Hello all,

I tried searching the forum without the result I am seeking. I am a new owner of a 2001 D2, I am somewhat good at mechanic and DYI. The item 13 on the sketch below on my D2 is broken, previous owner has a lot of hose patches along the way. I want to replace the item 13 however I notice the pipe seem to be some kind of plastic material. I tested the 5/16 hard line galvanized pipe which seem to be the similar ID as the plastic pipe. my questions are:
1 - does anyone know if engine coolant will corrode the hard brakeline galvanize pipe?
2- has anyone tried this method? ( using hard brake line vs OEM plastic pipe)?

another method would be using the 5/16 fuel hose (50psi) to connect reservoir tank to the top of radiator.

please advised

 

Most replace with a hose rather than another hardline. Not sure if brake hose will work but seems a lot easier to do maintenance with a soft rubber hose than a hardline.

 

If you use hose make sure to use automatic transmission cooler hose. Fuel hose is not rated for the temperature nor pressure.

 

Or stating the obvious, just replace with coolant hose. An old D2 I purchased had a long narrow rubber coolant hose on it instead of the hard plastic line.