On Oct 11, 2:31*am, "TE Chea" <4...@gmail.com> wrote:
> | 8 years is probably beyond the normal lifetime of a radiator
> | cap.
> Then why service schedule does not specify when to change ?
> The rubber gasket of my radiator cap made by Toyo in 1990
> is still fine. *Leaky rubber is hard & has fine cracks, this
> gasket has no such cracks, neither do the rubber hoses made
> by Yamashita in 1990, all are still soft as new, on my F20A.

Its not the rubber that fails, its metal fatigue in the spring. As
for why its not in the service schedule I can only guess that its
considered a normal maintenance item, like checking the air in the
tires & checking the level of the oil. I am fairly certain that if
you pull the cap from any random 8 year old car on the street and test
it, the probability is high you will find it is not holding specified
pressure.