( most likey a rat ) after I pulled the whole cable out I was able to see that it was damaged coming into contact with something metal cylinder head or the bracket causing this issue and other electronic issues as well.


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Old Nov 30, 2023 | 11:44 AM
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Oh wow. Good thing it didn’t light up the rest of the car.

Just be glad our cars don’t use soy based wiring. The damage could’ve been much worse.
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Old Nov 30, 2023 | 12:20 PM
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Very lucky could've been way worse! I'm hoping total damage is going to be under $400 new battery and other misc. parts etc...
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