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Re:Timing belts - age of
I agree with Alex. It depends heavily on environment and how much
antioxidant is formulated in the rubber. I think the timing belt
should be considered a mileage/time replacement part like all other
maintenance items. The general policy for tires is that new tires
over 3 years old should never be sold. Always check the date code
from the DOT code. I bought some snow tires years ago from a tire
dealer. They put the DOT code on the receipt and I remember glancing
at it to be sure they were freshly made. When I got the tires home,
I looked at them and realized the guy at the tire store put the
wrong date code on the receipt. I returned the tires immediately and
bitched him out for trying to deceive me. When I asked him why he
tried to sell me new tires that were 7 years old, he said he misread
the DOT code. I found it hard to believe he would get 10 out of 11
numbers and letters correct and confuse a "1" for a "4." Anyway, the
tires_looked_brand new, but the tread compound was very hard. IMHO,
I would not use a tire over 5 years old, no matter what the
> Phil Payne wrote:
> > Has anyone ever seen an age limit for timing belts in months rather than
> > miles? My own rule-of-thumb would be five years - anyone of a
> > different opinion?
> I don't have hard data, but it's a good question and five or six years
> sounds reasonable to me considering the cost of the belt. Also the
> environment during storage has to have an effect on its life. What about
> the belt taking a set if the engine isn't turned for extended periods? Radial
> tires do, why not timing belts?
> Even though the belt is protected from sunlight by the cover, it's still
> exposed to the atmosphere, and if the engine isn't turned it's more
> vulnerable in some places than others. That sounds like the makings of a
> potential nonuniformity in the belt to me.
> Speaking of deteriorating rubber products, I've noticed that the wiper
> blades on my girlfriend's car seem to be wearing out more quickly in the
> last two years, during which time it has been parked in an enclosed,
> public garage. Previously, it was parked beneath her building but the
> garage was not enclosed and was open to the outside. Maybe the extra
> smog is attacking the rubber?
> I'd be interested to hear what Rudy C. has to say about this subject
> (since he designs tires).
> Best Wishes,