notes 1. Cam: TFS-30602001
2. I will never use or recommend using rocker threads to change valve springs again on 'typical' truck casting aluminum heads for LS engines because they seem 'fragile' now that I've managed to damage one even while doing everything properly.
3. It was my first new turbo, after wrenching for 20 years I never had a new one, so I didn't know the compressor nut would rust. Borg Warner does NOT oil it from the factory so mine rusted immediately before I could even realize it needed oil. So even though its kind of a joke and doesn't hurt anything... seriously do be aware you should lubricate the compressor nut of a turbo right out of the box or it will turn nasty brown rusty!
The small trail of oil from the pcv fresh air tube is typical on engines with functioning WOT pcv systems and turbochargers (SR20/2JZ/RB26/etc), it indicates that small amount of oil mist is being pulled from the crankcase at WOT which tells me that the system is working properly. I would not install a 'catch device' here because that small amount of oil is not going to do any harm, will not get very far, and will help keep the compressor hardware from oxidizing.
The quantity collected is typical for 10-20k miles on OEM turbo engines, and usually I clean/wash mine every 25k miles to prevent significant buildup (on every turbo engine, do this, sr20/2jz/RB/4g/etc... i.e. use this type of WOT pcv tube and keep it clean if the engine is WET SUMP). The factory uses convoluted intake tube to trap the residue which leads to buildup over the course of 100-150k miles for people that don't clean their intake tubes, but I never let mine go that long.
If I did not see any slight oil residue or If I saw an enormous puddle of oil, either way would indicate there was a serious problem. Not seeing any oil residue after 20k miles or more could mean the system is not working properly at Wide open throttle. In many ways, seeing that sort of "wavy" thinned out appearance on the side of the aluminum intake tube was an enormous relief to me. Because I simply selected the location at random, attached the hose and assumed it was working right from the start without having any way to 'see' until I saw that mark and got confirmation.
Read more about what happened with the rocker threads on one of the build threads:
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