Our Products

-We specialize in BMW and Mini parts, supplying independent workshops and retailers.

Our products here at Mettec are well known for product quality. When you buy our parts you can expect exact fitment and reliability

If we wouldn’t happily fit a product to our own car, we won’t sell it. In fact, many of the parts on offer are either from original equipment suppliers or are equal to OEM quality, so you can be assured of the fit and longevity of everything you buy. We back it up with a 12 month warranty.

 

Stocklists Of Replacement Parts For BMW and Mini

 

 

Timing

Timing Image

For an engine to work at its best, the fuel/air mixture in each cylinder must fire just as the piston reaches top dead centre (TDC).

It takes a certain time for the spark-plug to ignite the mixture and for the combustion to build up. This time stays roughly the same no matter how fast the engine is running.

The timing mechanism is set to fire the plug a short time before the TDC. But because the mechanism is worked by the motion of the engine, this time would normally decrease as the engine ran faster, and the plug would fire too late.

So a mechanical device is fitted to advance firing – make it happen earlier – with increasing engine speed.

The load on an engine – whether it is pulling hard or cruising – also affects the timing.

A lightly loaded engine works best if the ignition is advanced an extra amount. A second vacuum-operated device controls this independently of the first.

Timing

Timing Image

For an engine to work at its best, the fuel/air mixture in each cylinder must fire just as the piston reaches top dead centre (TDC).

It takes a certain time for the spark-plug to ignite the mixture and for the combustion to build up. This time stays roughly the same no matter how fast the engine is running.

The timing mechanism is set to fire the plug a short time before the TDC. But because the mechanism is worked by the motion of the engine, this time would normally decrease as the engine ran faster, and the plug would fire too late.

So a mechanical device is fitted to advance firing – make it happen earlier – with increasing engine speed.

The load on an engine – whether it is pulling hard or cruising – also affects the timing.

A lightly loaded engine works best if the ignition is advanced an extra amount. A second vacuum-operated device controls this independently of the first.