The upper dead center of the first cylinder in the compression stroke is set when removing the camshaft drive belt

To complete the task, tools will be required: devices for fixing the crankshaft and camshafts, a socket wrench for 10, cap wrenches or heads for 8, 13, 18

We prepare the car and install it on a lift or an observation ditch

Disconnect the negative battery terminal

Removing the decorative engine cover

Removing the cylinder head cover

Removing the right front wheel

Removing the engine mudguard

Removing the right front fender

We have reviewed all these works in previous articles

Turning on the neutral gear in the gearbox

How to install the TDC of the first cylinder of the Mazda engine 6

We turn the crankshaft of the engine by the bolt of its pulley attachment so that the hole in the crankshaft pulley does not reach the threaded hole in the timing cover by about 45 °, and the cams of the valves of the first cylinder are directed upwards

How to install the TDC of the first cylinder of the Mazda engine 6How to install the TDC of the first cylinder of the Mazda 6 engine

Loosen the tightening and remove the plug located in the front of the cylinder block on the right

How to install the TDC of the first cylinder of the Mazda engine 6How to install the TDC of the first cylinder of the Mazda 6 engine

Screw in the fixing rod (M10x1.5 fixture)

The figure shows a device for installing the crankshaft in the TDC of the compression stroke

How to install the TDC of the first cylinder of the Mazda engine 6How to install the TDC of the first cylinder of the Mazda 6 engine

Carefully turn the crankshaft by the fastening bolt of its pulley until the shaft stops with the locking rod. In this position, the end of the counterweight of the crankshaft rests against the rod of the fixing device

We install the locking plate in special slots in the rear of the camshafts

If the device was installed without difficulty, the piston of the first cylinder is in the TDC of the compression stroke and the initial setting of the timing phases corresponds to the norm

If the device could not be installed (the gas distribution phases are shifted), adjust the gas distribution mechanism drive, for this:

How to install the TDC of the first cylinder of the Mazda engine 6

Loosen the tightening of the bolts securing the camshaft sprockets without unscrewing the bolts completely

We install the locking plate in special slots in the rear of the camshafts

How to install the TDC of the first cylinder of the Mazda engine 6

And tighten the bolts securing the camshaft sprockets, holding the shafts by the hexagon

We remove the fixing device and check the installation of the TDC again

Installing the removed parts in reverse order