Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Best Test pipes?

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Old Jun 20, 2006 | 12:16 AM
  #46  
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Originally Posted by Klumzyee
is this consumption on +05 6MTs?
I had talked to some of the techs at the Infiniti dealership I trust my car with during my last visit there to get some warranty work done and they did confirm to me that there is a problem with some 2005's over consuming engine oil. It went as far as one owner needing a new engine for his car. It still did not cure the problem and he had the dealership buy the car back and the owner instead bought a 2006 G coupe.
 
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Old Jun 20, 2006 | 12:23 AM
  #47  
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I've never been one to baby an engine during break in. As far as I'm concerned - if it was built right to begin with - it shouldn't break after I buy it. After-all - have you EVER test driven a car and drove it as you should during a break in period???? NOT!!! AND isn't that usually the car you end up buying?

Rick
 
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Old Jun 20, 2006 | 12:25 AM
  #48  
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Originally Posted by Serengettisandg
I have nearly burnt 2 litres in 1000km, I am doing the oil consumption test for infiniti.
Interesting. Keep us up to date on this, if you could.

I ran across this photo of a converter next to a test pipe and wondered what the object circled in red was. It looks like it might be some kind of mounting point or something. Curious that the test pipe doesn't have one.



I assume that the other opening is for the o2 sensor.
 
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Old Jun 20, 2006 | 12:34 AM
  #49  
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Originally Posted by Demonteverde
I had talked to some of the techs at the Infiniti dealership I trust my car with during my last visit there to get some warranty work done and they did confirm to me that there is a problem with some 2005's over consuming engine oil. It went as far as one owner needing a new engine for his car. It still did not cure the problem and he had the dealership buy the car back and the owner instead bought a 2006 G coupe.
Hard to believe that replacing the engine didn't cure the oil consumption problem. Also strange that the owner bought another G after all that trouble.

I have heard of others having oil comsumption problems with the G35's and have heard of other having their engines replaced.
 
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Old Jun 20, 2006 | 12:37 AM
  #50  
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Originally Posted by _jb
I assume that the other opening is for the o2 sensor.
Isn't that the support bracket mount?

Most testpipes don't have them as they break anyways. Testpipes are much lighter and the brackets aren't really needed anyways.

Rick
 
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Old Jun 20, 2006 | 01:48 AM
  #51  
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Originally Posted by ISMSOLUTIONS
I've never been one to baby an engine during break in. As far as I'm concerned - if it was built right to begin with - it shouldn't break after I buy it. After-all - have you EVER test driven a car and drove it as you should during a break in period???? NOT!!! AND isn't that usually the car you end up buying?

Rick
Well I often buy cars without a test drive.
I agree with you to some extent but look around at newbie posts about break-in. I mod on the Evo forum and I frequent here and I see a lot of break-in questions including ones like "I went over 5000 RPMs during break-in, did I do damage?"
There are a lot of people who do break-in like this.

And like you said you have quite a few mods so you can't really count your car as part of the norm.
 
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Old Jun 20, 2006 | 02:10 AM
  #52  
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Originally Posted by _jb
Interesting. Keep us up to date on this, if you could.

I ran across this photo of a converter next to a test pipe and wondered what the object circled in red was. It looks like it might be some kind of mounting point or something. Curious that the test pipe doesn't have one.



I assume that the other opening is for the o2 sensor.
The object circled in red is for the support bracket that goes between the stock oem cats. The crawford and RT cats can still use the bracket as well...
 
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Old Jun 20, 2006 | 02:48 AM
  #53  
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APS uses the bracket on their test pipes. Without the bracket you risk cracking a weld. Its happened to a few on this site and my350z.
 
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Old Jun 20, 2006 | 10:53 AM
  #54  
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Originally Posted by Foo_G
ho many miles/kms do you have on your G?

I have just over 15k miles on mine and no oil issues yet... knock on wood.
28,000kms.

Originally Posted by timzcat
I would like to know how all of these engines with consumption issues were broken in from new. The biggest issue for any oil consumption is ring sealing.
Of course the seating of the compression rings is the single most important thng in a breakin. Infiniti is telling everyone to take it easy on break-in, which is quite honestly a bad idea. You should not be running the thing to redline but you should not be easy on it.
When you hone the cylinder you are creating a cross-hatch pattern to allow oil to be held on the cylinder wall for lubrication. The ill effect of honing the cylinder is the creation of peaks and valleys from the cutting action. The peaks are the issue here. On initial break-in it is the rings job to remove the peaks from the cylinder as cleanly as possible. The best way to accomplish this is to achieve as much ring to wall pressure as possible. If you are not aware the pressure in the cylinder is what pushes the ring out against the wall. FI cars are much easier to break-in because you have added pressure to the cylinder on top of the static pressure. Load on the engine is the only way to increase this pressure.
My car was broken in fairly hard... it wasn't babied for the first 800 miles or whatever they say. A ring will be seated long before you even hit 250 miles... you should give it a few good heat cycles to expand the rings and seat them. My compression rings are great, the test infiniti did showed 100-104% across them, but it is an oil control ring issue I am sure for reasons I stated in my last post.
 
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Old Jun 20, 2006 | 10:58 AM
  #55  
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Originally Posted by _jb
Interesting. Keep us up to date on this, if you could.

I ran across this photo of a converter next to a test pipe and wondered what the object circled in red was. It looks like it might be some kind of mounting point or something. Curious that the test pipe doesn't have one.

I assume that the other opening is for the o2 sensor.
I will keep you guys posted... I started a new thread a while back, but no one cared so I quit giving updates.

That is the mounting tab for the catalytic convertor brace. The brace bolts to the bottom side of the tranny and supports the cats(which if you have felt one you will know why) Even still when bolted in they should be held on secure enough to the manifolds to not require the brace, I think it was just a cover their *** issue. My Strup test pipes weigh under 5lbs, there is no way they need a brace to avoid cracking a weld.
 
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Old Jun 20, 2006 | 01:28 PM
  #56  
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Originally Posted by Demonteverde
The object circled in red is for the support bracket that goes between the stock oem cats. The crawford and RT cats can still use the bracket as well...
Thanks, Ian.

I thought it looked like some sort of support bracket. It looks like there is a rubber grommet to dampen vibration in the mount. I wasn't sure and thought I'd post the pic.
 
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Old Jun 20, 2006 | 01:36 PM
  #57  
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Originally Posted by Serengettisandg
I will keep you guys posted... I started a new thread a while back, but no one cared so I quit giving updates.
I didn't want to hijack your thread, so I started a new one. I was waiting for you to post the results of taking your car back to the dealer after removing the MREV, which you now have done. I am still subscribed to your thread and my thread on this subject.

So now we have all hijacked "Virgin G35's" thread... I think that shows how concerned everyone is with this test pipe/Burning oil issue and that it will not fade away.

Originally Posted by Serengettisandg
That is the mounting tab for the catalytic convertor brace. The brace bolts to the bottom side of the tranny and supports the cats(which if you have felt one you will know why) Even still when bolted in they should be held on secure enough to the manifolds to not require the brace, I think it was just a cover their *** issue. My Strup test pipes weigh under 5lbs, there is no way they need a brace to avoid cracking a weld.
Thanks for the info. I was originally thinking of replacing my Cats with test pipes. I think I'll hold off until this is resolved.
 
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Old Jun 20, 2006 | 02:51 PM
  #58  
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Originally Posted by _jb
I didn't want to hijack your thread, so I started a new one. I was waiting for you to post the results of taking your car back to the dealer after removing the MREV, which you now have done. I am still subscribed to your thread and my thread on this subject.

So now we have all hijacked "Virgin G35's" thread... I think that shows how concerned everyone is with this test pipe/Burning oil issue and that it will not fade away.

Thanks for the info. I was originally thinking of replacing my Cats with test pipes. I think I'll hold off until this is resolved.
I would have never cared if you got involved in my thread, it was there to help me out and others I was just surprised no one cared about the issue as it seems pretty huge to me. I would hold off on test pipes or high flow cats on your car.
 
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Old Jun 20, 2006 | 05:42 PM
  #59  
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Sorry virginG35 for the thread Hijack. Let us know if you want us to move out.

I regards to tracking oil consumption is the dipstick is a reliable instrument for measuring the level. The reason I ask is it seems to have a lot of bends in it.


Thanks.
 
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Old Jun 21, 2006 | 10:22 AM
  #60  
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Originally Posted by Foo_G
Sorry virginG35 for the thread Hijack. Let us know if you want us to move out.

I regards to tracking oil consumption is the dipstick is a reliable instrument for measuring the level. The reason I ask is it seems to have a lot of bends in it.


Thanks.
It only has bends to get it out around the engine crap. Once you pull it out a bit it is basically a normal dipstick, just they have a funky handle. Let it sit for about 20-30min after you drive it and then check. Pretty accurate
 
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