350 with more leaks than you can imagine

[RichardJ]

Boog mentioned that the grommet is probably hard as a rock. A new grommet will seal better and make it easier to take that hose off/on.

The simple tool below is used for checking the PCV System. With the engine idling and the oil fill cap removed, this is placed on the fill hole for a go/no go indication.

You can also just place the palm of your hand over the fill hole or a strip of paper. There should be a slight vacuum felt.

If there is smoke coming out the fill hole, the PCV is not working or there is way too much blow-by for the PCV system to handle

[BigBird05]

When you get a new PCV Valve check the amount of vacuum on the hose. I have seen them plug up.

[weim55]

Originally Posted by RichardJ

Boog mentioned that the grommet is probably hard as a rock. A new grommet will seal better and make it easier to take that hose off/on.

The simple tool below is used for checking the PCV System. With the engine idling and the oil fill cap removed, this is placed on the fill hole for a go/no go indication.

You can also just place the palm of your hand over the fill hole or a strip of paper. There should be a slight vacuum felt.

If there is smoke coming out the fill hole, the PCV is not working or there is way too much blow-by for the PCV system to handle

Wow, i’ve never seen a tool like that before?! Where in the world did you acquire that, looks like something from the 70s! What you say for testing the system and having a slight vacuum in the crank case is correct. The blow by pressure can be the cause of oil leaks at various points on the engine as well. Typical on a high mileage worn out motor.

Steve weim55 Colorado

[Steeveedee]

We had those when I worked as a mechanic in the '60s. I usually use my hand to check for suction or pressure these days but (for example), Toyotas will exhibit pressure with the oil filler cap off. The newer stuff works differently from these old trucks, for sure.

[lil hoodlum]

Originally Posted by weim55

Wow, i’ve never seen a tool like that before?! Where in the world did you acquire that, looks like something from the 70s! What you say for testing the system and having a slight vacuum in the crank case is correct. The blow by pressure can be the cause of oil leaks at various points on the engine as well. Typical on a high mileage worn out motor.

Steve weim55 Colorado

I was wondering the same thing. I would love to own something like that. I would store it next to my dwell meter.

Seriously cool though. I haven't seen something like that either.