The timing mechanism drive chain is removed when repairing the engine, as well as when repairing timing assemblies

Preparing the car for the task

We install the car on a lift or an observation ditch and remove the negative battery terminal

Removing the decorative engine cover

Removing the cylinder head cover

We hang out the front part of the car and install it on a reliable support

Removing the right front wheel

Removing the protection of the engine crankcase

Removing the right front fender

How to replace the timing chain of a Mazda 6

We remove the drive belt of auxiliary units, described in the previous article

We install the piston of the first cylinder in the position of the TDC of the compression stroke, look at the article "How to install the TDC of the first cylinder of the Mazda 6 engine"

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the mounting bolt and remove the crankshaft speed sensor

For clarity, we show all operations on the removed engine

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the crankshaft pulley mounting bolt and remove the pulley

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the fastening bolt and remove the upper tension roller assembly with the bracket

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the three bolts securing the pulley of the water pump drive, and remove the pulley

We install a reliable support under the engine

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Removing the right suspension support of the power unit

Unscrew twenty-three bolts securing the cover of the gas distribution mechanism drive

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Gently pry the edge of the lid with a screwdriver

We remove the cover of the gas distribution mechanism drive

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Loosen the tightening of the bolts securing the camshaft sprockets

Check the installation of the piston of the first cylinder in the TDC position of the compression stroke

How to replace the timing chain of a Mazda 6

Press a thin screwdriver on the ratchet of the chain tensioner through the hole in it, unlock the tensioner

We heat the tensioner rod by pressing on its shoe

How to replace the timing chain of a Mazda 6

And fix the tensioner rod in the recessed position by inserting a suitable rod into the hole

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the two mounting bolts and remove the chain tensioner

How to replace the timing chain of a Mazda 6

Removing the chain tensioner shoe

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew one lower and upper fastening bolt each and remove the chain calmer

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

We remove the gas distribution mechanism drive chain

If it is necessary to replace the oil pump drive chain, unscrew the fastening bolt and remove the chain tensioner shoe

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

Unscrew the oil pump sprocket mounting bolt

And remove the sprocket along with the drive chain

We inspect the sprockets of the crankshaft and camshafts, as well as the oil pump

If necessary, we replace the tensioner shoe and the chain calmer

We install the timing chain on the crankshaft sprocket, and then on the intake and exhaust camshafts

We install the tensioner shoe and the chain calmer in place

How to replace the timing chain of a Mazda 6How to replace the timing chain of a Mazda 6

We install the chain tensioner in place and remove the lock, bringing the tensioner to the working position

We clean the landing surfaces of the timing cover and apply sealant to the cover flange with a roller with a diameter of 3 mm

Installing the cover of the gas distribution mechanism

Tighten the bolts securing the camshaft sprockets

Installing all the parts in reverse order

Installing a new crankshaft pulley mounting bolt

How to replace the timing chain of a Mazda 6

We screw the M6x18 bolt through the hole in the crankshaft pulley into the threaded hole of the valve timing mechanism drive cover, thereby locking the crankshaft pulley from turning

Tighten the bolt with a torque of 100 Nm (10 kgf.m) and then tighten it by 90 °

After installing the crankshaft pulley, remove the locking bar from the camshafts and the locking device of the crankshaft