Re: How to add a PCV Valve to a 1949 Packard

Posted by Packard 1948 On 2015/9/22 15:52:05

- other changes you may have needed to make in order to not rob too much vacuum from the engine manifold.

The PCV valve robs almost no vacuum from the intake because it is a calibrated hole with a spring loaded piston. The amount of vacuum leak is negligible. Only needed change is a slight idle enrichment adjustment.


- Did you simply block the existing draft tube hole?

Removed the draft tube and stuck a rubber grommet in it's place.


- Did you add any restriction to the Oil Filler Cap?

No. It already has a mesh filter so all I did was clean it in the solvent tank and squirt some oil in it and let the oil flow through the mesh.


- Are you able to report on power & economy effects?

Nope...the previous engine was essentially a 5.5 cylinder but now with all new exhaust valves it REALLY purs like a kitten. At first I was a little concerned because it seemed to run rough however with the help from this forum I was able to hot adjust the valves and after a bit of wear in it REALLY runs smooth.

Power wise she does not break any speed records however the new paint on the engine and the buffed out exterior paint job I am confident I have shaved off a couple of tenths from my 100 foot and quarter mile ETs. Additionally less sludge on the bottom of the car will increase gas mileage a bit. WIN/WIN/WIN if you ask me!!!

Bill