DIY Coolant change

[6MT_Addict]

FWIW, on the N54/55, my E90 service manual indicates to disconnect the radiator hose from the thermostat housing in addition to draining the rad via the Petcock.

Presumably this is to drain the block.

Appears to be the connection at PN 11 to the Thermostat. The under car shot is taken looking towards the rear - you can see the intercooler in the top right.

[cjquispe18]

now mi waterpump i gone and i replacement but i live in Peru south america i want to use the motul coolant or is neccesary use the bmw coolant.

Regards

[6MT_Addict]

Originally Posted by cjquispe18

now mi waterpump i gone and i replacement but i live in Peru south america i want to use the motul coolant or is neccesary use the bmw coolant.

Regards

Use BMW coolant, it's not expensive.

[Dackelone]

Cross posting this Coolant DIY...


DIY: e92 335i Radiator Flush
http://www.e90post.com/forums/showthread.php?t=551742

[Iron Man]

Originally Posted by bmw1racer

Changed the coolant today (N52 engine) per the OP's procedure.

The bleed cycle ran for 15 minutes.

It took more time to remove/replace the belly pan than for the coolant change itself.

BTW, what's the shelf life (if any) of the coolant? I overestimated and bought two gallons of BMW coolant instead of just one.

I would think an un-opened bottle of coolant could last for years in storage. Try to store in a climate controlled location.

[bmw1racer]

Originally Posted by Iron Man

Try to store in a climate controlled location.

Then that wouldn't be my garage.

Guess I'll have to keep it in the house somewhere... Maybe in the living room as a conversation piece?

[ShocknAwe]

Originally Posted by bmw1racer

BTW, what's the shelf life (if any) of the coolant? I overestimated and bought two gallons of BMW coolant instead of just one.

It doesn't say on the bottle?

[Iron Man]

Originally Posted by ShocknAwe

It doesn't say on the bottle?

Found these on the net FWIW. It sounds like un-opened it will last a long time.

https://www.bobistheoilguy.com/forum...Number=1468184


http://www.doityourself.com/stry/how...car-antifreeze

[Converted1]

Thanks for the tutorial. Thought I’d add that for a N54 the intercooler must be lowered on the drivers side to access the bleeder plug.

[BlueH2O]

Sounds like a pain arse to change fluid for N55 by moving the intercooler to access rad drain plug.
Can you just disconnect the return line to the reservoir/fill tank and do 2-3 electronic bleeds while filling the reservoir tank with new coolant?