Engine Top Dead Center. In order to perform any interventions on your toyota vvti engines timing system or cam shafts youll firstly have to put the engine in top dead center position. You should feel pressure start to build if not your not on the compression stroke and you need to crank the motor over another 360.
There are many methods that you can use. For example when checking the tappet clearances of the engine it is important to know which unit is at tdc. As your 1 piston comes up in the cylinder put your finger over the spark plug hole.
Do not turn the key in the ignition to use the starter to do so as it can cause serious damage to the engine if the piston strikes the piston stop tool you inserted.
Most of the time piston 1 will be at tdc when the crank shaft is at tdc but i once had a vehicle where the harmonic balancer had failed. Locating top dead center is important. Do not turn the key in the ignition to use the starter to do so as it can cause serious damage to the engine if the piston strikes the piston stop tool you inserted. As a general reference point or when installing a distributor top dead center on the compression stroke is.