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E39 M5 (1998-2003)

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Old 06-30-2020, 07:05 AM
znabil85 znabil85 is offline
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Location: Austin
Join Date: Oct 2009
Posts: 91
Mein Auto: 14 M5 Comp Pack
Smile DIY: Thermostat replacement in details

Hey guys,

This forum seems very slow but FWIW I made a video replacing the thermostat a while ago and figured I would post it. Hope it helps someone! It wasn't as bad as it sounds... Just get the thermostat housing cover and save yourself the hassle of pulling the old gasket etc... It was like $71 from FCP at the time.

I used pressure test kit which is a must for this DIY because as expected, I had a massive leak when I put the parts back together... Imagine doing all this work only for it to leak coolant the moment you crank the engine. You can rent the tool from many places... They're all essentially the same but just double check the kit has a fitting that works on your expansion tank before you start the repair.

Good luck!

2014 F10 M5 Competition Package.
2018 F90 M5 - (Very noisy and seats are hard AF) Traded for F10 M5 Comp Pack.
2018 M550i - Traded for F90 M5.
03 M5 black on black - Sold.
2007 530iA - Traded for M5.
2003 530iA MSport - Totaled by a semi.
2001 525iA - Overheated
1997 528i 5 speed manual - Sold.
1984 318i Coupe 5 speed manual - Totaled.

Other Cars I've Had:
2002 Mazda Millenia.
1995 Toyota Camry Coupe 5 speed manual.
1993 Ford Probe.
1990 Chevy Safari.
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