I seem to remember replacing them in the 40K range give or take a few thousand miles, total junk belts… lol
The company I worked for in the 90’s, bought many non running ones from the auctions back then, even the running ones got a new timing belt just cause we saw so many failures back then…
Almost every vehicle we bought was in the 30K to 40K range, I would do plugs, wires, (cap and rotor if there), air and fuel filters, on most also did pads/shoes and machined rotor/drums if able or replace, rarely replaced though, new tires if around 1/2 worn, replaced a ton of steering wheels (grip came loose a lot back then) and any interior part needed , all lights had to work, new carpet on many of them, pulled the seats for the wash guy to do his clean up on etc etc etc…
The only thing we sent out was paint when/if needed, and had the fixed glass replaced, we did all the side glass…
Basically we made auction cars look like new again, inside and out…
This was a local rental vehicle company and the cars had to look and feel new…
We rented all of the big 3 size cars from Escorts to Town Cars, from Cavaliers to the full size GM’s and the same with the Mopar’s and a few trucks, plus all the JDM sizes and a few trucks, even had some Yugo’s, Hyundai’s and bought the 1st Kia’s north of Florida… Once the vehicle had been rented for 20K miles they were sold back at auction, so it was nothing to swap parts like radios, interior and non break down stuff like that from out going to incoming vehicles that need it, it was nothing to pull in 6-7+ vehicles at once and start inspections and tearing down for everything that needed to be replaced… We often bought vehicles with blown motors, head in the trunk, or slipping transmissions, bad clutches or whatever so we could get them as cheap as possible, and then make like new again… Heck I even rebuilt a few 3 on the tree Ford truck columns… lol
Me and one other guy (95% of the time) took care of an average of 250-500 vehicles in the fleet, that included all the normal maintenance and break downs… We would go out and do some stuff on the side of the road like ignition cylinder locks breaking, replaced many Escorts cylinder locks on the side of the road… Still remember using a chisel to loosing the tamper prof bolts… lol
Good grief that went longer than intended… 