Oil coming from dipstick,leakdown results, Am I getting blow-by?

[BlueOvalStangGT]

I was playing around with my car the other day and then went to the gas station to fill up. I went to check my oil like usual and their was oil all over my sparkplug wires, a/c like all that stuff on my drivers side. I checked my dipstick and their was oil all the way up the stick so the oil obviously came from there. Just before that I changed my oil and I put way too much(for some reason I thought you had to add a little more for the blower). I figured I just put too much oil in. I drained some oil but it still blows oil our of the dipstick. I just got done doing a leakdown test on cyl 4 &5. Both of them, according to my gauge, said 65%-60% leakage and when I popped off my breather, I can feel air coming out. Not exactly want I want to hear but I guess its not that bad of timing since im outta school. I am however, broke and college is coming up soon so I need to replace it by then. What else could it be? Another thing, it only blows oil out under boost and WOT. Could that be something like a PCV valve or something pressurizing my crankcase? Im gonna go do a few more cyl with the leakdown tester and see what I come up with.

 

[94CobraPace]

Since air is coming out of the oil breather from the valve covers, I would guess it could be the valve guides, something on the heads letting air get into the valve cover.

 

[94-302-vert]

as the air is coming out of the crankcase it is either a really bad head gasket or you need rings.

Basically you are pressurizing the crankcase with the cylinder pressure. Is one (or two) cylinders worse than the others?

Chris

 

[S/CBlack95GT]

Make sure the PCV valve is seated properly in the back of the intake and do a compression test as well. It is possible a ring(s) may be shot.

 

[BlueOvalStangGT]

Bad news just did a compression test:

4-145 psi 8-70 psi
3-140 psi 7-135 psi
2-145 psi 6-135 psi
1-160 psi 5-125 psi

Of course, Number 8 cyl was the last one I checked so I was all happy that maybe my car is fine until I checked that one. Im gonna do it again to make sure there wasnt a mistake in my testing. The head gaskets were replaced 7-8 months ago too. Could a blown HG be pressurizing crankcase pressure tho?

 

[S/CBlack95GT]

Bad news just did a compression test:

4-145 psi 8-70 psi
3-140 psi 7-135 psi
2-145 psi 6-135 psi
1-160 psi 5-125 psi

Of course, Number 8 cyl was the last one I checked so I was all happy that maybe my car is fine until I checked that one. Im gonna do it again to make sure there wasnt a mistake in my testing. The head gaskets were replaced 7-8 months ago too. Could a blown HG be pressurizing crankcase pressure tho?

If the number 8 head gasket blew across to an oil passage, then yes, it could pressurize the crankcase. 70psi makes me think it is a ring though.

 

[94-302-vert]

All at once though? I am thinking it is the HG....

Does the coolant look OK (no oil in it)?

Oil is not frothy (white) I hope.

Isn't there a trick where you put some heavy weight oil onto the cylinder to help seal the rings then re-test the compression?

I know I remember that from somewhere...

Chris

 

[BlueOvalStangGT]

Actually before the oil shooting out, my coolant would leak from my thermostat housing and it seemed it was only doing that under wot or boost too but I figured it was jsut a leaking gasket. Coolant looks ok i guess, its not green but its not white like it was when I blew a HG like last time.

 

[yellow1995Cobra]

If you run the car, and take the rad cap off, do you see any bubbling at all?

I guess you should just pop the head off and see whats up.

 

[VibrantRedGT]

Ah the infamous #8 cylinder. When I pulled my head off there was a nice chunk of the #8 ring laying on the piston. Hopefully yours is just a head gasket.

 

[ljinx23]

Yes, if you put a few drops of heavy weight oil in the cylinder that is giving you the problem, and do another comp. test, you should have your anwser. If the compression goes up, its the rings. If still the same problem, more than likely the head gasket.

 

[BlueOvalStangGT]

How heavy of an oil are we talking here? Im gonna try this before I put down some money on an explorer engine. Only having to replace my headgasket, that would be a relief.

 

[BlueOvalStangGT]

Oh we did a leakdown test on it and it got like 80% leakage or something and you can feel the air coming out of the dipstick, does that say anytihng about if its a headgasket or a piston?

 

[94-302-vert]

I would say like a 20-50 oil or heavier.

And dipstick, oil filler, breather. doesn;t matter you got air getting into the crankcase some how.

Chris

 

[BlueOvalStangGT]

What are the chances its a headgasket?

 

[BlueOvalStangGT]

I have 15W 30 oil. Im gonna go try it now, CMON HEADGASKET!

 

[BlueOvalStangGT]

Ok it was 10W30 oil and I used like half a drinking straw of oil. Did the compression test and.....no change . If I pull the head off, would that be a definite answer? This really really really sucks.

 

[BlueOvalStangGT]

Wow am I an idiot or what? This whole time after I put oil in my cylinder and nothing happened FOR SOME REASON I thought that meant a blown ring/piston. I was jsut talking to my dad about what I did and how I asked for extra shifts at work to pay for a new shortblock and I realized that no change=blown headgasket!!! What a way to waste a whole day. I was so depressed about having to cough up all this money for a shortblock and now I might not have to. Im gonna start taking the head off tomorw I think. Once the head is off, how can I check how good my shortblock really is? Does that engine restore **** work?