Originally Posted by jreiley
The way the prior owner of this car got his crankcase vacuum was putting a bung in the valvecover and plumbing to the vacuumm gauge. Is this a good way to get the vac reading. There is no vac pump on this engine and its a normal oiling system.
Yes, that is a good way to get a reading. Pan evac systems may be old school, but not everyone can afford to put a vacuum pump on. There is nothing wrong with doing it that way and if it has 4-5" of vacuum that is much better than positive pressure. Are you running gas, E-85 or alcohol? Gas is much more forgiving of a pan evac system. The expansion of the water in E-85 and Methanol can create a positive pressure in a crankcase if it doesn't have some relief, I.E. vacuum pump, pan evac or just the blowdown tubes you see on blown cars.
Curtis