22 Jul 2024
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Fiat timing issues

Detailed instructions for Fiat Doblò panel van/station wagon (263) 1.6 D Multijet

Large numbers of the 1.6 D Multijet diesel engine are installed in Fiat vehicles. Significant errors are frequently committed when changing the timing belt. To ensure that the belt change operation goes smoothly, here’s a step-by-step explanation of the correct change procedure on a Fiat Doblò from the ContiTech Power Transmission Group.

First up

Special tools required:

Preparatory work:

Step-by-step instructions

Removal – camshaft belt:

2. Unscrew crankshaft pulley bolts and remove crankshaft pulley.

3. Remove locking tool (186089000) from flywheel.

4. Set valve timings to mark.

5. Disconnect plug of fuel pressure sensor so that bolt can be removed from camshaft housing. Unscrew bolt from crankshaft housing.

6. Insert locking tool (1870896900) into camshaft housing

7. Remove bolt from crankcase cover left next to crankshaft pulley and place gauge (2000003000) on crankshaft pulley (Fig. 2).

8. After checking the valve timing setting, gauge can be removed again and tensioning pulley can be released by loosening tensioning pulley bolt. Timing belt can now be removed.

Installation – camshaft belt:

1. Fit new tensioning pulley and idlers.

2. Loosen camshaft pulley by mounting counterhold (1870815000) on camshaft pulley and loosening camshaft bolt.

3. Camshaft locking tool (counterhold) (1870836000) is inserted.

4. Fit timing belt on crankshaft pulley, starting clockwise. Take care to ensure that timing belt is not creased during fitting! Timing belt must be tight between pulleys on tight side! Markings on timing belt must align with markings on camshaft pulley, crankshaft drive pulley and high-pressure pump pulley.

5. Then place gauge (2000003000) on crankshaft pulley again, secure with bolts and check valve timings.

6. Press tensioning pulley spring down using screwdriver until tensioning pulley pointer is aligned with bore.

7. Tighten tensioning pulley bolt, 23-28 Nm.

8. Retighten bolts of camshaft pulley to required torque using counterhold (1870811500). Tightening torque: 28-31 Nm + 40°.

9. Remove locking tools.

10. Turn engine through two revolutions in direction of engine travel. Set engine to TDC cylinder 1. Insert camshaft locking tool and crankshaft pulley gauge. If locking tool cannot be inserted, correct valve timings. Check timing belt tension again.

11. Remove locking tools and gauge, locate and tighten screw plug with the new O-ring in camshaft housing again (13-16 Nm). Remove holding tool and fit components in reverse order of removal.

12. Fitting: timing belt guard, crankshaft pulley (tightening torque 23-28 Nm), ancillary unit belt plus tensioning pulley and idler for ancillary unit belt, engine mount bolts and engine mount, air intake hose from air filter housing and air filter housing, air intake pipe from turbocharger, air flow sensor, engine cover, engine compartment underpanel, front right wheel and engine compartment underpanel right.

13. Record changing of original ContiTech timing belt on sticker supplied and stick this in engine compartment.

More technical support is available here