Quote:
Originally Posted by BroadHopper
and automomobile restoration is my hobby.
Nobozo is correct. The engine has to be at operating temperature, WOT, coil disconnected, and all plugs removed. You don't want to crank it too much as there is no oil pressure and may cause damage. Crank it just enough to give you a reading.
You will find a different reading on each cylinder. Usually 10% more or less from the factory specification is OK. If the engine was reconditioned and bored, the specification will change, usually lower.
If you really want a status of your engine health a leak test is better. But that is a whole new ball game.  |
years as a factory trained mechanic. The throttle DOES NOT HAVE to be wide open. You can flood the engine amoung other things. ALL you need is some air for the cylinder to compress. That will take several cycles of the engine. That is why you watch the gage and STOP when it stops climbing.
As for no oil preassure and damaging the engine that is false unless the engine is already bad. There is plenty of residual lubricant on the cylender walls and in the bearings to handle cranking revolutions. You are not "running" the engine but just turning it over.
ToW