Lower radiator hose

Tiny
KEVINM01
  • MEMBER
  • 2003 MERCEDES BENZ C230
  • 1.8L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
So my lower radiator hose broke on car.
What are the steps to replace the hose? It has some weird connections. It is not just regular clamps.
Saturday, November 18th, 2017 AT 3:26 AM

4 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The hose is plugged in and held in position by a locking clip. Use a screw driver to pry the clip outwards until it is unseated from position and clicks into its unlocked position. The clip should stay on the hose end. Twist the hose until it is loose and it should come off. Inside the hose is an 'O' ring. Lubricate it with a little rubber grease before installing. For new hose, do not pull the clip out. Just plug into the radiator and thermostat outlet until you hear the clip clicks. Tug at hose to ensure that is is locked, failing which the hose would detach itself when pressure builds up as coolant heats up.
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Saturday, November 18th, 2017 AT 6:56 AM
Tiny
KEVINM01
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  • 63 POSTS
Okay, how do I reach the lower radiator connection? I do not have a jack nearby me. Can I reach it from below the car while the car is on the ground? Or, is there a way I can access from up top?
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Saturday, November 18th, 2017 AT 9:07 AM
Tiny
KEVINM01
  • MEMBER
  • 63 POSTS
Additionally, I am looking at the new part and the ends of the hose (the quick connect ends) are lacking the clip. So how should if I have to reuse the old clip, how do I orient it?
Do you know how long this job should take?
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Saturday, November 18th, 2017 AT 9:10 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Accessing from top is possible but the space is quite cramped. If there is anything that is preventing easy access, they should be removed.
The hose should come with the clip in its locked position. If it is not there, you would need to reuse the old one. The clip comes easily when pried off.

Normally such jobs are rather easy to remove and replace, less than one hour but after replacing, you would need a little time to monitor if there are any leaks.
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Sunday, November 19th, 2017 AT 9:47 PM

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