Author Topic: replacement coolant hose the easy way?  (Read 347 times)


  • Enthusiast
  • *
  • Posts: 68
  • W116 Enthusiast
  • Location: Schaffhausen / Switzerland
replacement coolant hose the easy way?
« on: 12 April 2021, 11:45 AM »
My upper coolant hose from the thermostat housing to the engine top leaks a bit when the engine is cold. Not much but too much to not worry
Anyone have an idea or experience how much coolant would rinse out if I remove the thermostat housing without prior coolant drainage?
I also think of sucking out as much fluid as possible through the thermostat thread with a vac pump and a hose and catch the residual with a cloth.

    thanks ahead

1976 Merc 6.9  since 2013
1974 Caddy CdV   since 1992  (for sale)


  • Vintage
  • ***
  • Posts: 790
  • Assimilated. Resistance is futile.
  • Location: Salt Lake City, Utah
Re: replacement coolant hose the easy way?
« Reply #1 on: 12 April 2021, 05:18 PM »
At some point I did exactly what you have in mind.  I figured it couldn't be all that much coolant.  After all, the thremostat is pretty high up.  It turned out to be a lot more than I anticipated.  Put a big tray underneath the car and be prepared for more of a mess than you'd expect.  Good luck and cheers,
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0