Quote:
Originally Posted by Len_Beach
I had a looked yesterday and topped up with half a litre.
I found two processes for bleeding the system, one was in relation to an electric water pump which ISTA suggested the N57 has however I couldn't get it to work. The other was a manual process, open the bleed screw, remove expansion tank cap, idle for 5 minutes, replace cap, rev to 3k a number of times then idle for a further 5 minutes.
I didn't add any further coolant after this although I've driven from Leeds to Swindon this morning so I'll check the level when I get back to the hotel tonight as that should have pushed through any air bubbles.
It's well worth changing the coolant if you're doing the box. If you haven't already, change the diff oil as well as that made a massive difference on mine.
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FYI, out of interest I tried the bleed procedure today I also couldn't get it to work. Looks like it is not for the N57 engine.