"EGR DELETE" Instructions

I've unplugged the EGR and it's been great. No headgasket yet.

Not a fan of the PCV to atmosphere. Having a slight vacuum in the crankcase is a good thing that boils off water and fuel. I might check it with an oil analysis to know if PCV is still doing its job.

SM-A536V ?

 

You could check that more easily, by ascertaining that fresh air is entering the PCV intake.

Between the time of draft tubes, but before universal PCV, some engines got by with an intermedate stage, whereby blowby was vented to the upstream side of the throttle plate, so there was no fresh air entering the crankcase. That met the requirement not to dump nasty blowby gases into our atmosphere, but did nothing to flush condensation out of the crankcase.

 

This is so true!
With the pcv valve tubing directed to the atmosphere there is NO FLOW of air in the crankcase.
The crankcase blow-by gasses can just as easily go back towards the 'fresh air in' port,, as they are to push through the PCV valve which is expecting a lower pressure to suck the gases out.

A slightly lower pressure in the crankcase is good for the seals, rotating and stationary seals.

 

Back in the day, it was directed to the atmosphere through a 'road draft tube' that pointed down into the slipstream underneath the car. When you were moving at any sort of speed, that would suck the crankcase vapors out, while air flowed in through a breather filter somewhere else on an engine, flowing right through the crankcase.

Of course it didn't provide much draft when the car was moving slowly or stopped.