[olivercox1983]

How long should it normally take for a diesel bmw to warm up? my 3 series will take about 25-30 mins to just get past the blue mark! is this normal? and my 5 series diesel seems to take about 15-20 to get to the middle of the gauge,
does it look like i need a new thermo?
cheers
ollie

 

[h60vy]

you need new thermostat mine takes about 5 mins

 

[olivercox1983]

thought it was the case, is it a hard swap?

 

[h60vy]

not really but make sure you bleed it properly otherwise you get air locks theres a diy on this forum if you look