Camshaft Belt and Balance Shaft Belt — General Information, Maintenance Intervals, and Part Numbers
Maintenance intervals and complete parts list for camshaft and balance shaft belt service on 944 and 968 models, including part numbers for belts, tensioner rollers, and related hardware.
Maintenance Intervals
Timing belts have long been a critical maintenance item for 944 owners. The recommendations below are based on the most recent factory recommendations, supplemented with additional guidance from practical experience.
944 Maintenance Schedule
| Mileage | Maintenance |
|---|---|
| 2,000 | Inspect and re-tension timing and balance shaft belts. |
| 15,000* | Inspect and re-tension timing and balance shaft belts. |
| 30,000 | Inspect and re-tension timing and balance shaft belts. |
| 45,000 | Replace timing and balance shaft belts. Inspect rollers and replace if necessary. |
* For vehicles which see limited service, inspect the belts after two years if 15,000 miles has not been reached, and annually thereafter.
968 Maintenance Schedule
| Mileage | Maintenance |
|---|---|
| 15,000 | Inspect timing and balance shaft belts. |
| 30,000* | Inspect timing and balance shaft belts. |
| 45,000 | Inspect timing and balance shaft belts. |
| 60,000 | Replace timing and balance shaft belts. Inspect rollers and replace if necessary. |
* For vehicles which see limited service, inspect the belts after two years if 30,000 miles has not been reached, and annually thereafter.
Parts
For highlighted items, choose one part based on specific model.
Note: Based on reported tensioner stud failures, it is recommended to replace the cam belt tensioner mounting stud at each timing belt replacement on pre-1987 model year cars (which are not equipped with spring tensioners).
Replace at Each Timing Belt Change
| Description | Part Number | Qty | Application |
|---|---|---|---|
| Camshaft Belt | 944 105 157 04 | 1 | 1983–88 924S, 944, 944T |
| Camshaft Belt | 944 105 323 02 | 1 | 1987–88 944S |
| Balance Shaft Belt | 944 102 219 02 | 1 | All 1983–88 |
| Tensioner Stud | 944 102 216 01 | 1 | 1984.5–1986 (see Footnote 3) |
Inspect and Replace Based on Condition
| Description | Part Number | Qty | Application |
|---|---|---|---|
| Cam Belt Tensioner Roller (Eccentric) | 944 105 027 04 | 1 | All 1983–1986 944, 944T; see Footnote 1 for 924S |
| Cam Belt Tensioner Roller | 944 105 631 04 | 1 | 1987–88 944, 944T; see Footnote 2 for 924S |
| Cam Belt Tensioner Roller | 944 105 631 10 | 1 | 1987–88 944S |
| Balance Belt Tensioner Roller | 944 102 025 07 | 1 | All 1983–88 |
| Cam Belt Roller (32.0 mm) | 944 105 273 02 | 1 | Old-style water pumps without belt guards: 944 106 021 13 / 951 106 021 01; Footnote 1 for 924S |
| Cam Belt Roller (46.2 mm) | 944 105 241 03 | 1 | New-style water pump with belt guard: 951 106 021 10; Footnote 2 for 924S |
| Balance Belt Roller | 944 102 277 06 | 1 | All 1983–88 |
| Balance Belt Gear Woodruff Key | N 012 708 2 | 2 | All 1983–88 |
| Crankshaft Woodruff Key (5 mm × 5 mm × 22 mm) | 900 117 036 00 | 1 | All 1983–88 |
Footnotes
Footnote 1: Also fits 1987 MY 924S up to engine #43 H 01919 (MT) & #43 H 60384 (AT).
Footnote 2: Also fits 1987 MY 924S from engine #43 H 01920 (MT) & #43 H 60385 (AT).
Footnote 3: All 944s through the 1986 model year used the eccentric roller tensioner and tensioner stud. The Porsche part number is for a stud that is 101 mm long. The earliest 944s used a tensioner stud that is 106 mm long. This longer stud may not be available from Porsche. It is also unclear as to the exact cutoff date when use of the shorter 101 mm stud began; it may coincide with when Porsche changed to a different style oil pump in the middle of the 1984 model year.