White milky substance/ Oily coming from hole...

[dpascual1986]

Working on my ride, this hole (first picture) started leaking white milky fluid.

1. What is this hole for?

2. The White milky fluid was oily, so I assume I would have to change the head gasket. Is there any relation to the milky fluid and the missing pipe that goes into the hole in the first picture?

The previous person mickey-moused the car. I am learning so please dont set a noob on fire, I would like assistance.

Daniel

[Zed Head]

That is the crankcase ventilation hole. In factory form it would have a hose connected to it that was then connected to the PCV valve in the bottom of the intake manifold. It's a good thing to have and does not reduce power, so no need to include it as "emissions crap" like many do.

It's function is described in the Emissions chapter of the FSM - Index of /FSM

[Pomorza]

Daniel

That, as Zed Head described, is the crankcase ventalation tube. Basically its used to get blowby and other gasses out of the, well crankcase. The milkey substance you were speaking could be a mixture of oil and water (or coolant). This does not mean that your head gasket is blown. As described in a few topics recently, oil can absorb water, I believe up to ~1%. Basically when your car cools water can condence in the engine and then fall into the oil. This water can mix with said oil and turn it milkey. Usually you get rid of said water when you run the engine to operating temperature.

That being said, what motor/car/year are you driving? When was the oil last changed? When was the car last run?

Hope that helps

Jan

Edited July 10, 2013 by Pomorza

[dpascual1986]

Daniel

That, as Zed Head described, is the crankcase ventalation tube. Basically its used to get blowby and other gasses out of the, well crankcase. The milkey substance you were speaking could be a mixture of oil and water (or coolant). This does not mean that your head gasket is blown. As described in a few topics recently, oil can absorb water, I believe up to ~1%. Basically when your car cools water can condence in the engine and then fall into the oil. This water can mix with said oil and turn it milkey. Usually you get rid of said water when you run the engine to operating temperature.

That being said, what motor/car/year are you driving? When was the oil last changed? When was the car last run?

Hope that helps

Jan

73 240z, 75 l28. Hasn't been run in at least 2 years. Sli don't think my oil/water mixture is a condensation problem, I ran the car for about 10 mins ( no driving, just idle) and the block and head was hot enough to bead water, my radiator was cool to touch. Your two cents is appreciated.

[siteunseen]

Borrow a compression gauge from a local parts store, AutoZone has them. That will tell you if you need a new head gasket.

[olzed]

What you describe might be nothing more than condensation. Idling for 10 minutes is not long enough. Give the car a GOOD run to burn the water from the oil, then check for the milky substance. Idling is no good. Half an hour drive is better.

Also--

If there is there bubbles coming into the radiator this could be an indication of a blown head gasket.

[Zed Head]

Just noticed that my comment was assuming that the red circle, the PCV pipe, was the "hole" in question. Looking at his first picture though, I don't recognize that one, which seems to be the one he's referring to. It's so close I can't tell what it is.

Also, it looks like he's running carbs on an L28. So the PCV system will be different. The P might not be there, it might just be a V.

[dpascual1986]

Just noticed that my comment was assuming that the red circle, the PCV pipe, was the "hole" in question. Looking at his first picture though, I don't recognize that one, which seems to be the one he's referring to. It's so close I can't tell what it is.

Also, it looks like he's running carbs on an L28. So the PCV system will be different. The P might not be there, it might just be a V.

thanks for the replies guys. I will take better pictures this weekend and hope you guys can help me out. yes, it is a carbeurated l28.

I would like to idle it more, but the engine gets really hot but the radiator does not, maybe its clogged somewhere? Is this indicative of a needed headgasket replacement?

[LeonV]

I would like to idle it more, but the engine gets really hot but the radiator does not, maybe its clogged somewhere? Is this indicative of a needed headgasket replacement?

No, that means you haven't warmed it up completely. Is the car not driveable?

[dpascual1986]

No, that means you haven't warmed it up completely. Is the car not driveable?

it moves forwards and backwards, if that is your question, hehe. but no, i would not drive it any more than 4 feet. here is a better picture, I could not find anywhere to put a hose to... What should I do? If its just a vent that connects a hose to the stock air filter, can I just put a freeze plug cap on it?

Daniel

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[Zed Head]

Look in the Engine Mechanical and Engine Tuneup chapters of the 73 FSM, at the various drawings. You'll see the pipe that should be in that hole and a hose that attaches to it. Since you don't have PCV, the hose is probably attached to the air filter housing. It's called a breather. Normally that liquid would just drain back in to the engine, and vapors would get sucked in to the intake system.

[dpascual1986]

Look in the Engine Mechanical and Engine Tuneup chapters of the 73 FSM, at the various drawings. You'll see the pipe that should be in that hole and a hose that attaches to it. Since you don't have PCV, the hose is probably attached to the air filter housing. It's called a breather. Normally that liquid would just drain back in to the engine, and vapors would get sucked in to the intake system.

So what should I do with this? Obviously get the pipe that goes into it but where should the tube when I don't have the stock cleaner?