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Discussion Starter · #1 ·
I replaced my 2000 E39 M5 thermostat housing o-rings last night and recorded the process in case it helps folks.
Member Timmay77 posted a great tutorial here,
so this video might be considered an attempted supplement.


The process seems to be similar between the S62 implementation in the E39 M5 and the E52 Z8.
This clip doesn't show me putting the new thermostat into the housing, but this should be straightforward
once the housing is out as demonstrated in this video. Parts and tools required listed below.

Parts I used:

• Two - 11 53 1 407 002 - O-Rings (for Pipe to Oil Cooler and Thermostat Housing)
• Four - 11 53 1 406 249 - O-Rings (for Water Pipe to Water Pump (31 X 2.5 mm))
• One 11 53 7 835 558 - BMW Thermostat (M5) - I used a Behr (OEM)

(I used FCP Euro for these.)


Tools I used:

  • 10mm socket
  • 14mm socket
  • 17mm socket
  • Flat head screwdriver
  • Channel-lock pliers
  • Rags to stop/slow coolant flow
  • Coolant removal pump system
  • Clean coolant storage containers (I use old distilled water jugs)
  • Nice to have: A wobble extension for your sockets
  • Might need: A file to smooth any damage to aluminum pipes

Regarding GoPro camera alignment: Next project I'll get better light, tilt down, and attempt to zoom
in closer. So this is best if viewed full screen. This job took about 60 minutes start to finish. I hope this video helps.

-Michael
 

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Nice. Now when the time comes to replace mine it'll be easy peasy.
 
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