Jump to content
SAU Community

Recommended Posts

I have a R33 which is pretty much stock. It runs the standard turbo with the standard intake piping. I've noticed that it is leaking oil from the location indicated with my awesome arrow. Can someone tell me why it would be leaking oil from there please?

post-46752-0-49633500-1410149958_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/448393-intake-pipe-oil-leaking/
Share on other sites

probably best to throw up a photo of your engine bay mate because its very hard to diagnose the problem when its not actually your car, this way we can see how you've plumbed back hoses and oil breather pipes and stuff like that.

The photo you put up shows the oil breather hose being plumed into the plenum which I wouldn't recommend based on personal experience where that can cause blow by pressure in the crank case. or perhaps negative pressure or some shit like that, yeah just throw up a pic of your engine bay.

Cheers - Dan

I dont know RB25s but its probably crankcase blowby fumes carrying oil mist into the intake where it can condense (which is normal unless its excessive). Is the leak point downstream from the turbo? If so you'll probably have a small boost leak. Try to get it to seal. The factory hose clamps are only supposed to be single use, and get pretty tired if they've been used a few times - might need to replace it to get a strong grip. Or maybe the rubber is perished a bit.

Any blue smoke from the exhaust? If so it could be turbo oil seal, otherwise just a bit of condensed blowby. In the second pic the bottom black hose is probably turbo to intercooler and the top is intercooler to manifold. You could check your intercooler to see how much oil its got isn it and degrease/clean it while its out. If the amount of oil in the intake track is a problem and its blowby related, you could get a catch can, or some mesh/foam in the rocker covers (not sure if this is a thing on RB25s, RB26 has mesh standard, and you can get 3 pass foam upgrades).

what he said ^ either get a new hose to stop the leak... or get a catch can if your running a bit of boost, it can cause blow-by which forces oil into your turbo, I personally don't like the idea, and I usually use some sort of catch can thing.

- Dan

  • Like 1
  • 2 weeks later...

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

    • Wife wanted basket things in the wardrobe in our temporary house. Thought about ripping our the wardrobe and fitting the entire IKEA set, but it's a temporary house and we want to move in a few years. So IKEA advertises this as a 50cm unit, however the actually basket and rails measure 46cm wide. Only issue was depth, IKEA stuff is quite deep, where as the builder special junk is super shallow at less than 40cm. Send it, chopped the rails, then offset the mounting holes, job done, happy wife, less shit scattered all over the bedroom. Did the same to the other side too. Also drove the Skyline shit box today, dropped off oil at Supercheap Auto. I didn't realise they only now take max 2x bottles per visit. I visited 2x Supercheap Autos.  
    • I've seen similar actually in my situation. You never know what tables are attempted to be used when the car thinks it's -99C or +200C. The fail state is not usually that extreme but you know what I mean - it was in my case though! This is where being able to read all the sensors is useful cause you see this stuff really quickly.
    • The above is very important. However as long as you keep timing relatively low, it's plausible to make your own knock ears and plausible to learn to tune with a modern ECU that can do wideband O2 correction like a boost controller. I mean if you only have one viable road to even drive the car on, learning to tinker to this level may be worth doing given you can't do much else with the car...?
    • I find the fact that the rear plate has to be bent inwards at the rear not so bad: but the front is just awful: It's like come on. (these are my very old, now retired/turned in plates) TBH it is a lot of money to fix a minor issue, the fact I said "I'll never really spend the money on doing this" is why people ended up buying them as a gift for a 'car guy' who can be hard to shop for.. for car guy things.
    • I just bent the ends of my premo plates. It even went through Regency like that after the engine conversion and the inspector (a great bloke!) just squinted his eyes and said "I didn't see that". Plates, and how they look, are just something that have zero importance to me.
×
×
  • Create New...