Daniel G Posted January 21, 2019 Report Share Posted January 21, 2019 hi there. looking to change and expansion tank and upper and lower radiator hoses. do I have to order specific parts as far as ORings go or can I purchase a whole bunch from the auto store and use the correct size from that?? Quote Link to comment Share on other sites More sharing options...
kirkynut Posted February 23, 2019 Report Share Posted February 23, 2019 A late reply but the hoses have O rings built in and they are not replaceable. Kirkynut Quote Link to comment Share on other sites More sharing options...
De Sisti Posted February 25, 2019 Report Share Posted February 25, 2019 I had the expansion tank of my 2003 (117,000) E46 Touring changed (after reading a few scare stories about them failing. Garage said there was nothing wrong with it. There is a heated debate going on about the subject on E46 fanataics. Here's a taster: 01-12-2019, 04:52 PM #19 OnTheFence Registered User Join Date: Jan 2012 Location: NY Posts: 1,815 My Ride: 2001 330i (and 530i) View My Garage My e39 it's on the original expansion tank at 170k miles. Replace my E46 expansion tank at a 100k miles.. and it was perfect brand new looking.. waste of time and money Cooling system paranoid ...a lot of Internet forum hype craziness. If it ain't broke don't fix it and if you bust a pipe .pull over and get towed. big deal __________________ 0714,0171: It was the MAF. NOT intake boots. NOT vacuum lines. NOT Fuel pump Last edited by OnTheFence; 01-12-2019 at 04:52 PM. 01-13-2019, 11:08 AM #20 Ettinger Registered User Join Date: Dec 2018 Location: & Posts: 300 My Ride: 4 doors, 3 pedals View My Garage Quote: Originally Posted by OnTheFence My e39 it's on the original expansion tank at 170k miles. Replace my E46 expansion tank at a 100k miles.. and it was perfect brand new looking.. waste of time and money Cooling system paranoid ...a lot of Internet forum hype craziness. If it ain't broke don't fix it and if you bust a pipe .pull over and get towed. big deal Quote Link to comment Share on other sites More sharing options...
kirkynut Posted March 14, 2019 Report Share Posted March 14, 2019 Both radiators and expansion tanks split soon after 90k. I've been there twice now. Get the Hella branded ones from Eurocarparts. They are what BMW fitted in the factory, so are OE. Not expensive from there either. Don't just do one or the other. Do both at the same time. Kirkynut Quote Link to comment Share on other sites More sharing options...