Quiche2192
03-31-2019, 12:08 PM
My redtop has been burning oil only at idle and I've been going through some steps to try and fix it. But I thought I'd post about it here and see if anyone has some input for my specific case.
First of all, I looked up everything I could find about the issue and I found that this is usually related to a failing turbo. I still have the T25, and I checked the play in the turbo which is the only test I have performed on the turbo so far. It has about 1-2 mm of end play which I think is too much. So turbo will probably be changed out.
BUT
I also wanted to check engine compression just to see where it's at right now and this is what has me stumped.
I have 160 psi all around which is fine. But when I opened up cylinder 4, I found a lot of oil in the combustion chamber. I unscrewed the spark plug and it was covered in oil. There was so much oil that some spilled into the spark plug well.
So this what I am having issues with. What is causing all this oil to end up in just the fourth combustion chamber? The compression seems fine. I realize that oil can help seal the rings, fooling you into thinking the chamber has more compression than it actually does, but is that likely?
So what I wonder is, is the bad turbo causing the chamber to fill up with oil? I don't think that's likely. So then is it a bad pcv system? Mine's stock, but one part of the pcv system that I realized isn't quite ideal is that, from the t-fitting on the right side of the valve cover when looking at the engine from the front of the car, the line that is supposed to go to the intake pipe, right before the turbo, actually just has a small air filter on it. It's not connected to anything, it just goes to atmosphere through a filter. Could that be causing oil to pool up in the fourth cylinder? I can't seem to attach pics. I keeps saying upload of file failed...
So the steps I want to take are:
1. Change the pcv valve
2. Connect the T-fitting to the intake pipe right before the turbo (does anyone know of any intake pipes that have a fitting for this?)
I'll do this first and see how things go. If it still smokes after that but there's no oil in the combustion chamber, I can decide to replace the turbo. If there is oil, I'll need to rebuild.
What I wanna ask is, does anyone have any tips on how to make this process a bit easier? Am I thinking wrong about any of this? How do you recommend I run the PCV system from the T-fitting? Is the PCV valve a known failure point? And does a bad PCV system let oil pool in the combustion chamber?
First of all, I looked up everything I could find about the issue and I found that this is usually related to a failing turbo. I still have the T25, and I checked the play in the turbo which is the only test I have performed on the turbo so far. It has about 1-2 mm of end play which I think is too much. So turbo will probably be changed out.
BUT
I also wanted to check engine compression just to see where it's at right now and this is what has me stumped.
I have 160 psi all around which is fine. But when I opened up cylinder 4, I found a lot of oil in the combustion chamber. I unscrewed the spark plug and it was covered in oil. There was so much oil that some spilled into the spark plug well.
So this what I am having issues with. What is causing all this oil to end up in just the fourth combustion chamber? The compression seems fine. I realize that oil can help seal the rings, fooling you into thinking the chamber has more compression than it actually does, but is that likely?
So what I wonder is, is the bad turbo causing the chamber to fill up with oil? I don't think that's likely. So then is it a bad pcv system? Mine's stock, but one part of the pcv system that I realized isn't quite ideal is that, from the t-fitting on the right side of the valve cover when looking at the engine from the front of the car, the line that is supposed to go to the intake pipe, right before the turbo, actually just has a small air filter on it. It's not connected to anything, it just goes to atmosphere through a filter. Could that be causing oil to pool up in the fourth cylinder? I can't seem to attach pics. I keeps saying upload of file failed...
So the steps I want to take are:
1. Change the pcv valve
2. Connect the T-fitting to the intake pipe right before the turbo (does anyone know of any intake pipes that have a fitting for this?)
I'll do this first and see how things go. If it still smokes after that but there's no oil in the combustion chamber, I can decide to replace the turbo. If there is oil, I'll need to rebuild.
What I wanna ask is, does anyone have any tips on how to make this process a bit easier? Am I thinking wrong about any of this? How do you recommend I run the PCV system from the T-fitting? Is the PCV valve a known failure point? And does a bad PCV system let oil pool in the combustion chamber?