Before common rail took over, VW's Pumpe Düse (PD) diesels — the 1.9 and 2.0 TDI found in Golf MK4/MK5, Jetta, Passat B5/B6, and Touran — used unit injectors instead, each one generating its own injection pressure locally via a rocker arm driven off the camshaft. That design difference matters for a timing belt job: there's no separate high-pressure pump sprocket to lock like on a common-rail EA288, but the camshaft pulley itself is slotted and adjustable, which changes how you set final timing.
Tool You'll Need
- 7-Piece Diesel Timing Tool Kit — crank locking tool and camshaft locking pin sized for VAG's PD and early common-rail diesel range
You'll also need a torque wrench, standard hand tools for the accessory drive and covers, and the correct belt and tensioner kit for your exact engine code (1.9 TDI ASZ/ATD/BLS and 2.0 TDI BKD/BMM/BMN, among others, all have detail differences).
What's Different From a Common-Rail Job
You're only locking two things here — crankshaft and camshaft — not three. There's no HPFP sprocket to worry about because the injection pressure is generated locally at each injector rather than by a belt-driven high-pressure pump. What PD engines add instead is an adjustable camshaft pulley: the pulley mounts to the cam through three bolts riding in slotted holes, which lets you fine-tune cam position after the belt is tensioned.
Step 1: Remove Covers and Accessory Drive
Strip the serpentine belt and timing covers to expose the crank pulley and camshaft sprocket.
Step 2: Rotate to TDC and Lock the Crank
Bring the crankshaft to Top Dead Center on cylinder 1 and fit the crankshaft locking tool from the timing kit.
Step 3: Lock the Camshaft
Try to insert the camshaft locking pin into the sprocket hub. If it won't seat — which is common, since belt stretch and prior adjustments shift the slotted pulley over time — loosen the three pulley bolts just enough to rotate the camshaft slightly until the pin drops in cleanly, then leave the bolts loose for now.
Step 4: Remove and Install the Belt
With both crank and cam locked, remove the old belt, then route the new one around the sprockets with tension on the non-tensioner side.
Step 5: Tension and Snug the Cam Pulley
Set belt tension per the tensioner's specification, then torque the three camshaft pulley bolts — commonly cited around 25 Nm on many PD variants, though confirm the exact figure for your engine code rather than assuming it's universal across the PD range.
Step 6: Remove the Locks and Verify
Pull both locking tools, rotate the crankshaft two full turns by hand, and bring it back to TDC. Try both locking tools again — if the camshaft pin won't go back in, loosen the three pulley bolts, nudge the cam pulley into position with the pin partially inserted, and re-torque. This settling-in step is normal on PD engines and isn't a sign anything's wrong; it's just how the adjustable pulley design works.
Step 7: While You're In There — Check the Cam Followers
PD engines are well known for camshaft lobe and roller-rocker wear, especially on cars that have gone long between oil changes or run the wrong oil spec. With the cover off, it costs nothing to inspect the lobes and followers for flat spots or scoring — catching this now is a lot cheaper than catching it after a lobe fails.
Step 8: Reassemble
Reinstall covers and the accessory drive, reconnect the battery, and start the engine.
Torque Specs
Values below apply to the three adjustable camshaft pulley bolts on the 1.9 TDI BEW and the 2.0 TDI BHW only. We have not verified other engine codes.
| Fastener | Torque | Notes |
|---|---|---|
| Camshaft pulley (slotted) bolts, three of them, BEW | 25 Nm (18.4 ft-lb) | Torque after the belt is tensioned |
| Camshaft pulley (slotted) bolts, three of them, BHW | 25 Nm (18.4 ft-lb) | Torque after the belt is tensioned |
- These are not the cam hub center bolt, which is a separate fastener with its own spec. Check your manual for it and for the tensioner and crank bolt.
Sources: Blauparts: BEW PD timing belt instructions; Blauparts: BHW timing belt instructions; TDIClub: BEW timing belt procedure; SKF timing belt kit instructions (VKMC 01250-1).
Always verify torque values against the service manual for your exact model year and engine before final tightening. These figures are provided as a reference and Wrench Haus is not responsible for damage resulting from incorrect torque.
Common Mistakes
- Assuming this is identical to a common-rail TDI job — no HPFP lock needed, but the adjustable cam pulley is a step common-rail engines don't have
- Forcing the camshaft locking pin — loosen the pulley bolts and nudge the cam instead of forcing a pin that won't seat
- Skipping the two-turn recheck — PD cam pulleys commonly need a second small adjustment after the belt settles
- Ignoring visible cam follower wear — a well-documented PD failure point that's cheap to catch during a belt job and expensive to catch later
See our full specialty and diagnostic tools lineup for more diesel-specific service essentials.
Frequently Asked Questions
How is a PD TDI timing belt job different from a common-rail TDI?
On a Pumpe Duse engine you only lock the crankshaft and camshaft, not three components, because each unit injector generates its own pressure and there is no belt-driven high-pressure pump sprocket. Instead, PD engines have an adjustable camshaft pulley mounted with three bolts in slotted holes, which lets you fine-tune cam position after tensioning the belt.
What if the camshaft locking pin won't go in on a PD TDI?
Don't force it. This is common, because belt stretch and prior adjustments shift the slotted pulley over time. Loosen the three pulley bolts just enough to rotate the camshaft slightly until the pin drops in cleanly, then leave the bolts loose until the new belt is installed and tensioned.
What is the torque for the PD TDI camshaft pulley bolts?
For the three slotted camshaft pulley bolts on the 1.9 TDI BEW and 2.0 TDI BHW, this guide lists 25 Nm (18.4 ft-lb), torqued after the belt is tensioned. Other engine codes weren't verified, and these are not the cam hub center bolt, which has its own spec. Confirm in your service manual.
What else should I inspect during a PD TDI timing belt change?
Check the camshaft lobes and roller rockers for flat spots or scoring while the cover is off. PD engines are well known for cam lobe and follower wear, especially on cars that went long between oil changes or ran the wrong oil spec. Catching it during a belt job is much cheaper than after a lobe fails.