Jump to content
SAU Community

Recommended Posts

Dear all,

I need your help and your opinions, it would be greatly appreciating if you could as I don't know what to do no more...:blink:

Where should i start,

Well I've owned my car for the past 2 years now and had no problems with it what so ever until this year!

I had purchased an RB25 NEO turbo and asked chasers motorworks to put it on for me. Everthing wnet swell until i had purchased a boost contoroller and boosted it to about 12psi, after a while like say about 2 months it made a very strange noise like a whining noise in early rpms and goes away when boost kicks in. I assumed it stuffed up... But after a while blue smoke had come out of no where?!! So i straight changed the oil but still blue smoke... Chasers then told me my bearings were gone, so i bought a replacement RB20 for GTS4 to swap with but also asked them to look at the turbo to see if there were any problems with it and they mentioned that nothing was wrong with it...

So when they finished the job it was running smoothly with major serviced done to it...

AND now its come to the time that its happened again and this time i put thicker oil and still no GOOD...

What do you guys reckon it is? Does the turbo have to do with anything because ever since i put that turbo it all started going down hill with my car.... What is the best suggestion to what i should do now???

Also are BC coilovers good? or should i go for TEINs? as all my coilovers are leaking and one is seized :)

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/
Share on other sites

from what i have read on other forums BC coilovers are good. tein are also good. i know that the teins give a nice ride and aren't very rough. not sure about the BC ones.

as for the smoke, sounds like it could be one of a few things. more than likely going to be the oil seal on the turbo. don't know if they are replaceable or not. don't think they are, but i don't really know too much about that sort of thing. there are other possibilities of what it could be, but if you have put in a second motor and it still does it then it is more than likely the turbo.

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5251290
Share on other sites

from what i have read on other forums BC coilovers are good. tein are also good. i know that the teins give a nice ride and aren't very rough. not sure about the BC ones.

as for the smoke, sounds like it could be one of a few things. more than likely going to be the oil seal on the turbo. don't know if they are replaceable or not. don't think they are, but i don't really know too much about that sort of thing. there are other possibilities of what it could be, but if you have put in a second motor and it still does it then it is more than likely the turbo.

They pretty much put the same turbo that was already on my other motor, It must be the turbo.... Well i hope because i reckon it'll get worse again if i don't replace soon... It burns oil pretty quick...

Do you what oil pressure it has to sit on? On a cold start it sits on 4 and when warm sits on the line before 4... Is this normal?

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5252093
Share on other sites

hey dude,

12psi is the supposed safe limit of the r34 turbo. plenty of people quickly turn to the turbo when oil fires from the back, ie +1 to turbo

I don't understand what you're trying to say? This turbo apparantly come with nylon type compressor wheels... maybe they are not meant to last long in high boost? I don't know, all i know is this turbo is stuffing up my engine... Too me i really hate polluted cars especially when its mine...

Does anyone live around the western suburbs of Melbourne... If so what mechanic would you recommend to go and I'm definatly not going back to Chasers Motorworks...

Thanks guys...

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5252938
Share on other sites

the nylon compressor wheel has nothing to do with what galois is saying. the ceramic exhaust wheel on the other hand does. these often fail once the boost has been wound up above 12psi, however that is when they are run at that boost on the standard engine they were designed for. since you have the r34 turbo on an rb20 it isn't quite so much of an issue.

the turbo itself won't really be damaging the engine as it is the turbo that it most likely to be stuffed. the smoke is more than likely being caused by the oil seal inside the turbo no sealing properly and allowing oil to enter the engine and burn. it may be the rear seal that is leaking though and that won't have any oil entering the engine, the smoke will just be caused by the heat of the exhaust burning off the oil. to work out which it is, pull off one of the intercooler pipes (preferably the one from the turbo to the intercooler) and look for oil. if you see oil in the pipe then the turbo is the problem.

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5253322
Share on other sites

couldn't have worded it better myself mad (literally haha). r34 (and apparently s2 r33 turbo's as well) are 5-7 psi stock and unlike nice flexible steel ones do not cope well with boost above 12 psi. there are quite a few cases on these forums of people picking r34 turbo parts out of their cat lol. 12psi is on the edge of the efficiency range of the turbo anyways (ie: 16 psi generates little more hp than 12psi).

listen to mad, his advice has steered a lot of us in the right direction many times

hope it works out mate

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5253375
Share on other sites

Thanks a lot guys, i'll have a look tomorrow morning... If i cannot find anything i might remove it and send it out for repairs or possibly a rebuild but who knows what it might be... Hopefully nothing too major...

Thanks heaps for your help, i'll let you guys know what happens...

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5254419
Share on other sites

couldn't have worded it better myself mad (literally haha). r34 (and apparently s2 r33 turbo's as well) are 5-7 psi stock and unlike nice flexible steel ones do not cope well with boost above 12 psi. there are quite a few cases on these forums of people picking r34 turbo parts out of their cat lol. 12psi is on the edge of the efficiency range of the turbo anyways (ie: 16 psi generates little more hp than 12psi).

listen to mad, his advice has steered a lot of us in the right direction many times

hope it works out mate

the r32 and s1 r33 turbos suffer the same problems as the s2 r33 and r34 turbos as they all have ceramic exhaust wheels and that is what lets go.

that said, i ran my r33 at 14psi for a long time and never had an issue with the turbo.

as for the 16psi vs 12psi, a mate of mine did this on the dyno and made about 20kw more on back to back runs, but 16psi is getting to the limit of what the stock turbo will efficiently flow. the only real reason why people think that they run out of puff there is because of misinformation on the internet. what is safe to run on the stock turbo without the turbo stuffing up, and when the turbo stops making power are, in the case of the skyline turbos, 2 different things. if the stock turbos had steel wheels everyone would be running 15psi on them like they do on the sr20's.

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5254824
Share on other sites

the r32 and s1 r33 turbos suffer the same problems as the s2 r33 and r34 turbos as they all have ceramic exhaust wheels and that is what lets go.

that said, i ran my r33 at 14psi for a long time and never had an issue with the turbo.

as for the 16psi vs 12psi, a mate of mine did this on the dyno and made about 20kw more on back to back runs, but 16psi is getting to the limit of what the stock turbo will efficiently flow. the only real reason why people think that they run out of puff there is because of misinformation on the internet. what is safe to run on the stock turbo without the turbo stuffing up, and when the turbo stops making power are, in the case of the skyline turbos, 2 different things. if the stock turbos had steel wheels everyone would be running 15psi on them like they do on the sr20's.

Hey buddy,

Thanks for the advice it really helped out. I removed the intercooler pipes and found loads of oil in the pipes... I knew it was the turbo all along, I swear i ask chasers to do something for me and they don't even listen to me... When the engine was getting swapped i specifically asked them to make sure had a look at the turbo but no they didn't... Can't even find decent mechanics around these days...

Thanks mad for your help, much appreciated... Im gonna get into it and get it fixed

Link to comment
https://www.sau.com.au/forums/topic/321911-engine-problems/#findComment-5257050
Share on other sites

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

    • Well, I can recommend the partial AV system translation CD I ordered from Car Audio Workshop in NZ. Whilst it didn't address the date issue, it has conveniently translated on-screen menu items into English, and now allows the GPS-received time to be offset in hours rather than minutes, so I can display Eastern Australian time accurately ( and bump it by another hour when daylight savings starts ).
    • Yuh, if it's 45°C outside, my car is driving in it.
    • I'd be curious to hear more. Otherwise, have you driven a modern x-trail? I wonder how it compares. Here in Australia they are/were popular for rentals and fleet vehicles. I have been in some and my impression was they are bad. But, this may have been very different in the 2000s at a good trim level. Twenty years is plenty of time to make the model worse. I do very much agree with the 2 silver cars in the garage approach. But, not driving because it's too hot would not leave a lot of time in the year for many Australians. I don't think you need to worry too much unless the car has actual issues with overheating. 
    • Back again. I returned to Japan in Jul/Aug to spend time with the car on my birthday and remind myself what all the sacrifice and compromise is for. It happened to line up with the monthly morning meet in Okutama, which I have been wanting to go to for a long time. It's a unique event at a unique spot with really rare, interesting, and quirky cars. It's where all the oldheads and OGs gather. The nighttime scene at DKF certainly has its place and should be experienced if you're into cars, but there's too much bad attention and negativity around it now. IMO the better time is Sunday morning at DKF or Okutama; it's more chill and relaxed. I'm glad I was finally able to go, but not sure it's worth the drive from all the way from Nagoya immediately the day before, unless I was already staying in Tokyo for the days right before the meet, because you have to wake up quite early to make it in time. Funnily enough though I didn't drive the car all that much this trip because it was just too damn hot. While there were zero issues and running temps were nominal and the A/C was strong, RBs already run crazy hot as it is. Sure, it took it all like a champ but something about driving these cars in the ridiculous heat/humidity bothers me and makes me feel like I'm asking too much of it. I'm just me being weird and treating the car like a living thing with feelings; I'm mechanically sympathetic to a fault. Instead I was mainly driving something else around - a KX4(silver) 2001 X-Trail GT, that I acquired in May. There's a few different flavors to choose from with Xs, but visually it's the Nissan version of the Honda CR-V. Mechanically it's a whole different story as this, being the top-trim GT, has an SR20VET mated to a four-speed auto and full-time AWD! It was a very affordable buy in exceptional condition inside and out, with very low mileage...only 48k kms. Most likely it was owned by an older person who kept it garaged and well-maintained, so I'm really happy with how it all worked out. It literally needs zero attention at the moment, albeit except for some minor visual touch-ups. I wanted something quirky, interesting, and practical and for sure it handily delivers on all three of those aspects. I was immediately able to utilize the cargo and passenger capacity to its full extent. It's a lot of fun to drive and is quite punchy through 1st and 2nd. It's very unassuming -in the twisty bits it's a lot more composed than one would think at a glance- and it'll be even better once I get better tires on it(yes, it's an SUV but still a little boat-y for my liking). So...now I have two golden-era Nissans in silver. One sports car and one that does everything else; the perfect two-car solution I think👍 The rest of the trip...I was able to turn my stressed brain off and enjoy it, although I didn't quite get to do as much as I thought. I did some interesting things, met some interesting people, and happened into some interesting situations however, that's all for another post though only if people really want to know. Project-wise, I went back to Mine's again to discuss more plans and am hoping to wrap that up real soon; keep watching this space if that interests you. Additionally, while working in the tormenting sweatbox that is the warehouse, I was able to organize most of the myriad of parts that my friend is storing for me along with the cars, and the 34 has a nice little spot carved out for it: And since it can get so stupid hot in there, that made it all the more easy -after I was standing there looking at the car and said 'f**k it'- to finally remove all the damn gauges that have mostly been an eyesore all this time. Huzzah. The heat basically makes the adhesive backing on the gauge mounts more pliable to work with, so it was far less stressful getting this done. I didn't fully clean it up or chase the wiring though; that will happen once I have the car in closer possession. Another major reason to remove all that stuff is to give people less reasons to get in my car and steal s**t while it's being exported/imported when/if the time comes, which leads us to my next point... ...and that is even though it's time in Japan is technically almost up since it's a November car and the X would be coming in March, I'm still not entirely sure where my life and career is headed; I don't really know what the future looks like and where I'm going to end up. I feel there's a great deal of uncertainty with me and as a result of that, it feels like I'm at a crossroads moreso now than any point in my life thus far and there are some choices I need to make. Yes, I've had some years to consider things and prepare myself, however too much has happened in that time to maintain confidence and everything feels so up in the air; tenuous one might say. Simply put, there's just too much nonsense going on right now from multiple vectors. Admittedly, I'm struggling to stay in the game and keep my eyes on the prize. So much so in fact, that very recently I came the closest I ever have before to calling it quits outright; selling everything and moving on and not looking back. The astute among you will pick up on key subtext within this paragraph. In the meantime I've still managed to slowly acquire some final bits for the car, but it feels nice knowing there's not much left to get and I'm almost across that finish line; I have almost everything I'll ever want for my interpretation and expression on what it is I think an R34 should be. 'til later.
    • Thanks for that, hadn’t used my brain enough to think about that. 
×
×
  • Create New...