The expansion tank problem - does it also apply to ZHPs?

[tripod06]

what is the "updated" tank is it just the newer one that is made better?

[danewilson77]

what is the "updated" tank is it just the newer one that is made better?

I guess someone called Turner and questioned the "Updated tank". The guy at Turner was...like...well...it's better. I wanted to buy a new one....and compare it to an old one....after cutting them both in half.

[Marcus-SanDiego]

Turner says the new and improved expansion tank is part number 17137787039.

EDIT: AutohausAZ does not have that part.

[JohnnyGraphic]

Unless you overhaul and replace all of the problematic items with much better parts (water pump, thermostat, expansion tank and even the radiator), you will be faced with a preventative replacement of the cooling system every 60-90k miles. They do have aluminium radiators and steel (?) thermostats and better water pumps, but they're very cost prohibitive. Since the pulleys and belts are wear items anyway and you will need to do those items, why not just do the full cooling system overhaul including the coolant and be done with it. My expansion tank didn't show any bad signs at 60k. But, the water pump was definitely going. There is so much plastic in the engine bay, that there are a lot of things that will need to be replaced on a consistent basis.

My 2 cents.

Johnny

[danewilson77]

Unless you overhaul and replace all of the problematic items with much better parts (water pump, thermostat, expansion tank and even the radiator), you will be faced with a preventative replacement of the cooling system every 60-90k miles. They do have aluminium radiators and steel (?) thermostats and better water pumps, but they're very cost prohibitive. Since the pulleys and belts are wear items anyway and you will need to do those items, why not just do the full cooling system overhaul including the coolant and be done with it. My expansion tank didn't show any bad signs at 60k. But, the water pump was definitely going. There is so much plastic in the engine bay, that there are a lot of things that will need to be replaced on a consistent basis.

My 2 cents.

Johnny

Hoses?

[JohnnyGraphic]

Yeah, and hoses too!

Don't forget the occasional 0-ring and/or sensors too.

[Marcus-SanDiego]

Question: do we have a thread that names every part and part number required for coolant overhaul? If not, that would be quite useful.

[JohnnyGraphic]

IIRC, there are threads that list links to sponsors that do have a full cooling system overhaul kit though.

[danewilson77]

Question: do we have a thread that names every part and part number required for coolant overhaul? If not, that would be quite useful.

No...but this pretty much covers 2003 and > for 330........



http://www.ecstuning.com/BMW-E46-330...ling/ES263603/

[JohnnyGraphic]

Only option I would add is a brass bleeder screw. Cheap insurance.