Is my engine shot?
Thread Starter
Racer
Joined: Nov 2015
Posts: 408
Likes: 5
From: New York
Is my engine shot?
So my 02 z06 procharged is killing me. First I thought I had a procharger was leaking because I was getting oil all over engine and tons of smoke all of a sudden out of catch can so I got a new D1sc. First time I started it oil was shooting out from behind harmonic balancer. I just pulled the front apart and changed the seals and today just got it all back together and it started up and no oil but still tons of smoke out of catch can. I took catch can off and started it and it's shooting misty oil and smoke out of pcv hose. After I shut engine of I hear a hissing then hear sizzling from something dripping on headers or somewhere else hot but can't see where it's coming from. I have no clue what to do now but bring it in to someone to check it out and rape me. Or do I just buy a new engine.
Advanced
Joined: Feb 2004
Posts: 55
Likes: 3
From: Lake Stevens WA
If your crankcase is being pressurized while at an idle (off boost) then it could be a blown headgasket? I would definitely have it diagnosed by someone competent before dropping the money on a new engine. Good luck man!
Thread Starter
Racer
Joined: Nov 2015
Posts: 408
Likes: 5
From: New York
Thanks. how can I check that before I bring it in? Also how would a blown head gasket make the crankcase pressurized? I'm pretty sure that's something I can do if it is that. I did a cam swap by myself.
Team Owner
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if you are interested in a forged motor let me know...I am in FLA but you never know...motor hardly has any miles on it...its coming out of the car as we speak as part of a complete part out...selling it and the maggie separately
just throwing that out there...goodluck
just throwing that out there...goodluck
Thread Starter
Racer
Joined: Nov 2015
Posts: 408
Likes: 5
From: New York
So I been reading a lot online and a lot of people are saying the oil shooting out can either be a vacuum issue or my pcv isn't setup right. This is how my pcv is setup on my ls6. I had that end going on a one inlet vented catch can. Nothing is going into or coming from the intake manifold. Just a line from the passenger side head and the valley cover.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
When you make boost you loose vacuum. Maybe the supercharger is pushing air into the PCV system the wrong way where it inters the throttle body. There needs to be a check valve (PCV valve) in the line to keep it from doing that. I don't see one in the pictures. You might be getting boost in the crank case and catch can through that line. That could be enough pressure (8+ PSI) to push oil out of the seals. If you do have a PCV valve make sure it isn't in backwards.
If you are concerned about the condition of your engine then just do a compression test. Compression gauges are not expensive. They usually measure above 175 PSI, or possibly lower but should be within 10% of each other.
Check all 8 cylinders and look at the condition of each plug. You can find a chart that tells what the deposits on the plugs means. You can label the plugs and post pic's if you want.
I doubt you are having engine failure based on the information you have given.
If you are concerned about the condition of your engine then just do a compression test. Compression gauges are not expensive. They usually measure above 175 PSI, or possibly lower but should be within 10% of each other.
Check all 8 cylinders and look at the condition of each plug. You can find a chart that tells what the deposits on the plugs means. You can label the plugs and post pic's if you want.
I doubt you are having engine failure based on the information you have given.
Last edited by Rob 02; Jun 9, 2017 at 03:38 AM.
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Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
It is a one way valve so you don't get pressure in the crank case. You probably need an aftermarket one for blowers or find a PCV that will fit to block boosted air. Here is a diagram with a breather. That line could go somewhere in front of the blower.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
Look up boost and PCV problems and see if the issues sound familiar.
I'm not sure why the problem just started appearing but my guess is that your driving habbits got more aggressive as you got used to the power. The boost may overtake the crank case pressure under hard driving at higher RPM's.
I'm not sure why the problem just started appearing but my guess is that your driving habbits got more aggressive as you got used to the power. The boost may overtake the crank case pressure under hard driving at higher RPM's.
Last edited by Rob 02; Jun 9, 2017 at 07:09 AM.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
If this doesn't solve the problem then you may have a more serious condition.
Internal problems caused by boost may be cracked pistons caused by detonation and possibly stretched head bolts. In that case a compression test would tell a story.
A cracked piston would leak more cylinder pressure into the crank case and out of the PCV tube. That doesn't necessarily sound like the problem to me though. If it were a head gasket then I would think that you would be loosing coolant and have PCM codes.
Internal problems caused by boost may be cracked pistons caused by detonation and possibly stretched head bolts. In that case a compression test would tell a story.
A cracked piston would leak more cylinder pressure into the crank case and out of the PCV tube. That doesn't necessarily sound like the problem to me though. If it were a head gasket then I would think that you would be loosing coolant and have PCM codes.
Last edited by Rob 02; Jun 9, 2017 at 07:23 AM.
Thread Starter
Racer
Joined: Nov 2015
Posts: 408
Likes: 5
From: New York
Thanks Rob, I will first try and do something with the pcv tonight and see if that helps then ill do a compression or a leak down test. Appreciate the help. Im hoping its not an engine issue because i really dont want to deal with swapping the engine or rebuilding this one all summer.
Pro
Joined: Feb 2013
Posts: 535
Likes: 92
From: Raleigh NC
As mentioned above, you'll likely want to do a compression test. I developed a similar issue at the track back in Nov. It was pressurizing the crankcase and pushing oil out of the dipstick tube. It was also puffing smoke from the oil filler. For me, it ended up being a broken #7 piston. (cracked the ringlands).
All of my cylinders were at 200-210psi compression, except #7 at 90psi. I followed that test with a cylinder leak down test. Had 50% leakage on that cylinder, and I could hear the air going into the crankcase.
Hope yours is something minor!
All of my cylinders were at 200-210psi compression, except #7 at 90psi. I followed that test with a cylinder leak down test. Had 50% leakage on that cylinder, and I could hear the air going into the crankcase.
Hope yours is something minor!
Safety Car
Joined: Mar 2016
Posts: 3,534
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From: Atlantic Beach FL.
Boost is getting into the crank case through the hose at the valve cover. You have a line going from the throttle body that T's off and one end goes to the valve cover with no valve anywhere between.
If you can blow air into the valley cover tube then there is a problem there too.
If you can blow air into the valley cover tube then there is a problem there too.
Last edited by Rob 02; Jun 9, 2017 at 11:46 AM.