Troubleshooting "Oil Smoke": Is it excessive oil consumption from turbo, or....?
#1
Troubleshooting "Oil Smoke": Is it excessive oil consumption from turbo, or....?
I have recently got my b18 bottom end rebuilt due to cracked pistons. Went with wesico pistons and eagle rods. Since the rebuild I began to have oil consumption and smoke out of the exhaust. So I brought the car back to shop that I had paid to rebuild it. They did a compression test and leak down test. The results are #1-230 #2-215 #3-220 #4-200. The stated the leak down test showed ok and meant the car is smoking burning oil not because of their work. Other information is the intercooler does have excessive oil in it and plugs #1 And #3 are oil fouled.
Now as for smoke color and when it smokes. The smoke is normally a white bluish color except when heavily accelerating will become a darker black color. I know first thing that comes to my mind is turbo seals. Since I do not know how long the turbo has been on the car. I bought the car with it already turboed. But before the pistons cracked it never smoked with that turbo. Also from some research when the turbo does go it will smoke constantly and thick smoke. Mine smokes mostly at acceleration from a complete stop up until I am at a constant speed. Once at a constant speed it will not be visible smoke until I accelerate more in which the smoke gets denser. The motor consumes a quart every 200 miles and seems to be getting worse as time goes on.
I have removed the filter from the turbo on the outlet side. There is not any excessive oil. Small traces but not terrible. I was told maybe the oil catch can I have only had 1 breather and may need one with 2 breathers for the crankshaft pressure. Or valve seals and guides. Or a new turbo. I'm not sure but the shop won't help me any further without a big bill and another few months in the shop. TIA.
Now as for smoke color and when it smokes. The smoke is normally a white bluish color except when heavily accelerating will become a darker black color. I know first thing that comes to my mind is turbo seals. Since I do not know how long the turbo has been on the car. I bought the car with it already turboed. But before the pistons cracked it never smoked with that turbo. Also from some research when the turbo does go it will smoke constantly and thick smoke. Mine smokes mostly at acceleration from a complete stop up until I am at a constant speed. Once at a constant speed it will not be visible smoke until I accelerate more in which the smoke gets denser. The motor consumes a quart every 200 miles and seems to be getting worse as time goes on.
I have removed the filter from the turbo on the outlet side. There is not any excessive oil. Small traces but not terrible. I was told maybe the oil catch can I have only had 1 breather and may need one with 2 breathers for the crankshaft pressure. Or valve seals and guides. Or a new turbo. I'm not sure but the shop won't help me any further without a big bill and another few months in the shop. TIA.
#2
Honda-Tech Member
re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
Sounds like either piston rings or turbo seals to me. If it was the turbo you would likely find oil somewhere on/in the exhaust housing side.
Edit: Also I'm not sure where you are in the break-in process on this engine, but I wouldn't be particularly satisfied with a new engine having a 30psi difference between two cylinders.
Edit: Also I'm not sure where you are in the break-in process on this engine, but I wouldn't be particularly satisfied with a new engine having a 30psi difference between two cylinders.
#3
re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
I am 2 Oil changes in and still on the base tune with only 5 psi boost. If it was turbo seals or rings, why are only the 2 cylinders plugs be fouled but not the other 2. The shop refuses to believe it' rings and won't help me out.
#4
Honda-Tech Member
re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
Turbo seal oil smoke is usually related to oil pressure. It will be worst on cold starts, or high rpm and load when oil pressure is high. I've dealt with this for a number of years on a worn turbo, but never with the amount of consumption that you describe. The turbo would have some significant damage to burn that amount I would imagine. And you mention having an inline oil filter so it's unlikely that metal fragments made it into the turbo when you blew up your pistons.
#5
re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
If it is rings. I guess I would have to pay to have it basicly rebuilt all over again. How could they have messed up that bad. The shop swears up and down that they set the rings on the dyno and did everything correctly. I'm still confused on how I am only fouling 2 plugs.
#7
Honda-Tech Member
re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
If it is rings. I guess I would have to pay to have it basicly rebuilt all over again. How could they have messed up that bad. The shop swears up and down that they set the rings on the dyno and did everything correctly. I'm still confused on how I am only fouling 2 plugs.
And yes I agree the rings are definitely the most likely suspect here. Again, I find it suspect that there is a 30 psi difference between cylinder 4 and cylinder 1. That is not the mark of a meticulously assembled engine.
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#8
Re: Troubleshooting "Oil Smoke: Is it excessive oil consumption from turbo, or....?
Anywho.. I'd be all over the shop like white on rice to figure out wtf is going on. If they are doing nothing but brushing you off, that's a HUGE red flag that they fucked something up... If they did not, they'd be all over it..
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