Jump to content
SAU Community

Recommended Posts

After putting the new turbos into the car, the oil dipstick is blowing out of the hole.

Before I put the new turbos in, I made sure the compression was OK and even in the engine (168psi when 171psi is the upper limit). Standard turbos, rebuilt to steel wheel and ball bearing specs.

I'm wondering whether the Exhaust Gas Recirculation system might be blocked - a look through Nissan Fast has me confused about where the valves are and what might be happening. The AAC valves also sem to have soemthing to do with this - buggered if I can figure it out.

Tuner reports the car is currently making about 170rwkw on 9psi boost, so I'd like to check that the crankcase ventlation system is OK before worrying about possible broken or rolled piston rings.

Could someone please give me an idea on how to check this part of the system, and what parts might be gunked up or blocked??

Cheers,

John

Pressure build up in the sump is proberly from worn piston rings, and on compression stroke air goes straight past them into sump and has to go out some were.... out the dipstick.

Are you loosing any oil ? blowing smoke from exhaust ?

If that's the case its rebuild time.

:P

Jun

Compression is 168. Can't see how it can be this high with badly worn or cracked rings.

Not using oil or smoke.

When turbos were stuffed there was a lot of gunk generated so I suspect a blocked PCV or some other part/tube around it that would normally take air from the sump and inject it into the inlets.

Where is the PCV and any other bits that could be the culprit? Is the PCV cleanable or replaceable? I can't find it in FAST or the manual. Personally I'm confused about the PCV vs AAC valve arrangement

Sounds like excessive blowby pressurising the sump. A dry comp test will not always show ringland damage in its initial stages, I'm with fats, but rather than retaining the dipstick with a spring run both breathers to atmosphere to relieve all pressure, start saving some $ and pull her when she really starts breathing.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • If that's the wiring from the factory, I'd be inspecting the loom everywhere.   Any signs of that anywhere else, and seriously, I'd get rid of the car ASAP before the electrical gremlins make it worthless, or it goes up in flames on its own. That is scary how that insulation is failing!
    • I should note too as I have all 4 wheel speed inputs to the emtron I now have the emtron controlling the attessa solenoid for 4wd/traction and launch control strategies. 
    • It works quite well with the adjustibility within each of the programs of the turbolamik. Essentially p1 is drive and lockup comes on like a normal driver.  But in program 7 I have customised it to not request the lockup clutch to engage until something like 6500/7 when slip was the lowest. 
    • Yep, I like that. The tags are only on the first post of a thread and we don't get huge numbers of new threads. Also, I plan to add some more report types and we could have a member report type like 'review tags' then members could flag if they thought a topic wasn't tagged correctly.  No way man, I dig the input. Thanks! 
    • It's a valid thought. There's not exactly that functionality already (when creating a thread) - that's where the OP can use/create any tag they want. We'd have to come up with a way for the user to request their tags get reviewed or something. Otherwise the mods would have to review every new post's tags (for those that have them, anyway). There's kind of that functionality already exists to some extent, post facto of starting the thread, where the OP or any other user could report the post to admins, and request that tags get reviewed. We could do this already, and any user could already have made such a request. To make it a part of the forum proper, it would require an initial and an ongoing education programme, so that people know that it's a thing. OP based tagging/request for review would also require at least some (probably most) of the user base to be told that it's a thing they can do. Both of these things probably wouldn't spread too far and/or get used very much. If it was the standard approach on a lot of different sites, then it might do, because people would be used to it. Prank's approach to this differs from my original thought, by leaning into tagging. Which is fine - it's possibly better than what I originally suggested. In fact, I just went to the R32 GTR wiring diagram thread and added tags, including "Library". That's probably a good way to use tags and the idea of a library. We just have to drag together an (organised!) index of threads or posts that have that tag. I have yet to do any of my own follow up by pursuing worthy threads and posts and reporting/marking/tagging them for the library, such as the @Sydneykid stuff I was talking about, and possibly any amount of @Lithium 's and others' posts. At least if I tag them Library, we'll have a start.   Back to @Wazmond's idea as it relates to @PranK's, we might have some sort of a list of tags that are already used to scrape for this library. I'm not entirely sure how that would be presented or used, particularly if it got long. But it's yet another idea!   cheers
×
×
  • Create New...