Removing and installing top valve timing housing: VW 1.2 (CBZA, CBZB, CBZC)

🧭 Before you start

Fits: platform code AJ5

• Opens: coolant

Don't miss

• Clean sealing surfaces carefully. They must be free of oil and grease.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Draining coolant from engine cooling system and charge air cooling system .
2. Open spring-type clips and pull coolant hoses (1) and (2) off.
3. Push catch (3) underneath coolant hoses and pull hoses upwards.
4. Put down coolant hoses to rear.
5. Remove all securing bolts from valve timing housing cover (1).

6. Remove valve timing housing cover.
7. To improve guidance of valve timing housing cover, screw 2 studs M6x70 (1) into cylinder head cover. [Note: The installation procedure must not be allowed to exceed 6 minutes from the moment when the sealant is applied to the point when the securing bolts are tightened to 8 Nm.The sealant starts to harden after 6 minutes.Note that the securing bolts are tightened in 2 stages.]
8. Clean sealing surfaces carefully. They must be free of oil and grease.
9. Apply sealantD 176 501 A1(1) to the sealing surface.
10. Apply slightly more sealant in area of (arrows).
11. Place valve timing housing cover (1) onto studs (2).
12. Unscrew studs and screw in securing bolts until finger-tight.
13. Tighten securing bolts to 5 Nm in specified sequence (1) to (5). — 5 Nm (3.7 lb-ft)
14. Tighten securing bolts to 7 Nm in specified sequence (1) to (7). — 7 Nm (5.2 lb-ft)
15. Push clamp (3) into bracket from top to stop.
16. Reconnect coolant hoses and secure spring-type clips (1) and (2) using hose clip pliers.
17. Fill coolant system with coolant .

Other VW procedures

• Checking fuel delivery rate, engine codes BSE, BSF
• Checking function and voltage supply, engine codes CDLG, CAVB, CAVC, CAVD, CBZA, CBZB, CTHD, CTKA
• Removing and installing natural gas tank 5, Caddy Maxi · 1 torque figures
• Removing and installing coolant circulation pump V50 · 1 torque figures
• Checking fuel delivery rate, engine code BGU
• Removing engine · 41 torque figures
• Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
• Adjusting valve timing – VW Passat B5 · 83 torque figures
• Removing and installing camshafts – VW Passat B6 · 39 torque figures
• Removing and installing coolant pump · 53 torque figures