Originally Posted by
Titus
I have a theory that the whole oil on the heater hose thing is more myth then reality. On my 1.6, the CAS was leaking, but none was getting on the heater hose (as it is on the other side as you have stated). Guess what... my oil free heater hose split just like all those that get blamed on the CAS leak. So did my upper and lower radiator hoses. Coolant hoses are rubber, and exposed to a ton of heat for a long time. They will all eventually split if you don't replace them at a reasonable interval. If your car has over 100k miles on it and you have not replaced them, I would recommend replacing all 9 regardless of oil leaks or how the hoses look.