You will never get an RTFM answer out of me. (Besides, there are no 93 16v 940s.)

Either way you look at it, you can go until around 100k with that belt. At that point I'd personally say, replace the belt and the belt tensioner to avoid future problems. I believe that belts CAN go for 100k, but it is largely dependent on how the car is driven. A highway car can easily get 100k from the same belt, a city car might only get 55k, but it could take seven or eight years. Of course, a lot of city cars have low miles, but could use an hourmeter instead of an odometer.

I cut this from Volvo's service interval manual and it pretty clearly says what the 50k/100k service schedules are. I learned something from this.

So for your convenience: Two service intervals from 1993MY service lit. Details what gets changed for which models.


***********************************************

1993 940

50,000 AND 100,000 MILES:
TIMING GEAR BELT (B230F AND B230F Turbo WITHOUT EGR): REPLACE (READJUST AT 60,000 and 110,000 MILES)-

Ensures proper tension is maintained.

Check for belt wear.

Replace worn belts to avoid belt failure while driving.
TIMING BELT, '94 Models only (B6304S): REPLACE -

Ensures proper tension is maintained.

**********************************************

100,000 MILES:
TIMING GEAR BELT (B6304FD and B230F Turbo WITH EGR): REPLACE (ADJUST AT 110,000 MILES)-

Ensures proper tension is maintained.

Check for belt wear.

Replace worn belts to avoid belt failure while driving.
EGR SYSTEM (940 Model)CLEAN-

Removal of carbon deposits helps engine run clean.

Maintains proper emission control.

*************************************************


Hope this helps.


--
Chris Herbst, in Wisconsin.

Unless I'm mistaken (I did RTFM), the turbos use a heftier belt right out of the box and the interval was set at 100k. The NA's came with less than hefty belts and their interval was 50k. I suspect the aftermarket belts are all the same by now (why manufacture 2 different belts when one will replace 2 applications?) and can stand up to 100k (to be sure, check the replacement part # for both type engines). Both my 940's lasted to 100k when I replaced them. I did readjust the tightness periodically on them. Don't forget the tension idler when you change the belt. It will start screaming around 140k, freeze up shortly thereafter, and there goes the belt.
--
Bob Kraushaar '94 945T, '91 940T(ret), '88 240, '84 242T, '94 F-150, '89 560 SL, '68 Shelby GT-500 KR

So it's RTFM, 50K, the newer ones are more robust, 60K and 30K. Perfectly clear. Thanks and Happy New Year!
--
93 945 75K

This is and RTFM (read the f- manual) item. If the car is a 16 valve, follow the change schedule scrupulously. A broken belt means bent valve$$$$. For an 8 valve engine, a broken belt means the inconvenience of a car that won't run until the belt is replaced. You have the option of running to failure (probably 150,000+ mi) or replace at the interval of your choice (100,000 mi?) to avoid being stranded at an inoportune moment)
--
'61 122s B16, '67 122s B18, '76 245 B21F, '81 245 B23E, '90 745 B234, '95 960 B6304 (not counting parts cars)

Actually, the timing belt maintenance interval is 50K. The tune up and valve
adjustment is 30K. HT

94 944T 94K
90 244DL 139K

The 940 timing belt should be changed every 30,000 miles