Quote:
Originally Posted by 0w40X1
One thing not discussed is don't use ECO-PRO.
It runs up temps of coolant to 236 deg f instead of my normal of 215 deg f.
I wouldn't use ASS either.
Each time car is started the chain is jerked, and hotter plastic will get brittle quicker.
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I don't know how ECO-PRO's thermostat threshold would cause failure to the timing chain guide. All it does is not open the t-stat until that temp in order for the engine to reach operational temp quicker so that it is not in closed loop too long. It's for emissions purposes.
Constant stop and start operations via ASS do accelerate wear on the chain/guide. Best preventative is to switch off ASS and change oil well ahead of BMW's OCI.