What is this?! (pics)

[MustangGT95]

I have been fighting an oil leak from my manifold. I removed the upper and stuff and I found this. It is on the block behind the lower manifold. It appears to be threaded. It was filled with oil whenever I first saw it. But it could have just been were it was running out of the intake.

Also is there a gasket for the distributor? Or just the o-ring around the shaft? Because once again one or the other is leaking from the front.

I have done many manifold installs and I'd hate to think I messed up so bad that I have the front and back leaking.

 

[MustangGT95]

It almost looks like an oil pressure sending unit hole. If so I may try to plug it. From what I can tell its definetly threaded. And at least an inch deep.

If so that would definetly explain my oil leak...and the reason for the tons of vapor I have coming from the back of the motor.

 

[mo_dingo]

Those pics are really zoomed in, Can you get some that have some reference points. Zoom out just a bit please. And they are really blurry as well.

And there is only an o-ring for the dizzy. no other seal.

Check out the o-ring that's there and make sure it's not messed up. Maybe you could use a slightly thicker o-ring if the one that's there isn't torn or cracked.

3rd pic is the hole for the dizzy, right? The top 2 are at the back of the intake, right?
Scott

 

[MustangGT95]

Yea you are right. In the top pic you can see the back of the lower intake.

If I zoom out you can't even see the whole. The whole I am looking at is behind and slightly to the left of the PCV grommet.

I believe this motor is from an f150 if that matters. It is a 302 and its roller thans about all i know lol.

 

[MI95Cobra]

its sort of looks like the pvc hose that goes from the upper intake to the back of the lower intake thats on the block...

 

[MustangGT95]

My PVC hose runs from the PCV to both large 3/8'' vac lines on the intake. Is that right? Might be why I have alittle oil in my TB.

It doesn't stick up so I don't know how it would be part of the PCV system but I may be wrong. It does look like a possible place for a oil pressure guage.

Anyone have a diagram of the PCV system routing?

 

[S/CBlack95GT]

That hole has a bottom. It goes no where. I dont really know why it is there.

 

[mootang]

That hole has a bottom. It goes no where. I dont really know why it is there.

that hole in the back of the block doesn't lead to anywhere, so nothing is leaking from there.

 

[Green 94 5.0]

probably a stupid question here, but are you sure the oil isnt coming from the front and the rear where the lower intake meets the block?

 

[MustangGT95]

I'm pretty sure it is. I was just trying to rule things out because I just changed the lower intake gaskets last week.

I have done it a bunch of times and I have never had one leak. Then this time the front and back are leaking. Just trying to make sure something else isn't wrong.

 

[Green 94 5.0]

did you use the cork that comes with the gaskets or did you use rtv?

 

[MustangGT95]

It came with blue rubber gaskets for the walls. But I did not use them. I used RTV.

I am not sure how I screwed up so bad. Maybe I didn't give the rtv enough time to setup. I was rushing. Trying to get the car finished because I hate my truck lol.

I am taking my time this time. And getting some all thread so I can make sure it goes down straight.