Coolant loss

[enuff_zed]

Does it go back to the heater matrix?
Item 1?

 

[enuff_zed]

See if you can re-seat it first.
Then try getting the seal out and looking for a replacement here:

polymax.co.uk/o-rings/o-ring-selector/

 

[birdy_z4]

See if you can re-seat it first.
Then try getting the seal out and looking for a replacement here:

polymax.co.uk/o-rings/o-ring-selector/

Thanks will check when I get home later although will be dark then unfortunately

 

[birdy_z4]

The hose connects under the air filter to the rear bulkhead which I presume is the heater hose

 

[enuff_zed]

The hose connects under the air filter to the rear bulkhead which I presume is the heater hose

image.jpg

Yup, Number 1 on the diagram I posted.

 

[birdy_z4]

The hose connects under the air filter to the rear bulkhead which I presume is the heater hose

image.jpg

Yup, Number 1 on the diagram I posted.

Thanks wiped all the area down and let the car warm up from about 30 mins, temp gauge on dash was between 60-80. Fan kicked in not extremely fast (my wife’s mini fan sounds lie take off) then stopped even with engine running.

I was expecting it to run for quite a while with the engine running and very fast to cool the radiator

Not run any codes yet but in your opinion does it point to the fan being faulty?

 

[enuff_zed]

The hose connects under the air filter to the rear bulkhead which I presume is the heater hose

image.jpg

Yup, Number 1 on the diagram I posted.

Thanks wiped all the area down and let the car warm up from about 30 mins, temp gauge on dash was between 60-80. Fan kicked in not extremely fast (my wife’s mini fan sounds lie take off) then stopped even with engine running.

I was expecting it to run for quite a while with the engine running and very fast to cool the radiator

Not run any codes yet but in your opinion does it point to the fan being faulty?

No, the ones on my wife's 2.5i and my E89 20iS hardly run at all.
Should kick in if you switch the AC on though.

 

[birdy_z4]

Yup, Number 1 on the diagram I posted.

Thanks wiped all the area down and let the car warm up from about 30 mins, temp gauge on dash was between 60-80. Fan kicked in not extremely fast (my wife’s mini fan sounds lie take off) then stopped even with engine running.

I was expecting it to run for quite a while with the engine running and very fast to cool the radiator

Not run any codes yet but in your opinion does it point to the fan being faulty?

No, the ones on my wife's 2.5i and my E89 20iS hardly run at all.
Should kick in if you switch the AC on though.

Thanks I will give that a try and see whether that works, if the fan is fine then it must be the seal (hopefully) not many options for new in the UK on the part number listed from BMW OEM

 

[enuff_zed]

Thanks wiped all the area down and let the car warm up from about 30 mins, temp gauge on dash was between 60-80. Fan kicked in not extremely fast (my wife’s mini fan sounds lie take off) then stopped even with engine running.

I was expecting it to run for quite a while with the engine running and very fast to cool the radiator

Not run any codes yet but in your opinion does it point to the fan being faulty?

No, the ones on my wife's 2.5i and my E89 20iS hardly run at all.
Should kick in if you switch the AC on though.

Thanks I will give that a try and see whether that works, if the fan is fine then it must be the seal (hopefully) not many options for new in the UK on the part number listed from BMW OEM

https://www.mlperformance.co.uk/products/genuine-bmw-64219134076-e89-hose-heater-core-to-radiator-inc-z4

Did you try simply reseating it?
Or the other option of taking that seal out, measuring it, and trying to buy just a new seal?

 

[birdy_z4]

No, the ones on my wife's 2.5i and my E89 20iS hardly run at all.
Should kick in if you switch the AC on though.

Thanks I will give that a try and see whether that works, if the fan is fine then it must be the seal (hopefully) not many options for new in the UK on the part number listed from BMW OEM

https://www.mlperformance.co.uk/products/genuine-bmw-64219134076-e89-hose-heater-core-to-radiator-inc-z4

Did you try simply reseating it?
Or the other option of taking that seal out, measuring it, and trying to buy just a new seal?

I cleaned the area down and gently wiggled the plastic connector before the test and it was not leaking. I've ordered a second hand (only £12) of a 2012 model so I can take the seal from this without spilling out the antifreeze to see what the seal is.

When this turns up I am going to use it to measure the seal and use this hose as plug when I disconnect the one on the car to prevent the antifreeze going everywhere (hopefully) method in my madness I think.

There is a steady pressuised stream/jet going pack to the filler tank so pretty sure it is not an issue with the water pump or thermostat

 

[enuff_zed]

Thanks I will give that a try and see whether that works, if the fan is fine then it must be the seal (hopefully) not many options for new in the UK on the part number listed from BMW OEM

https://www.mlperformance.co.uk/products/genuine-bmw-64219134076-e89-hose-heater-core-to-radiator-inc-z4

Did you try simply reseating it?
Or the other option of taking that seal out, measuring it, and trying to buy just a new seal?

I cleaned the area down and gently wiggled the plastic connector before the test and it was not leaking. I've ordered a second hand (only £12) of a 2012 model so I can take the seal from this without spilling out the antifreeze to see what the seal is.

When this turns up I am going to use it to measure the seal and use this hose as plug when I disconnect the one on the car to prevent the antifreeze going everywhere (hopefully) method in my madness I think.

There is a steady pressuised stream/jet going pack to the filler tank so pretty sure it is not an issue with the water pump or thermostat

For £12 you may as well give that a go yes.
Then possibly order two new seasls, refurbish the second pipe and you'll get at least your money back.
One point to note: you may find the company sells seals in minimum quantities. In which case, pretty sure you'll find home for ther others on here.

 

[birdy_z4]

https://www.mlperformance.co.uk/products/genuine-bmw-64219134076-e89-hose-heater-core-to-radiator-inc-z4

Did you try simply reseating it?
Or the other option of taking that seal out, measuring it, and trying to buy just a new seal?

I cleaned the area down and gently wiggled the plastic connector before the test and it was not leaking. I've ordered a second hand (only £12) of a 2012 model so I can take the seal from this without spilling out the antifreeze to see what the seal is.

When this turns up I am going to use it to measure the seal and use this hose as plug when I disconnect the one on the car to prevent the antifreeze going everywhere (hopefully) method in my madness I think.

There is a steady pressuised stream/jet going pack to the filler tank so pretty sure it is not an issue with the water pump or thermostat

For £12 you may as well give that a go yes.
Then possibly order two new seasls, refurbish the second pipe and you'll get at least your money back.
One point to note: you may find the company sells seals in minimum quantities. In which case, pretty sure you'll find home for ther others on here.

I will let you know how i get on

 

[birdy_z4]

I cleaned the area down and gently wiggled the plastic connector before the test and it was not leaking. I've ordered a second hand (only £12) of a 2012 model so I can take the seal from this without spilling out the antifreeze to see what the seal is.

When this turns up I am going to use it to measure the seal and use this hose as plug when I disconnect the one on the car to prevent the antifreeze going everywhere (hopefully) method in my madness I think.

There is a steady pressuised stream/jet going pack to the filler tank so pretty sure it is not an issue with the water pump or thermostat

For £12 you may as well give that a go yes.
Then possibly order two new seasls, refurbish the second pipe and you'll get at least your money back.
One point to note: you may find the company sells seals in minimum quantities. In which case, pretty sure you'll find home for ther others on here.

I will let you know how i get on

Hi question you stated in a previous message that if you turn on the aircon the fan would come on

I’ve just tried that just now

Started engine
Moved both temperature zones to coldest
Switched on aircon

Fan does not come on!

 

[birdy_z4]

Ok so turn on aircon fan does not come on

Turn off aircon and comes on very slow and only for a few seconds

 

[birdy_z4]

Ok so turn on aircon fan does not come on

Turn off aircon and comes on very slow and only for a few seconds

Had to put on max cold then it kicks in but only for a minute

 

[birdy_z4]

Think I have found the issue does not look like the hose but the radiator

 

[enuff_zed]

Think I have found the issue does not look like the hose but the radiator

IMG_1646.jpeg

Feck!
That looks like it's been spraying onto the pipe and confusing us all!
Did you not say you had the rad changed earlier this year?
Surely a warranty claim on it?

 

[birdy_z4]

Yes July and less than 2k miles later

It’s going back to the garage tomorrow :|

Glad I bought the pressure test kit saved me lots of time and hassle.

 

[enuff_zed]

Yes July and less than 2k miles later

It’s going back to the garage tomorrow :|

Glad I bought the pressure test kit saved me lots of time and hassle.

Ah is that how you found it? Well done.

 

[birdy_z4]

Yes July and less than 2k miles later

It’s going back to the garage tomorrow :|

Glad I bought the pressure test kit saved me lots of time and hassle.

Ah is that how you found it? Well done.

New radiator fitted let’s hope this one lasts longer