RPI Engineering – V8 tdc check

According to RPI Engineering ……..

You cannot trust the indicated timing marks on your engine’s bottom pulley. We have found them to be up to 20 degrees out in the worst circumstances.
To check this, it is required to remove No 1 spark plug and rotate the engine (using some form of probe down the cylinder), to ascertain if No 1 piston and the indicated TDC timing marks do actually align as indicated TDC on your pulley.

To find out more click …… http://www.v8engines.com/electrics-1.htm#overview