Jump to content
SAU Community

Rb25Neo Blown Turbo?

picklesRs4

By picklesRs4,
in Engines & Forced Induction

 Share

Recommended Posts

picklesRs4 Community Regular

picklesRs4

Posted
Posted

hi there, i have a "00 rsfour stagea with the rb25NEO and i am trying to figure out wether i've blown my piston rings or turbo.

i've searched but havent been able to find anything about this so if theres a thread about this please just send me a link or tell me where to look.

now, i was driving along the freeway at around 130km/h and doing a few pulls and playing around with the gears and spooling the turbo up as it's my first turbo car and had only driven it from where i bought it so far. as i pulled of the freeway and stopped at an intersection without any warning the car just starts blowing smoke and ran rough as anything and just felt like it was stalling and starting up again so i limped it downhill to a carpark and shut it off. when i started it i held the revs around 3,000rpm and it blew smoke like crazy but didnt feel like it was misfiring at all, but as soon as the revs dropped below 2,500rpm it would completely drop like it was stalling and starting again and i couldnt bring the revs back up.

i have the turbo off and just played around with it and there is a bit of play in the shaft and when i spin the the blades i can see oil coming down the blades from inside the turbo.

so i really need help with this before i fork out money for a turbo or rings.

any help is appreciated

Link to comment
https://www.sau.com.au/forums/topic/427036-rb25neo-blown-turbo/
Share on other sites
jase_c Collaborator

jase_c

Posted
Posted

you guys don't think if he did a seal in the turbo it would put the oil into the air and into the cylinders/plugs and it would smoke and run rough? My R33 did the smoke/run like a pig thing when my fuel pump shat itself and it leaned out and destroyed the ring lands on the pistons(amongst other things) but that was white smoke, what colour smoke was yours?

picklesRs4 Community Regular

picklesRs4

Posted
  • Author
Posted

you guys don't think if he did a seal in the turbo it would put the oil into the air and into the cylinders/plugs and it would smoke and run rough? My R33 did the smoke/run like a pig thing when my fuel pump shat itself and it leaned out and destroyed the ring lands on the pistons(amongst other things) but that was white smoke, what colour smoke was yours?

cheers guys for the other ideas, havent even looked at the cooler yet, but when i took the turbo out one of the cooler pipes had oil all around it. and my fuel was on empty pretty much so i could've done something to the pump

picklesRs4 Community Regular

picklesRs4

Posted
  • Author
Posted

you guys don't think if he did a seal in the turbo it would put the oil into the air and into the cylinders/plugs and it would smoke and run rough? My R33 did the smoke/run like a pig thing when my fuel pump shat itself and it leaned out and destroyed the ring lands on the pistons(amongst other things) but that was white smoke, what colour smoke was yours?

also it was blue smoke pouring out the exhaust

picklesRs4 Community Regular

picklesRs4

Posted
  • Author
Posted

yea had the cooler pipe off for a while and cleaned it up when i did. but all through the cold side and into the throttle body there was a fair bit of oil so im hoping its the turbo, if it was seals the oil would be on the echaust side of the turbo and not through the intake? that make sense or am i just rambling like the rb noob i am? :P

ido09s Mentor

ido09s

Posted
Posted

Is there bucket loads of oil or just residue?

Your blowby vents back into the intake on stock cars and does cause the whole intake to look rather grubby over time.

If you were mopping a litlre of oil out of the cooler pipes i would plug up the oil feed and return to the turbo and do a comp test to make sure the engine is ok. If its only a whole stack of gunk stuck to the sides of the pipework i would put my cash on it being a turbo.

How wet is the turbine wheel of the turbo? is it soaked with oil?

picklesRs4 Community Regular

picklesRs4

Posted
  • Author
Posted

turbine was clean but i also didnt get the turbo off for a few days but just spinning it in my hand i had oil coming down the blades. and it looks pretty gumky but not litres at all. it didnt drip out of the pipes or anything.

im gonna try get a new turbo first get that back together then do a comp test as im getting a bit lost with all the parts in my garage.

hy_rpm Proficient

hy_rpm

Posted
Posted

I would say you just blew a cooler hose off somewhere

Cause if the turbo blew an oil seal it wouldn't idle rough but just blow smoke and if the turbine wheel was dry wont be a turbo seal as oil won't dry up

And a light film of oil in the intake of the turbo is normal blow by

picklesRs4 Community Regular

picklesRs4

Posted
  • Author
Posted

i think the smoke was caused by the turbo seal (just going with the general advice i've been getting). not saying your wrong by any means because im not really in a position to doubt anybody haha. comp test definately if it keeps smoking up im just really hoping it is the turbo

I would say you just blew a cooler hose off somewhere
Cause if the turbo blew an oil seal it wouldn't idle rough but just blow smoke and if the turbine wheel was dry wont be a turbo seal as oil won't dry up
And a light film of oil in the intake of the turbo is normal blow by

mungy Experienced

mungy

Posted
Posted

Come on guys really? It would never blow blue smoke unless there is OIL IN THE COMBUSTION CHAMBER........ A blown cooler pipe will NOT cause oil to pour into the cylinders, only a few things could cause the problem stated and judging by the description it sounds like a blown piston, however u start with the cheap stuff,

Pull out the plugs first, look at the condition of the plugs, if the are covered in oil it will confirm you have oil getting into the engine before the intake manifold, if only one or two plugs are covered n oil then it an internal issue localised to those cylinders. If you hav an exploded plug then its lookin bad for the motor, Next do a compression test, if all cylinders come up good its more likely to be turbo or valve stem seals, start with those simple checks then let us kno what results you get

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • soviet_merlin
      Duncan's V37.......race car?

      By soviet_merlin · Posted

      Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • Murray_Calavera
      Jacks that fit under GTR lips that can reach the subframe?

      By Murray_Calavera · Posted

      My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Duncan
      Chris' Toyota Mark ii JZX110

      By Duncan · Posted

      Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
    • Duncan
      Jacks that fit under GTR lips that can reach the subframe?

      By Duncan · Posted

      BTW I measured the jack I have, it is 70mm at the saddle but you only have about 700 until it returns to 150mm high at the cylinder so it is good but no magic bullet.
×
×
  • Create New...