Blowing Oil
#1
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I finally got my fresh JDM 1.8 BP to start the other day, only to be welcomed by a lot of white smoke.
I know before every comes running saying im burning coolant im not. I checked the dip stick, all the oil is clean, and i have checked the radiator for any oil bubbles none to be found.
I did a compression test on a cold engine and these were my results.
1. 137 2. 145 3. 130 4. 135
After all the smoked cleared, i looked under the car to find oil everywhere under the car by the downpipe.
The oil looked fresh, but burn so im guessing its coming from the Turbo, which is a Godspeed GT2870. It has a 4AN SS oil feed coming from the back of the block, 2 6an SS water lines, and a 10 AN SS drain. Along with a restrictor feed on the top of the turbo
I was reading that either my seals are blown which im not convinced since this is a brand new turbo. OR my oil return is constricting flow and the oil is backing up into the turbo and being blown out. The fins on the cold side are dry and oil free.
Here are some pictures of the oil return lines.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110613-blowing-oil-hrzz30ll.jpg?dateline=1398299713)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110614-blowing-oil-6lje33jl.jpg?dateline=1398299713)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110615-blowing-oil-unex7ynl.jpg?dateline=1398299713)
Now questions, since im leaking so much does that mean the seals are bad and need to be replaced even if i make a new drain line?
I know before every comes running saying im burning coolant im not. I checked the dip stick, all the oil is clean, and i have checked the radiator for any oil bubbles none to be found.
I did a compression test on a cold engine and these were my results.
1. 137 2. 145 3. 130 4. 135
After all the smoked cleared, i looked under the car to find oil everywhere under the car by the downpipe.
The oil looked fresh, but burn so im guessing its coming from the Turbo, which is a Godspeed GT2870. It has a 4AN SS oil feed coming from the back of the block, 2 6an SS water lines, and a 10 AN SS drain. Along with a restrictor feed on the top of the turbo
I was reading that either my seals are blown which im not convinced since this is a brand new turbo. OR my oil return is constricting flow and the oil is backing up into the turbo and being blown out. The fins on the cold side are dry and oil free.
Here are some pictures of the oil return lines.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110613-blowing-oil-hrzz30ll.jpg?dateline=1398299713)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110614-blowing-oil-6lje33jl.jpg?dateline=1398299713)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/110615-blowing-oil-unex7ynl.jpg?dateline=1398299713)
Now questions, since im leaking so much does that mean the seals are bad and need to be replaced even if i make a new drain line?
![vash](https://www.miataturbo.net/images/smilies/vash.gif)
#6
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1.5 mm restrictor
What i was thinking is that the oil isnt draining properly and blowing out of the exhaust. Or my turbo seals are blown. I have a rebuild kit for the turbo so its not a real big issue.
#7
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https://www.miataturbo.net/diy-turbo...ild-kit-73912/
It may be from a failing turbo, it may be from the fact that you just started it after sitting for a long time?
Try out this little test like in the video from the linked thread and make a video of the smoking or better pics of the leak.
It may be from a failing turbo, it may be from the fact that you just started it after sitting for a long time?
Try out this little test like in the video from the linked thread and make a video of the smoking or better pics of the leak.
#8
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https://www.miataturbo.net/diy-turbo...ild-kit-73912/
It may be from a failing turbo, it may be from the fact that you just started it after sitting for a long time?
Try out this little test like in the video from the linked thread and make a video of the smoking or better pics of the leak.
It may be from a failing turbo, it may be from the fact that you just started it after sitting for a long time?
Try out this little test like in the video from the linked thread and make a video of the smoking or better pics of the leak.
Im doing some research and im starting to think more and more that my drain line is the cause of this. I highly doubt a brand new turbo seals would be bad.
#14
Boost Czar
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That's like exactly the thing I'd expect from a motor from Japan that came shipped with bad rings. JDM motors are just bad bad bad. it's a gamble that typically doesn't pay off. They are abused to hell and then pulled and sold here for cheap.
I would have strongly suggested to get a motor from a better source...
I would have strongly suggested to get a motor from a better source...
#15
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In Japan they have all these motors for sale because government mandates inspections so stringent that nobody can pass after a certain mileage. Owners who know from the start that they are not going to pay for a full rebuild at that point do ZERO maintenance on the engine while they own it. Why bother? Oil change? What's that? You just (at most) dump more cheap as you can find oil into it if the level gets low.
Keith
Keith
#16
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In Japan they have all these motors for sale because government mandates inspections so stringent that nobody can pass after a certain mileage. Owners who know from the start that they are not going to pay for a full rebuild at that point do ZERO maintenance on the engine while they own it. Why bother? Oil change? What's that? You just (at most) dump more cheap as you can find oil into it if the level gets low.
Keith
Keith
#19
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I would be OK with a 2 year old Japanese car. A car with synthetic oil can handle 2 years and 20,000 miles without an oil change. Many cars come from the factory with synthetic now. Anything older than that avoid like the plague. Strange as it seems, the car most likely to have regular engine maintenance is one used by someone who street races, tracks their car, or drifts.
Keith
Keith