[jivenene]

Originally Posted by makke

Duh... Never mind. Efthreeoh answers my question in his DIY. 228-01 (64219178427) Heater Supply Hose is the one I was looking for. Sure was not obvious from the diagrams..., at least to me.

Thank you, Efthreeoh!

I know this post is old, but I'm about to unplug this hose (64219178427 heater core supply) to change out the upper radiator hose, and i want to have an oring handy in case the old one is broken. Is it the same size as the oring for the :

Hose, radiator transmission oil cooler 1 17117524710

which has the PN 17111711987 and is 14.5 x 2.5 mm in dimension? (also used at the trans oil cooler at coolant inlet / outlet).

thanks in advance!

[jivenene]

Originally Posted by jivenene

I know this post is old, but I'm about to unplug this hose (64219178427 heater core supply) to change out the upper radiator hose, and i want to have an oring handy in case the old one is broken. Is it the same size as the oring for the :

Hose, radiator transmission oil cooler 1 17117524710

which has the PN 17111711987 and is 14.5 x 2.5 mm in dimension? (also used at the trans oil cooler at coolant inlet / outlet).

thanks in advance!

Well I changed out the cracked and rotting radiator and top hose, and also replaced that oring i mentioned above. Luckily I had a assortment of orings from a AC repair kit (hopefully the green ones will work fine). As far as I could tell, the dimensions are 21mm ID (could have been 20.5mm, was hard to tell without my calipers to measure, only had a ruler) and 3.5mm thickness. Good luck to the next guy or gal!

As a caution, the coolant reservoir return line cracked and I had to make a run to the store. Ended up using 5/16" steel brake line that I cut and knurled at the ends and attached with standard 5/16" hose clamps. So far so good!

The cooling system on these cars are a great example of the importance of preventative maintenance. Had I not addressed this, there would have been a massive explosive failure which would have left me stranded for sure.

[Casca]

I don't know how it came up, but got videos about this fitting and how the OEM part deteriorates and will fail. So I decided to change that fitting without changing the hose and ordered a no-name brand aluminum fitting for @$24 shipped. Honestly, doing it that way looked sketchy. So I decided I should replace the whole fitting/hose with the same plastic OEM fitting and then put the aluminum fitting on the old hose as a back up part, which I was thinking I probably will never use because 150k+ miles... than I read OP's mileage...whoa!

Anyway I found an aluminum fitting with hose for $28 before tax/shipping made by Rein.

https://www.rockauto.com/en/parts/re...e+/+pipe,10068

Seems the best route to take for this instead of getting another plastic fitting/hose or stand alone aluminum fitting, cracking the old plastic one risking getting crap into your motor and then cutting out the clamp risking cutting the hose.

[Efthreeoh]

Originally Posted by Casca

I don't know how it came up, but got videos about this fitting and how the OEM part deteriorates and will fail. So I decided to change that fitting without changing the hose and ordered a no-name brand aluminum fitting for @$24 shipped. Honestly, doing it that way looked sketchy. So I decided I should replace the whole fitting/hose with the same plastic OEM fitting and then put the aluminum fitting on the old hose as a back up part, which I was thinking I probably will never use because 150k+ miles... than I read OP's mileage...whoa!

Anyway I found an aluminum fitting with hose for $28 before tax/shipping made by Rein.

https://www.rockauto.com/en/parts/re...e+/+pipe,10068

Seems the best route to take for this instead of getting another plastic fitting/hose or stand alone aluminum fitting, cracking the old plastic one risking getting crap into your motor and then cutting out the clamp risking cutting the hose.

Look for my DIY on replacing the flange. I solve that issue for you.

[peafarmer]

Hi, guys. I just replaced the radiator, and upper / lower hoses on my daughter's BMW 328i. Now the Heater hose 64219178427 228-01 - Heater Core Lower Hose is leaking. Did anybody ever find a part number for the o-ring in that hose connector?

I see that replacement hoses are easily found in case I need to replace the hose. Looking at the DIY it talks about removing the fuel / brake hose guard from below. Could I get a bit more detail on that? I don't know exactly where that is, and don't want to remove the wrong thing. Thanks! Andy

[335i54n]

I would just replace that hose since its on the hot side of coolant flow the plastic degrades faster.

[peafarmer]

OK, thanks. We found an o-ring in a kit from the local auto store that fit (hard to believe) to get us by, but the new hose is on order.

[aslctt]

Originally Posted by peafarmer

OK, thanks. We found an o-ring in a kit from the local auto store that fit (hard to believe) to get us by, but the new hose is on order.

Hi Peafarmer, I'm having the same leak issue. I've tried reseating the hose which helped a little but would like to try replacing the o-ring. Can you provide more info / details on the o-ring and/or kit that you used?

Thanks!

[watchout-everyone]

Hello everyone,

I am looking to either purchase a o-ring for a hose that's been leaking.

I took out the o-ring and physically measured it using a ruler at every angle. The measure was following.

OD: 29mm
ID: 19mm
Width: 4mm

I tried to find an exact size but there was nothing available but i did find one at 29mm 21mm 14mm.

Could someone please confirm if 21MM (ID) is the correct o-ring size for heater radiator hose? I think the one listed for 21mm (ID) make sense assuming the existing one must have contracted due to hot coolant water but i am just pulling out of my behind tbh.

Is 21mm (ID) the correct size for the o-ring at the heater radiator hose? I worry if the o-ring is a custom size which would require me to buy the hose itself.

View post on imgur.com

[sabino56]

When I had to replace an o-ring I couldn’t find info on size. I took the old out and went to ACE and bought a range of sizes around the old one and selected the one which seemed tight/best fit

[watchout-everyone]

Originally Posted by sabino56

When I had to replace an o-ring I couldn’t find info on size. I took the old out and went to ACE and bought a range of sizes around the old one and selected the one which seemed tight/best fit

Thank you. I just ordered 29mm (OD) 21mm (ID) 4mm yesterday and will later confirm if that one fits. If not, go to Ace Hardware later tonight.

I bought a o-ring assortment kit last week but unfortunately this heat radiator hose is noticeably bigger in width + length

[DJMATTB2005]

Originally Posted by watchout-everyone

Thank you. I just ordered 29mm (OD) 21mm (ID) 4mm yesterday and will later confirm if that one fits. If not, go to Ace Hardware later tonight.

I bought a o-ring assortment kit last week but unfortunately this heat radiator hose is noticeably bigger in width + length

Hi, i was just replacing the upper radiator hose and wanted to see if 1 is there an o-ring that connects to the inside of the heater hose? and 2 did this size work for you? thank you

[watchout-everyone]

Originally Posted by DJMATTB2005

Hi, i was just replacing the upper radiator hose and wanted to see if 1 is there an o-ring that connects to the inside of the heater hose? and 2 did this size work for you? thank you

Hi, sorry for late response. I haven't checked the forum in awhile

There is a o-ring inside the heater hose and it "kinda" worked for me. The leaking is noticeably reduced but not entirely. However, I think this is because my heater hose itself is old given I replaced the upper radiator hose just few months ago).

The size of the old existing o-ring looked different when I compared with new ones that are similiar in size. I could tell its size changed because i couldn't find a o-ring that matched that old one's size at all.

[armenh7]

Do yourselves a favor...
URO 3B0122291B (This is a Volkswagen part). Alternatively, DORMAN 627002.
Purchase for very cheap and either extract the o-ring and reuse or replace the entire fitting on the hose. I opted for the extraction option and it worked perfectly.