Coolant hose

[Oscar50]

Hi, does anybody know the part number or where I can get a coolant hose, its the hose that sits lower left of radiator from front of vehicle and goes to front of engine (water pump)? It's seeping coolant from the collar. Have included a pic although not great!

 

[Oscar50]

Sorry just realised how bad the pics are, it also has a electrical plug in it at engine end.

 

[Oscar50]

2003 2.5i

 

[bigwinn]

I have one

However your issue is more likely to be the o ring failing in the pipe-

 

[colb]

https://www.realoem.com/bmw/enUS/showparts?id=BT32-EUR-07-2003-E85-BMW-Z4_25i&diagId=17_0249
Check for part number then ring Sophers BMW for a price. they will want your Vin number to check for right part if you buy from them be sure to ask for Forum discount. They will post items out to you.
Also run the part number trhrough ebay and Autodoc to see their prices.
Good call by enuff check trhe O ring in the hose fitting.

 

[Oscar50]

OK thank you , does a new hose come with the o ring as well? Or can I get o ring separately and try that first?

 

[bigwinn]

I think the last hose I bought from sopers was under £30 all in including o rings

 

[patriot66]

Are you sure it's not the green o-ring on the temperature sensor that's leaking ? Number 5 on the real.oem diagram. It's very common, mine has been replaced and many others on here. Coolant runs down along the bottom hose and can be misleading as to where it's coming from

 

[Oscar50]

It could well be you have described the symptoms spot on, I will have a look today, if it is where can I purchase an o ring? Many thanks

 

[bigwinn]

It could well be you have described the symptoms spot on, I will have a look today, if it is where can I purchase an o ring? Many thanks

The sensor comes with a new o ring and are only a few quid from the usual places like euro car parts

If you just want to change the o ring I think I bought a selection box of o rings from halfords for about 8 quid

 

[patriot66]

A decent sensor complete with o-ring can be had for £10 - £15. IIRC I fitted a Febi item https://www.ebay.co.uk/itm/334401083572?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=yi1ojZncSxy&sssrc=2349624&ssuid=gngtrv3rtq2&var=&widget_ver=artemis&media=COPY

 

[Oscar50]

Patriot66 Thank you so much, and thank you to everyone who took the time to reply, you have got to love this forum.
It was indeed the temp sensor, quick trip to GSF this morning and all fitted and sorted.

 

[bigwinn]

Winner!! Good job

 

[Oscar50]

Cheers bigwinn and thank you for your help.

 

[paddy wright]

Glad you got sorted,

oscar50

did you have a leak at what appeared to be where my yellow arrow is? And was the sensor where my red arrow is?

 

[patriot66]

Patriot66 Thank you so much, and thank you to everyone who took the time to reply, you have got to love this forum.
It was indeed the temp sensor, quick trip to GSF this morning and all fitted and sorted.

Glad to help

 

[paddy wright]

Looked yesterday and mine is the same- new sensor ordered- does the coolant system need bleeding after replacement?

 

[Oscar50]

Bled mine due to the fact I ended up changing rad and expansion tank, although I did sensor after this and only lost few drops, so you should be OK if you swap them quickly.

 

[paddy wright]

Bled mine due to the fact I ended up changing rad and expansion tank, although I did sensor after this and only lost few drops, so you should be OK if you swap them quickly.

Is bleeding an easy process?

 

[Oscar50]

I put the front up on ramps, started by putting ignition to position 2 and turning heater onto lowest setting and max heat. Undo bleed screw by expansion tank cap and fill system, then fired engine up again slowly topping up and wait for fluid with no air bubbles to come out of bleed nipple, left to cool down and re check level.