I recently did the spacer and I noticed that in one of the ports I'm getting blow by. All 5 other ones are clean and spotless. Are the G35's known to have any issues with the piston rings and seals?

2005 G35 Coupe

Thanks.

 

If it's a 6MT then it's known to have oil consumption. I don't know about blow by all that much.

 

I don't think it any of those. I think you are seeing the oil vapor residue frome the PVC system. Is it in the back?

 

I think if he's looking at the lower plenum and sees more oil residue out of a single runner that cylinder may be an issue.

 

I don't see how it will "blow back" into the lower plenum. Only if it was backfireing. It's got to be coming from the vent tube on the intake.

 

Negative I took of the upper and lower plenum, which then exposed the intake manifold itself. The 2nd bay from the firewall side is the one with the residue. I have the picture on my phone I will need to download it and then post it here. If its not blow by then it may very well be a shotty seal.

 

Alright well here it is.... notice the yellowing of the 2nd port in the manifold from the firewall. At first I thought it was blow-by, but it doesn't make any sense. I'm thinking a seal maybe fried. As of right now I'm not having any oil consumption issues. So far what has gone in has for the most part come out. I have a 5at not a 6mt.

 

The injector washes [cleans] the lower part of runner, above that PCV and intake dirt [non oem filter] mix with EGR to form oily mess.

 

Doesn't that "runner" turn to the right (diriver side) and is first inline with the airflow right after the MAF sensor? That would put it first inline to recieve the oil vapor from the PVC valve.

 

you need a Flux capacitor!

 

Judging from your avitar, you gots the "*** Capacity" goin' on!

 

I'll make the flux capacitor and a turbonator my next mod, but right now I am more concerned if a piston ring is shot or if its less serious. If it does end up being blow-by I will do a catch can.