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Discussion Starter #1
Just discovered my daughter has been driving around without the coolant cap on for a week.:yikes:
I guess the cold weather and no traffic jam saved her butt.
But, I have to say these M52 engines are robust.
Wait for engine to cool down as we speak and will go through the bleeding procedure.
Late for work, :mad:
 

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They are. Especially the lower volume versions. The same engine, smaller holes, more metal to support the heat cycles. Best engine in terms of maintenance for the E39.
 

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The cap raises the cooling system pressure, thus increasing boiling temp.

Without the cap, as long as there is coolant circulating and there is no boiling of coolant, the engine will be fine.
 

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Discussion Starter #5
The cap raises the cooling system pressure, thus increasing boiling temp.

Without the cap, as long as there is coolant circulating and there is no boiling of coolant, the engine will be fine.

It doesn't have to boil before you will loose all your coolant. Once the coolant is loss here goes your engine.

The M52 engine is more susceptible to overheat.
 

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Discussion Starter #6
They are. Especially the lower volume versions. The same engine, smaller holes, more metal to support the heat cycles. Best engine in terms of maintenance for the E39.
Ah! Learn something every day. So your 520 is a 6 cylinders?
 
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