Hyundai i40 coolant issue

CJG1981

Hi guys , I'm hoping someone can help me here.
I have an i40 that is losing coolant somewhere, but theres no trace of it.

Rad has been changed twice.

Bottom rad hose has been changed twice

Reservoir is losing coolant overnight.

The car has never boiled over on me and the engine oil is not a milky colour.

Any more questions , please ask.
I'm hoping one of you can point me in the right direction.

Cheers lads.

Bmw123d

CJG1981 wrote: »

Hi guys , I'm hoping someone can help me here.
I have an i40 that is losing coolant somewhere, but theres no trace of it.

Rad has been changed twice.

Bottom rad hose has been changed twice

Reservoir is losing coolant overnight.

The car has never boiled over on me and the engine oil is not a milky colour.

Any more questions , please ask.
I'm hoping one of you can point me in the right direction.

Cheers lads.

If you have no obvious leak it’s going to have to be internal. Doesn’t always have to be water in the oil or under the cap for the head to be gone on it. It could also possible fail the opposite way. You need a mechanic to do the sniff test on it and c are there any gases in the exhaust or coolant bottle.
On a side note has the system being pressurized without the engine running and every hose and joint checked

magentis

Had this before on a car where the water pump was leaking ever so slightly.It evaporated when it leaked from the pump onto the engine.Extremely hard to detect.

sam ford

hi, some i40's had cyl head bolts that were slighty too long and leaving cyl head ever slightly under torqued, leaked out coolant under cyl head, worth checking,

mr_edge_to_you

Just wondering if the Op had any update on this?

CJG1981

mr_edge_to_you wrote: »

Just wondering if the Op had any update on this?

It ended up that there was a hole in the new rad also. So I brought it back to garage and they put in another new one.