Well it is finally time to see what is wrong with my motor. Ending of last summer I was tunning my car with my new Nismo FPR and while in the process of doing some test pulls blew my motor (I have an Inline 6 RB25DET). I gave it a pull and noticed an dramatic power loss followed by smoke pouring out my exhaust. I then took it back to my friends house (a few blocks away) and opened the hook to see oil sprayed on the side of my strut tower (shot out from my HKS BOV). We then did a compression check on it and it was as followed....first 5 were about 110psi and cylinder #6 was only 25psi. We looked into the cylinders through the spark plug wholes and noticed quite a bit of oil in the cylinders, especially #6. I took the intake piping and intercooler off and it was drenched in oil. A few days later we start it again and start to notice that it is making a sputtering/ knocking kind of noise (not sure if it was really knocking, to me it sounded like more of a compression sputtering noise). I am not sure what the problem is and wanted your guys opinion on what it could be. I am going to do a leak-down on it at the end of this week to narrow it down and hopefully find out what the problem is for sure. Just wanted to see what you guys thought before I did that.

When it blew I noticed a dramatic power loss and it seemed like blueish/white smoke. I did not notice if the water temp was climbing or not, since his place was only two blocks away. Before this had happened I have always noticed oil coming out of the turbo, so I am sure that is where the oil came from and probably totally gave out when I turned up the boost to 14psi on that test run. I took my top section of the intake manifold off a few months back and noticed that there were puddles of oil down the gallies.

I am really hoping that it could be the head gasket, but something is telling me since the compression test was an even 110 (almost all the way through) except #6 (25psi) that it is probably the rings or ring lands...or can a head gasket have that same compression test result?.

Let me know what you guys are thinking if you could.

Thanks,
Zach

 

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