Need help locating oil leak Z24

[Rickie B]

On left side of motor ,driver side, under exhaust manifold,there is a pipe thats always covered with oil,i believe this pipe goes around motor  to the pvc valve,i have changed the valve cover gasket and it is dry ,no oil around valve cover ,i thought maby blowing out of dip stick but fire wall is clean.so my question is what is under the exhaust manifold by this pipe that could be leaking ? could it be the pipe itself is there oil in this pipe? The pipe is also dry and clean where it goes into the block,its enough oil thats its making a mess on that side of the tranny ,the block is even dry under the pipe only the pipe seems to be oily.  Any Thoughts ????

[TENDRIL]

pics 

[datzenmike]

It's the block vent pipe. It presses into the block snugly... maybe it's loose. First I would make sure the PCV valve is operating. It should be sucking air out of the block through the tube and into the intake to be burned. Also check the hose from the valve cover to the air filter it must not be plugged also.

[Rickie B]

Thanks Mike,no leaks at the block where it is pressed in, very clean,i had replaced the PCV valve 2 months ago so its good,i did a weber conversion also a month ago so vent hose is new,the motor has probably less than 3000 miles on a new RE Build,motor is shiney clean,Mike there is a bracket spot welded to the pipe, maby cracked? is there that much oil in this pipe or just a little from blow by,because this a lot of oil leaking.could i pull the exhaust maifold out of the way without detaching from head pipe? could gat a better look at whats going on under there.

[DATSAN]

Whenever I've had this similar situation, I'd buy a can of degreaser, and spray the engine down really good with it. Then, I'd drive around the block to heat it up, come back and spray the engine off with a high-pressure sprayer or hose (making sure the residue is caught below with a plastic tarp or in a drain,) and make sure it's really clean everywhere. Then drive it around the block again, come back and see if anything leaks. If not, drive it to work and then check it at work, or maybe within 24 hours. You can usually pinpoint what's leaking and fix it within a day or so.

[datzenmike]

The vent only has fumes in it. Likely oil from before the valve cover gasket was changed.... or the gasket is not on right. It happens.

 

Yes spray the area down clean and watch it.

[Rickie B]

ok,cleaned her down ,but then its clean any way, you can almost eat off this thing " not that i would " it is definately not leaking from the valve cover to clean and dry all the way around,i have a strong susspesion its leaking between the Head and the Block this pipe runs parrallel with this seam. i will know more tonight after i drive it to work 40 miles away.Thanks for the tips i really appreciate it,will keep you posted

[Rickie B]

its leaking from the head gasket,why couldent it be something simple.Thanks guys for all the input very much appreciated

[DATSAN]

Actually, with this type of vehicle it's half as bad as a V8 would be, so count your blessings. Just remember to take the head completely off, and have the head surface shaved at a machine shop until it's flat, or you'll have a repeat problem. This stuff is a lot more fun than playing video games, you learn important stuff, and it keeps you off the streets. (There's a few more good things.) :D

[Rickie B]

Off the streets,in 3 months ill be 64,my street running days are over.I do have good news,i purchased this truck from one of my co wokers ,his dad and him rebuilt the motor,he said the head was completly rebuilt and resurfaced,new pistons,rings,bearings, oil pump, water pump,had the radiator rebuilt,new heater core,new hoses,belt.he said he and his pops would fix it ,that this should have never hapened and felt bad, has probably less than 3000 miles on the rebuild .thanks for all the input i appreciate it    :thumbup:

[datzenmike]

No way it's from between the head and block on the exhaust side. There's no oil anywhere near there in the engine to come out. Has to be from outside.

 

Only three things have oil on that side of the engine...

 

1/ Oil spray from the block vent pipe. Maybe a small hole or loose.

 

2/ Dripping from the valve cover gasket.

 

3/ Is the oil leak near the dip stick??? Does the dip stick seal properly in it's hole????

[Rickie B]

Definitely not coming from the valve cover,the oil is underneath the exhaust manifold ,completely dry on top,dip stick housing is dry and clean at the block,as for the vent pipe it is dry and clean where it presses into the block,Mike you stated before there is no oil in this pipe only fumes,if there was that much oil in this pipe there would be some kind of evidence at the intake manifold because the oil would pass through the pcv valve,pcv valve is dry.The person that rebuilt this motor said that it is very possible it could seep oil from the head gasket and especially on the exhaust side (from the excess heat).Anyway its coming apart so we will find the leak.Will keep you posted on what we find  

[datzenmike]

The oil vent tube directs combustion blow by gasses to the PCV valve into the engine to be burned. There may be a light oil fog but not much as it collects and runs back. Excessive blow by volume can push this oil fog to the PCV and you'll see blue smoke and higher oil consumption.

 

The oil gallery for the lubrication of the cam and valve train is on the far right side of the head above the oil pressure sender between Cylinder 2 and 3. No way it can cross over and leak out.

 

The head gasket could blow out to the side but doesn't explain the oil.

 

Is it wet oily or just black? Could be exhaust leak they are black.

[Rickie B]

OILY,no exhaust leak,the leak is underneath the back exhaust port As you can see from the pic Dry but OILY under back port  You can even see oil on the bell housing Will definatly know more when torn appart                                       DSCN2035 by Richard Boudreau, on Flickr

[Rickie B]

Good news, not leaking from head gasket or valve cover,vent pipe was cracked,picked one up at junk yard,NO MORE LEAKS, :thumbup:

[datzenmike]

Post #3.

[Charlie69]

Damn you proved Mike right again!  LOL

[Rickie B]

Yes, he was spot on,thanks Mike,i really appreciate your help

[datzenmike]

I get one right for every twenty suggestions. Let me smile for a little longer....

[KoHeartsGPA]

Fucking Mike :rofl: :thumbup:

[Charlie69]

No That is Datzenmike!  LOL