Interested in a 2005 C230 - but unsure if the 1.8L Kompressor engine life expectancy
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Joined: Sep 2011
Posts: 1,657
Likes: 35
From: Austin, TX
2005 C230K(sold), Mk7 Jetta
Top coolant pipe! you mean that plastic piece of sh.. err, plastic directly above the exhaust that cracks close to the engine connection and leaks coolant? I recently discovered that on mine, haven't replaced yet. Did you have problems disconnecting the rubber hoses at the back?
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Joined: Feb 2010
Posts: 250
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From: Miami, FL
2009 E63
Top coolant pipe! you mean that plastic piece of sh.. err, plastic directly above the exhaust that cracks close to the engine connection and leaks coolant? I recently discovered that on mine, haven't replaced yet. Did you have problems disconnecting the rubber hoses at the back?
After that just did my 50/50 mix of distilled water and coolant and added and bled the system. Finished off with cleaning the block and giving her a wash
The new pipe comes with a new temperature sensor and I believe that pipe that attaches to it that always breaks. I might have purchased that on my own though, don't recall.
Once done sit down and grab a cold one.
Edit: I just remembered that what leaks from the tube is actually the connection that goes to the block. There is an o-ring that just goes square. I remember pulling it out and saying I should have just gotten the o-ring and called it a day but it would have been more work going back and forth. I would buy both the tube and the o-ring and see if it's the o-ring that just needs replacement. Then return the tube if it's not needed.
Last edited by jpman; Aug 29, 2014 at 02:40 PM.
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Joined: Sep 2011
Posts: 1,657
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From: Austin, TX
2005 C230K(sold), Mk7 Jetta
Do you recall how much coolant you lost? Or did you drain it first?
I kinda don't want to drain it again since I just replaced it about a year ago.
My plan was to wait and observe that pipe. Then next year when I flush the coolant I will also replace the pipe (and the water pump which makes a slight metallic scratching sound - found that when changing the belt/pulleys).
I kinda don't want to drain it again since I just replaced it about a year ago.
My plan was to wait and observe that pipe. Then next year when I flush the coolant I will also replace the pipe (and the water pump which makes a slight metallic scratching sound - found that when changing the belt/pulleys).
Senior Member
Joined: Feb 2010
Posts: 250
Likes: 15
From: Miami, FL
2009 E63
Do you recall how much coolant you lost? Or did you drain it first?
I kinda don't want to drain it again since I just replaced it about a year ago.
My plan was to wait and observe that pipe. Then next year when I flush the coolant I will also replace the pipe (and the water pump which makes a slight metallic scratching sound - found that when changing the belt/pulleys).
I kinda don't want to drain it again since I just replaced it about a year ago.
My plan was to wait and observe that pipe. Then next year when I flush the coolant I will also replace the pipe (and the water pump which makes a slight metallic scratching sound - found that when changing the belt/pulleys).
I added something to my previous post, I believe that is usually the problem with that coolant pipe. The pipe itself was not brittle or leaking, it was just the o-ring that got squared off.
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,657
Likes: 35
From: Austin, TX
2005 C230K(sold), Mk7 Jetta
Hmm... that might be the case. When I look at mine, it seems that the coolant is slowly leaking from the plastic flange just a fraction of an inch from where it connects to the block. But it might well be getting past the o-ring and then travelling to the flange.
Now I just need to figure out what's the time frame for part returns at the dealer.
Need to give it at least a couple of weeks to see if replacing the o-ring solves the leak.
Thanks for the heads-up!
Now I just need to figure out what's the time frame for part returns at the dealer.
Need to give it at least a couple of weeks to see if replacing the o-ring solves the leak.
Thanks for the heads-up!
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Joined: Nov 2005
Posts: 452
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From: Tyler, TX
2025 Mazda CX70 Turbo S, 2015 G550
ooops i forgot, 2 sets of plugs 3 serp. belts, 3 coolant flushes, 3 tranny flushes, 4 brake flushes, and numerous filters....
I keep an eye on that plastic thing too and sofar no seepage. Mercedes did say they used a new coolant two months ago when I had mine changed. it's a different color too.
I keep an eye on that plastic thing too and sofar no seepage. Mercedes did say they used a new coolant two months ago when I had mine changed. it's a different color too.
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,657
Likes: 35
From: Austin, TX
2005 C230K(sold), Mk7 Jetta
Is it the 'new' blue coolant? Apparently it has the same MBZ approval numbers as the straw-colored one. I think they changed the color so that it's harder to spot the contamination...
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most likely just a coincidence though.
