Cooling System Maintenance v8

[Hack213]

Originally Posted by Entropy

Here's what I would do while you're in there (and exactly what I did):



Water pump (recommend HEPU)
Thermostat
BimmerFix stent kit (very important)
Hoses
Coolant
Overflow tank
Belts (AC and serpentine)
Idler pulley and both tensioners


Also be prepared to do the oil thermostat gasket. Might as well do it while you have the belts off and radiator removed.

Thank you so much I'm gonna start getting these parts ! Also on the valley coolant pipe should I do it right away? ;( tough to ask I know!!

[Entropy]

Originally Posted by Hack213

Thank you so much I'm gonna start getting these parts ! Also on the valley coolant pipe should I do it right away? ;( tough to ask I know!!

With the BimmerFix stent kit, you don’t have to replace the coolant pipe that runs under the valley pan. You install the stent from the front where the water pump attaches. It essentially creates an additional seal that bridges where the coolant pipe attaches to the engine block on the front. It is always the front seal that leaks, and that’s what the BimmerFix stent kit repairs or prevents (if it hasn’t started leaking yet). There is a lot of info online, just search around. I did not use the bottle of leak-stop that comes with the kit.

I’ve been running the stent kit for 2 years and 30k miles. No issues, no leaks.