Z uses same piston rings as used in 2.5 engine?
09-17-2006, 11:47 AM
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Z uses same piston rings as used in 2.5 engine?
I'm wondering if anyone here might have information on that. I realize they are different engines, V6 vs inline 4, but I'm wondering if they have similar cylinders and use the same rings.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
09-17-2006, 04:25 PM
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Originally Posted by Brocken
I'm wondering if anyone here might have information on that. I realize they are different engines, V6 vs inline 4, but I'm wondering if they have similar cylinders and use the same rings.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
09-17-2006, 04:38 PM
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Originally Posted by Brocken
I'm wondering if anyone here might have information on that. I realize they are different engines, V6 vs inline 4, but I'm wondering if they have similar cylinders and use the same rings.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
The reason I ask is because there was a recal on something like 80k Nissans with the 2.5 engine because they were losing oil from bad piston rings. And I'm having a similar problem on my Z.
and the answer to that is no.
09-18-2006, 06:22 AM
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I know there have been years of Nissan engines with no problems. But I've read that between Feb and May of this year there was a manuf. problem with rings that has caused oil consumption. Nissan had to recall 80k Sentras and Altimas w/ the QR25. There were 17 cases of engine fire as a result of the low oil. These are extreme cases, of course, but there's still a problem.
i guess it's the luck of the draw. Happen to get the exception to Nissan's usually quality product.
i guess it's the luck of the draw. Happen to get the exception to Nissan's usually quality product.
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09-18-2006, 11:07 AM
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The problem with the QR, lies in it's short rod/stroke ratio. This puts a lot of sidewall loading on the piston, and makes it hard for the rings to stay seated at higher RPM. Also, Nissan has been experimenting with different ring tension in the QR over the past few years, to try and get this problem solved. They haven't succeeded yet.
With that said, the VQ doesn't have this problem, as it has a much better rod/stroke ratio than the QR25DE.. and it uses a much better ring.
Travis
With that said, the VQ doesn't have this problem, as it has a much better rod/stroke ratio than the QR25DE.. and it uses a much better ring.
Travis
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