Which heater core?!?

[aTron12]

I'm starting to smell coolant in my heat and the heater valve has already been replaced which leads to the heater core starting to die a slow death. I want to do this repair with part in hand so I am going to order it in advance. Only catch is that there are two different types to choose from. One is a plastic inlet and the other is aluminum. The attachments also look different.

Any idea what I should order for my 325is built in 12/88?

Also it is recommended to replace the radiator cap. Why? Is it because the system is more pressurized... and most likely this cap is 20+ years old and might not hold a good enough seal?

http://www.partsgeek.com/catalog/1989/bmw/325is/climate_control/heater_core.html

Thanks,

Adam

[jlevie]

The part you want should be 64118391363

[aTron12]

Thanks!

The part you want should be 64118391363

[reelizmpro]

You want that first Behr heater core unless you have a euro car without factory AC.