PCV Connection Questions

[Dolamite]

My CJ5 has a AMC 258 i6 / 4.2l with a 2-barrel Weber carb. I have no complaints about how the engine runs, but I noticed the PO only has one of the ports from the PCV connected to anything. The other port is left open.

Question #1: What should I connect the open port (circled in blue on the attached picture) of the PCV to?

Question #2: Should I install a breather on the rear opening in the valve cover (circled in red)? It currently has a rubber plug installed.

As I've stated earlier, everything runs great. I just don't want to cause any damage to the engine.

Thanks for the help!

 

[mtnwhlr]

Your PVC looks to be hooked up right the one in the back was a hose that ran to the air filter they probably pluged it when they went to a aftermarket air cleaner.

 

[Dolamite]

Your PVC looks to be hooked up right the one in the back was a hose that ran to the air filter they probably pluged it when they went to a aftermarket air cleaner.

Thank you mtnwhlr. So you think I should just leave it as it is? The port of the PCV that is open doesn't need to be connected to anything?

Appreciate your input!

 

[mtnwhlr]

The hose from the PVC should be hooked to the port at the base of the carb.

 

[Torxhead]

Dolamite, I would suggest installing a breather at the rear hole in the valve cover. This helps relieve the crankcase pressure from an old engine.

 

[Dolamite]

Dolamite, I would suggest installing a breather at the rear hole in the valve cover. This helps relieve the crankcase pressure from an old engine.

Adding a breather would probably prevent the dipstick from popping out and leaking oil, wouldn't it? Any downsides to a breather?

 

[Torxhead]

The biggest downside would be if you have to go in for emissions testing. Excessive blow by should get filtered out so deposits won't collect on your firewall. It pretty apparent that you have a lot of pressure in your CJs crankcase if you can blow out a dipstick.

 

[Dolamite]

Got it. Thanks Torxhead!