Kevlar Hose Failure

myredmx5 · Postby **myredmx5** » Wed Dec 28, 2016 8:24 am

BEWARE!!

Five years ago I replaced the coolest water hose in my 1993 MX-5 NA8 system with a Kevlar hose and today I found it has split. The hose I speak of is the one from the bottom hose metal extension to the water pump. The origin Mazda hose was not leaking but was replaced as a precaution because I changed the leaking water pump which was 18 years old. Now I intend to replace the failed Kevlar hose with a genuine hose and probably not worry about it for another 18 years. My car is a standard un-turboed, so the hose was under no extra pressure. Maybe someone on the forum can explain the failure.

Postby **NitroDann** » Wed Dec 28, 2016 11:50 am

Probably just not great quality control at the kevlar hose factory.

Dann

StillIC · Postby **StillIC** » Wed Dec 28, 2016 12:05 pm

Any chance of a photo of the failed part?

Code4 · Postby **Code4** » Wed Dec 28, 2016 12:14 pm

Anything man made will break. Thats the explanation.

myredmx5 · Postby **myredmx5** » Wed Dec 28, 2016 1:03 pm

MX-5 Kevlar Split Hose.jpg

Here is the split, hose came from Autolink UK.

93_Clubman · Postby **93_Clubman** » Thu Dec 29, 2016 8:08 am

Thought you sold the NA8 earlier this year, but then think you had two.

myredmx5 · Postby **myredmx5** » Thu Dec 29, 2016 8:31 am

Had 2 now have one.

manga_blue · Postby **manga_blue** » Thu Dec 29, 2016 9:31 am

I put the same kevlar hoses on my car at the same time. Earlier this year the lower radiator hose broke - not split or cracked or burst, just became totally brittle and broke like a piece of cheap plastic. It cost me a cylinder head. Not happy at all. It's the least stressed hose in the whole cooling system. I've ripped all the rest out and put in genuine Mazda hoses from Amayama.