ok so heres my problem, the other day i pulled the plugs and all 4 were fouled. i put a light down the plug hole and noticed oil on all 4 pistons, #4 was the worst.
i have not done a leak down test yet as i do not own a tester or an air compressor. and i have noticed oil leaking out betweek the CHAR and the exhaust housing and the Vband on the downpipe, i am also running a restrictor so i dont think its the turbo.
Now my motor only has 262 miles on it so far, could this be a cuase of the rings not seating yet, or could this be from bad valve guides/seals.
i had the head milled, pressure tested, all new viton valve seals and 6EX valves were replace, and got a valve job. i did not get new vavle guides and the machine shop never said anything about them being bad, so they replaced all the valve seals. since oil is on all 4 cyl, would this be the cause of the valve seals or the block?

 

Slow down. You've put together 3 seperate problems in one annoying paragraph.

The idle issues and hot re-start issues you are having is from high under-hood temps causing injector/fuel rail heat soak. My setup does the same until you drive it for a minute or two. Sometimes all it may take is holding RPMS in the 1500-2000 range for about 30seconds to let the fuel cool off the injectors.

Are you positive you are seeing oil on the pistons and not unburnt fuel? Who built the motor? A friend? A professional shop? etc? All clearances checked before assembly? Do you have a build spec sheet (blueprint sheet) for the engine?

 

Sorry I edited the post , and yes I'm positive it's oil, I took a 3/8ths extension and stuck it down just to touch the top of the piston and pulled it back up and on all 4 it was oil.
The motor was built at M&M head service, the assembled the short block and the head, I put the rest together, head on to the block ect, they checked all the clearances and tolerances, I should have the sheet for everything with P2W clearance, bearing specs ill look for it.

 

So I was looking at the the sheet they had but it didn't have the P2W clearance written down just the ring gap sizes.

 

Do you have oil in the charge pipes, or just the exhaust side of things?

What motor do you have?

Honestly its all really a guessing game until you do a leak down test. You replaced alot of stuff, but something is def wrong. You need to do a leak down test to narrow things down. Have you contacted M & M about it yet?

What Do you have for Crankshaft ventalation? Is there oil in the intake manifold? Your not using factory PCV system are you?

 

Just the exhaust side. I just took the ex mani off and stuff and the exhaust side looks pretty wet on the turbo but it's like watery more than oily, also inside the head looking in it looks like there's condensation and it was on the wastegate as well, I stuck my finger in the exhaust ports and it disnt feel oily really just like watery I guess? If the turbo is the culprit it's u set warranty from precision like seriously I have 200 miles on it

 

Take some pictures... It should be very clear if its oil vs. condesation.

Regardless of the oil issues with the turbo (which seems to def be a issue) That isnt the culprit of you having excessive oil on each piston. That is unrelated...meaning you have more then one issue.

Who tuned the car? have you been driving for 200 miles with no tune? What EMS are you using. Also you didnt mention your means for crankshaft ventailation

 

Ex port #4 and piston 4



#3



#2



#1



Sorry for it being blurry

Turbo

 

Oh god no lol I had it tuned at te beginning of April at Slowmotion motorsports
It made 430whp and 322 wtq,
For a catch can I'm using prelude block fittings with 5/8ths hose going to a catch can.

 

Umm so my turbo is fuxked and I only have 200 miles on it and bought it brand new......


How does this happen?

 

I am so sorry to hear this sir. I hate to say it but I have heard from many people that Precision will not fix it for free and that they will probably just tell you that it was oil contamination. After hearing all the horror stories, this is why I will never buy a Precision turbo.

 

Yes I've heard it before too but I'm going to try and go through the vendor I purchased it from to see if he can help me out, this is some BS! I have no luck at all

 

Damn, that's not good. At least you weren't over taken by the compressor wheel like most people ! Good luck getting it sorted !

 

Yeah that's really weird for that to happen, and it's just the exhaust side intake is fine. But back on topic what could be the cause for all 4 cyl to have oil on the pistons

 

So something obviously went through the turbo for it to hit that wheel, and something is causing the oil on the pistons, could a piece of one of the valves chipped or broke and is making it leak the oil and also that piece to go through the turbo? Or a piece of somethig from the pistons? But it's weird because at WOT the car runs fine only problem I had was an idle issue so what could this be?

 

Its certainly mechanical damage (turbo)...Something definatly passed thru it.

Are you certain its oil on the pistons and not unburnt fuel? its too hard too tell from pics. When you had idle issues what was your a/f? Reason im asking cause if it was rich at idle or misfiring then you shut it off and are taking these pics it could very well be fuel there.

Turbo needs replacement, but for your motors sake you need to do a Compression test/ Leakdown. Were all just guessing at this point.

 

Yes it's defiantly oil and upon further inspection through exhaust ports I can tell some oil is comming from the valve seals, thy are brand new viton seals which I heard leak, but I still need to pull the intake mani to confirm this, if that shows nothing I'm just going to take he head off and inspect it and the short block, it takes no time for me to do this and I have too much time on my hands ha,
The only other thing I can think that would have past through would be a piece if a weld from the mani. Because there's no sign of the blades hitting the housing nor are there any metal shavings in it.

 

Not sure, but looks like its the oil rings.
The valve seals would have to leak a lot to get back down on the pistons like that without burning off right away.
The oil on your turbo is from the motor. If a valve chipped off and went through the turbo you would have zero compression and feel it for sure.

maybe your cylinders are out of round, or the ptw is way off, or the rings weren't installed right.

 

i had this same kind of problem with my motor come to find out the machine shop that built my head cracked the head when replacing the valve guides

 

yeah im honestly not sure whats going on becuase the other day he car was running perfectly fine, it starts up like it should and there was seriously no smoke at idle, i could kind of smell the oil burning in the cabin from the open DP but i thought it was still just the rings setting.
After i pull the head today i will know more, and if something internally is wrong that would have been caused my improper instalation im takking it back to the shop that did the work and B8tching at them.

 

Post some pictures after you remove the head. Good luck

 

I can not see the pictures because my work computer blocks them but if there was a foreign object that went through the turbo, Precision will not fix it for free. This really stinks sir.

 

yes i know this, but if it had to do with a bearing failure or something like that then they should replace it. But if someting did infact hit the wheel i really want to figure out what it was. Also if i send it in at least it wont be as much as buying a whole new turbo.

 

Almost every case that I have heard about Precision turbos, Precision will not own up even though it is their fault. Sometimes rebuilding cost just as much as a new turbo depending on what was damaged. Seriously though, good luck to you and don't give up if this is what you truly want to do and enjoy doing it.

 

Yeah precision is 100% NOT going to warrant that. its not there fault something passed thru it. You have to Figure out the root cause, if its the Machine shops error you need to speak with them. Dont even bother contacting precision unless you want them to rebuild it and pay out of pocket. Since you cant do a simple leakdown/compression test i would pull the head, hopefully its clear what happened at that point. Take pics.

That does not look anything like bearing failure. Its did not kiss the wall...that thing got chewed up. Thats from something passing thru it