Ok first off I have an 87 305 TPI turbo'd.

I have an oil leak that is coming from the front of the engine, appears to be passenger side. It isn't a constant leak, only when under boost or a hard rev ....which pulls boost.

Now, I dont have my PCV hooked up right now would this be my cause?

It isn't coming from the Oil return to the pan I checked that 2 billion times.

Is it possible that without the PCV it could be blowing oil out the front crank seal of the timing cover under boost? and would hooking up my PCV cure this?

anyone else encounter this?

BTW turbo+3rd gen owns me lol

 

possibly too much crankcase pressure...you could start blowing seals?

someone correct me if im wrong

 

So do you think that me not having the PCV hooked up is causing the problem....I guess I should get of my lazy butt, fab some stuff up and just hook it up.

Another Q:
Should I hook my PCV up to the suction of the turbo? I planned on doing this and adding an inline oil catch can.

 

I had that problem with the first engine I put the turbos on. It means your rings are fried or a piston is damaged. Do a compression check just to be on the safe side. It is not normal to have too much blowby. A remedy is to connect a breather to the intake (suction side) of the turbo. This helped me with the splattering oil and oil fumes until I rebuilt the motor.

Do like you said. Hook it up the breathe. Dont be lazy .

 

Got a SHORT bolt in the upper of the 2 smog pump bolt holes?

If not, put about a ¾" one there, with some sealer on the threads.

 

If I have excessive blowby shouldn't my oil be dirty or blackened quickly? or even thinned out? The oil in it has been in it for at least 250 miles W/ lots of idle time and still looks like the day I put it in. I was also told that me switching to Mobil 1 synthetic may be another reason that it is leaking.

I ran a line off each valve cover to a catch can and then to the suction of my turbo last night......of course I have to wait for my charge pipes to fully cure from being made perdy looking before I can check this out.
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The only smog related Equipment left on the car is the EGR....

 

Or you could run one line to a catch can with a breather and the other line from a good PCV to the intake.

Did you disconnect the TB air line to the valve cover when you disconnected the PCV valve early on? It sounds like you where boosting the crankcase with the air line connected.

 

No, all the PCV was disconnected but...yeah there is a butt lol. When I origionally hooked up my oil return I did the No No and returned it to the fuel pump block off....well I blew the turbine side oil seal....sooooo in turn I think this may have added to the problem of oil pushing out with exhaust pressure...Maybe?. Now it is returned to the pan.

also during my build I let the wife drive the car.....yeah, I did...trust me....I wont forget!

long story short she flew over some bad train tracks and put a hole in my oil pan...ouch. so the oil pan came off and a new one was installed...all cylinders and pistons looked very well from the bottom side...luckilly the piece she picked up in the oil pan stuck in it until she pulled into the driveway...where it puked all the oil out the hole.

 

After reading that, I knew it was going to get interested. Good to see you have a hobby that you both can enjoy.

I really don't think your rings are bad. Maybe the oil breather was plugged up a little bit. Using the catch can will help the breather not get gummed up with oil.

 

not having a pcv will not affect you. I prefer not to run one that dumps into the intake. That being said the vents in the heads are more than large enough to clear the crankcase. I would definately do a leak down test first. Providing it's not bad you could bandaid the blowby with a vaccum pump.

You could even go the diy route and use the vaccum pumps from the 80's cadillacs. You might be able to rewire it to sucknstead of push vaccum. It may not produce a lot but a litle may be all you need.....

 

I had the vents blocked off..... I bought a breather but it was too big so I blocked them off. If it ever gets out of the 50's and stops raining here in Ohio I'll test the car out with the PCV now hooked up