I was surprised to see that the recommended interval for the accessory belt is 9 years or 160,000 miles!

Have you changed yours, and what’s the real world interval?

Same questions for the supercharger belt.

7 years but only 52,000 miles on my car.

I was thinking that having the belts off would be a good chance to check the water pump and all the pulleys for issues.

 

The F-Type is not really old enough to use for such data points. The early versions suggest replacement at 6 years which some of the early owners have just started hitting in the last year. The later versions with updated geometry suggest 9 years. I'm not aware of any factory belts that have failed yet.

FWIW, I had mine replaced over of the summer. The dealership said they would give me the old belt, but when I picked up the car the mechanic had tossed it. My car doesn't have a lot of miles (18k) on it so I doubt there was much wear on it.

 

I realized the SC belt change was missed, with me alternating between changing the oil myself, and having the dealer do the bigger scheduled maintenance. 8+ years, 75k miles so far, but I’ll change it this spring.

Should have had it done when the dealer replaced the SC isolator in the fall of ‘20.

 

I would make it a practice to do a yearly inspection of the belt at year six and check for cracking.

 

Thanks for the reminder.
My car is now seven years old but only just over 70,000 km so I guess the accessory drive belt is OK and not in need of replacement.
But by sheer coincidence I just received an email from Rock Auto about some close-out sale items and guess what, the exact right belt is one of those items going cheap, so I bought one! No need to fit it yet but peace of mind knowing I have a spare on hand.
This same belt fits all AJ133 V8s and AJ126 V6s across the Jag range including the F-Type.

Edit - third item down on this page: https://www.rockauto.com/en/catalog/...rive,belt,8900

 

FWIW...Some components have both a time and a mileage element to the maintenance schedules due to the materials potentially degrading over time. Drive/accessory belts are one of those items. Likely the items MAY last well beyond the maintenance period, but schedules are there for safety, and to ensure proper performance of all of the items. Per JLR anyway, the scheduled maintenance on the belts is 72 months OR 96,000 miles. So whichever is reached first is the trigger. I doubt seriously that the belt will come apart @ 72 months and 1 day or @ 96,001 miles, but just something to watch for and consider.

Similarly, tires have a DOT stamp on them (at least in the US) and it is recommended not to run tires that are over 6 years past the DOT production date stamp (generally...though some manuf. state 10 years for some applications) for the same reason...Rubber compounds break down over time.

Just FYI. Do what works for you.

DC

 

Modern rubber belts do not crack.

They harden, then slip.

Sometimes they will get noisy, but often times they won't.

++++++++

Modern coolant hoses (rubber) last a lot longer than twenty/thirty years ago, too.

 

I'm showing my age LOL
But still learning something new everyday

 

I just replaced the one on my Mini, 10 years and 80K miles. It had a lot of cracks, and a significant chunk missing. The water pump pulley was also cracking (pulley has a rubber rim and directly drives off the crankshaft pulley on a Mini).

Probably need to take climate into account, hotter = faster degradation of rubber parts.

 

I've been doing a lot of timed maintenance, as my car is still pretty low miles. Replaced the supercharger belt at 6 years this past Nov (which is what the schedule I was working from said: 6, not 7?). I'm sure that wasn't strictly necessary. Replaced tires that had plenty of treadwear but were old. Aligned all the wheels, which was barely out of spec.