Description
Exhaust and intake cam assembly for 1.4 HDI 66kw 8HY engines for CITROEN and PEUGEOT
Fully functional motor
Part description
This set of cams (intake + exhaust) is intended for the engine 1.4 HDI 16V (8HY) 66 kW in Citroën and Peugeot cars. It is a key part of the distribution, which controls the timing and valve lift – the correct function of the cams has a direct effect on engine operation, performance, running culture and consumption.
The part is suitable as a replacement when the cams are worn or when the engine is repaired after damage to the timings. When choosing, we recommend following the codes 0801Z9 and 0801AH.
Technical information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C3; Peugeot 1007
- Other numbers: not specified
Product codes
- Product codes: 0801Z9, 0801AH
Installation recommendations
The exact procedure may vary depending on the specific engine version and car model. Below is a general/typical procedure for replacing the cylinder head cams.
1) Before assembly
- Compare with the old part: codes 0801Z9 / 0801AH, design of cams (intake/exhaust), number and shape of bearing surfaces and seats.
- Visually check the cams for grooves, discoloration after overheating, chafing of the cam tips and damage to the mating surfaces.
- Check for damaged threads/fastening arrangement and the part is not deformed.
2) Necessary tools and materials (in general)
- Basic set of gola/albus/torx according to design
- Torque wrench (for final tightening according to the manufacturer’s service data)
- Cleaning agents for degreasing, clean rags
- Engine oil for pre-lubrication of friction surfaces
- Suitable gasket/sealing material according to dismantled parts (e.g. valve cover, etc.) – according to actual condition
3) Step-by-step assembly procedure
- Disconnect the battery (work safety) and secure the vehicle against movement.
- Access the upper part of the engine and dismantle the parts that prevent access to the timings and the head (depending on the specific design).
- Adjust the engine to the correct timing position and secure the timing mechanism in a suitable manner according to the service procedure.
- Remove the covers/components needed to release the cams (typically the timing drive parts and the cover/mounting over the cams depending on the design).
- Gradually and evenly loosen the mounting of the bearing bridges/cam fasteners (to avoid stress and cracking).
- Remove the original cams and check the surrounding parts (bearings/mounts, tappets depending on design) for signs of excessive wear.
- Before installing a new cam assembly, thoroughly clean the mating surfaces and pre-lubricate the friction points with clean engine oil.
- Set the cams in the correct position (intake vs. exhaust) and install the bearing bridges/mounts in the original order.
- Tighten the fasteners gradually in steps and crosswise/evenly (the final torque always according to the manufacturer’s service data).
- Reassemble the timing drive and check the correct timing settings according to the service procedure.
- Hand crank the engine (no start) to verify that there is no contact and everything is running smoothly.
- Reinstall the removed covers and surrounding parts, check the wiring/hosing and connect the battery.
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4) Post-assembly checks and test drive/function verification
- After the first start, watch for unusual sounds from the distribution area and check the tightness of the dismantled connections.
- Idle the engine, verify stable operation, then perform a brief functional check under normal load.
- After warming up, visually check again for possible leaks and the general appearance of the engine.
5) The most common assembly mistakes + how to avoid them
- Exchanging intake/exhaust cams → compare the shape and markings before assembly, mark everything.
- Uneven loosening/tightening of the bearing → always gradually and evenly so that tension does not occur.
- Assembly without pre-lubrication → always lubricate the friction surfaces and bearings with clean oil beforehand.
- Incorrect timing settings → follow the service procedure, manually rotate the engine after assembly.
- Underestimating the inspection of surrounding parts → when the cams are worn, the following parts often suffer as well, check everything before shutting down the engine.
Reasons why the part is damaged
- Insufficient lubrication (low oil level, clogged channels, long change intervals) leading to worn out cams and bearings.
- Poor quality or degraded oil and clogged filter – accelerated wear of friction surfaces.
- Faulty distribution timing or consequences of damage to the distribution mechanism.
- Long-term operation with atypical sounds (knocking/rustling in the distribution area) without timely repair.
- Engine overheating and subsequent changes in lubricant properties and material stress.
