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D4cb-Engine Timing Chain Kit Manufacturers

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Timing Chain Kit

Timing Chain Kit

To ensure the smooth running of the engine, all parts of the timing drive are matched to achieve absolute synchronization interlock, which ensures that each component in the timing drive can achieve optimal interaction while ensuring that subsequent ...
Camshaft Phase Regulater(VVT)

Camshaft Phase Regulater(VVT)

The variable valve timing (VVT) system optimizes engine performance and improves fuel efficiency by adjusting the phase of the camshaft. The main categories are as follows: Mechanical VVT: driven by centrifugal force or oil pressure, simple and durab...
Timing Chain Tensioner

Timing Chain Tensioner

Tensioner is a commonly used holding device on the belt and chain transmission system, which is characterized by maintaining that the belt and chain can have appropriate tension during the transmission process, so as to avoid belt slipping, or preven...
Timing Chain

Timing Chain

The main function of the engine timing chain is to drive the valve distribution mechanism of the engine, so that the engine inlet valve and exhaust valve can be opened or closed at an appropriate time to ensure that the engine cylinder can normally b...
Timing Chain Guide

Timing Chain Guide

The timing chain guide is used as the track or guide of the timing chain to connect the crankshaft and camshaft. Make the chain operate more stably and reduce the noise and damage of the chain and sprocket chain. Keep the engine timing belt and engin...
Timing Sprocket

Timing Sprocket

The timing chain wheel is the sequence (time) of valve opening and closing (time) ignition when the engine is running. Under the connection of "timing", the "synchronous" operation shall be maintained at all times. During the working process of the a...

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  • GB/T14212-2003 Certificates
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  • GB/T14212-2003 Certificates
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  • GB/T14212-2003 Certificates
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INDUSTRY KNOWLEDGE

D4cb diesel engine timing chain replacement tutorial: working steps and key torque parameters

D4cb diesel engine timing chain replacement tutorial

Tool preparation
Timing chain kit (including chain, guide rail, tensioner, sprocket)
Torque wrench (range 10~150N·m)
Special locking tool (fix crankshaft/camshaft position)
Ratchet socket set (8mm~19mm)
Marker pen, crowbar (auxiliary alignment mark)

Replacement steps and key operations

1. Safety pretreatment
Disconnect the negative terminal of the battery, drain the coolant, and remove peripheral components such as fans and belts.
Note: The diesel high-pressure pump (if any) needs to be depressurized in advance.

2. Fix the engine timing position
Rotate the crankshaft to the top dead center (TDC) of cylinder 1 and confirm it through the flywheel marking hole.
Use the locking tool to fix the camshaft gear (to avoid valve interference caused by misalignment).

3. Remove the old chain assembly
Loosen the timing cover bolts (sequence: cross-loosening from outside to inside) and check the chain wear (replace if the stretch length > 3mm).
Before removing the tensioner, lock its piston with a pin (to prevent it from popping open).

4. Install the new chain kit
Align the new chain with the crankshaft/camshaft sprocket according to the original factory mark (align the colored chain links or grooves).

Key torque parameters:
Crankshaft sprocket bolts: 80~90N·m + 90° angle (thread glue is required)
Camshaft sprocket bolts: 60~70N·m
Timing cover bolts: 20~25N·m (cross-tighten in 2~3 times)

5. Tensioner activation and verification
Pull out the tensioner lock pin to automatically tighten the chain.
After manually rotating the crankshaft 2 turns, recheck whether the marks are aligned and confirm that there is no abnormal resistance.

Precautions
It is strictly forbidden to violently hit the sprocket to avoid timing errors caused by tooth skipping.
When starting for the first time after replacement, run the engine at idle speed for a short time to lubricate the chain system.
It is recommended to check the oil pump chain (a common wear part in the same kit) at the same time.

Extended question

Q: How to determine the stretch of the D4cb timing chain?
A: Detect the chain sag (press the middle section displacement > 5mm) or read the camshaft phase deviation value through the diagnostic instrument.