We replace the chain when it is stretched and remove it when repairing the engine.
To replace the chain, you need to remove the engine from the GAZelle NEXT car
To perform the work, you will need keys: hexagons for 5, 6, socket heads for 10, 15 and a device for holding the phase sensor drive disk from turning.
Removing the engine.
Setting the piston of the first cylinder to TDC of the compression stroke Setting the TDC of the first cylinder Cummins ISF2.8
We unscrew the five bolts securing the crankcase cover of the gas distribution drive
Remove the cover
Remove the gasket. When installing, you need to replace the gasket
We unscrew the two bolts securing the cover of the hydraulic chain tensioner
Remove the cover
Remove the hydraulic tensioner plunger
We fix the chain by tying it with wire
Weaken the bolt securing the drive disk and the camshaft sprocket, keeping the shaft from turning.
We completely unscrew the bolt securing the drive disk of the phase sensor and the camshaft sprocket
After unscrewing the bolt securing the timing sensor drive disk and the camshaft sprocket, the crankshaft and camshaft must not be rotated so as not to disturb the valve timing.
Removing the disk
Remove the sprocket and chain from the camshaft shank
Remove the spacer so as not to lose it
Fix the timing chain with the sprocket on the engine
We unscrew the two bolts securing the timing drive housing to the flywheel housing
Location of bolts for fastening the crankcase of the gas distribution mechanism
Remove the clutch housing
We unscrew ten bolts securing the flywheel housing to the cylinder block.
The flywheel housing bolts vary in diameter and length, you need to remember their location.
The flywheel housing weighs 23 kg, so you need to remove it with an assistant.
Using a mallet or a rubber mallet, we move the crankcase from place and remove it together with the starter.
We unscrew the bolts of the shoe "A" of the tensioner and the damper "B"
We remove the bolts and remove the shoe and damper.
We inspect the shoe "A" of the tensioner and the damper "B", if there is heavy wear, then we replace them
Remove the camshaft sprocket from the chain
Having removed the chain from the intermediate gear sprocket, remove it from the engine
Install the chain and all parts in reverse order
Before installing the flywheel housing, make sure that the two mounting sleeves remain in place.
We apply a heat-resistant sealant to the mating surface of the flywheel housing to the cylinder block.
We tighten the bolts in the sequence shown in the figure.
We tighten the M8 bolts with a torque of 24 Nm, and the M12 bolts with a torque of 85Nm.
Checking the correct valve timing.