I have a 1993 NSX with 65K miles. I think the replacement recommendation is 5 years or 80k. Has anyone had a failure, and if so what age/mileage? Has anyone gone more than 8 years or 80K miles without replacing the belt?
The recommended replacement interval is 90,000 miles or 6 years, whichever comes first.
I replaced the timing belt and water pump on my '91 last year, after 9 years and 39K miles. I think this is something that wears more based on miles than on years, but the question then becomes how long you feel comfortable extending the period beyond the recommended 6 years.
Actually, I think the book say 6 years or 60K miles, but it either way you are due. Naturally their figures are very conservative because there is no sense in them taking such a huge risk. But the same could be said of us.
I did my 93 last year and found that the belt was like new even when bent backwards (test for dry rot), but the water pump had a whine not yet detected when running. It's possible a previous owner had replaced the belt, but I doubt it since the cover and pump were both the old style.
I replaced the timing belt on my '94 a few months ago with only 25k on the odometer. MYywater pump was leaking, and per the advise given here I did a new belt too. The old belt showed no signs of wear, but then again I am a proponent of preventitive maintanence.
It's very difficult to guess when something will fail, but the cost of replacing a belt and water pump is much cheaper than an engine re-build.
Wow...and I thought I was a garage queen! Based on replies to date, I have the highest mileage with no replacement and NSXTASY the longest calendar of nine years. I experienced similar inspection results on my Accord, that after 10 years and 100K miles the mechanic said the old belt could not be distinguished from a new belt...even the printing on the belt was like new. I just don't believe in overkill and if I average 5K miles a year, I could go 5 more years without a replacement for the 90K maintenance. And if I worked by the calendar, then another belt would already be due.
During the River Run a couple years ago, the T-belt failed in a turbocharged NSX driven by Buzz Clark (who seems to have disappered!). It trashed his engine, but I recall that his extended warranty company covered it.
Yeah, so I just replaced mine @ the 8 year mark...