Coolant hose dimension
#1
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Guys,
I am currently away from the car and need to purchase this coolant hose.
May I ask the diameter and the length of this small coolant hose from the top of the expansion tank to under the oil cap please?
Thank you.
I am currently away from the car and need to purchase this coolant hose.
May I ask the diameter and the length of this small coolant hose from the top of the expansion tank to under the oil cap please?
Thank you.
![](http://farm3.staticflickr.com/2893/11722010635_d770c53ab4_h.jpg)
#2
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
8mm or 5/16" on US cars. I substituted generic fuel injection hose for this duty with good results..
#4
Nordschleife Master
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Kevin, the hose you've got arrows on runs from the expansion tank to the coolant bridge - its a factory special item, with different diameters at each end. Save yourself the headache and just order the correct hose, as the end of it at the coolant bridge is about a 12mm ID.
part no 927 106 275 03
The only coolant hoses you can substitute for the 5/16" Dr Bob mentions on a RHD car like yours is the one between the expansion tank and the coolant pressure sensor - i.e. about an 8cm length.
Also, if that hose has failed on your car, then you should be replacing all the coolant hoses while you're at it.
part no 927 106 275 03
The only coolant hoses you can substitute for the 5/16" Dr Bob mentions on a RHD car like yours is the one between the expansion tank and the coolant pressure sensor - i.e. about an 8cm length.
Also, if that hose has failed on your car, then you should be replacing all the coolant hoses while you're at it.