neorazz Posted November 16, 2006 Share Posted November 16, 2006 i bought my 280zx (only 84K miles) it ran ok for two weeks even with the fuel leak im still working on fixing then one night driving home the turbo just made a horrible noise like a pop can was stuck in it i let up of the throttle and pushed it back and yopu could hear the turbo sound like it was going 40K rpm then it was normal now when i start the car it sounds like a marble being rolled around in a coffee can my guess by the sound of it is that the shaft fell out of the bearing if that is possible it sounds like the impeller is just sppinning on metal and when it goes fast enough it bounces the odd thing is it still half works i have vacume and noise at idle if i rev it will go to 0 on the gauge but never into boost now before the noise it would go to about hlfway between 0 and 7 boost does it sound like it's time to replace the turbo ? can these be rebuilt if the shaft came loose also these are a t3 correct is there enought room to hull out the inside and put in the t4 parts or are they using a diffrent housing there is a shop about 30 minutes from here that rebuilds turbos and if i have to pull it off i want to make it better or replace it what vehicles whould have a bolt on turbo that would work here? any ($low cost$ the better) suggestions greatly apprecated Quote Link to comment Share on other sites More sharing options...
zguy36 Posted November 17, 2006 Share Posted November 17, 2006 pull off the connecting tube that goes between the air flow meter and the turbo. Look inside the turbo and feel the shaft for play, or in your case look for metal chunks. If pieces of your turbo are coming apart, then that is going to enter your engine and do more damage. A turbo is a lot cheaper than a whole engine. Quote Link to comment Share on other sites More sharing options...
nienberg.11 Posted November 18, 2006 Share Posted November 18, 2006 Yeah your compressor wheel is hitting its housing when you hear those noises. You will definitely have aluminum chunks and more than likely a nice puddle of oil in the pipe zguy mentioned. If you were only able to hit 3 or 4 psi then the bearings were shot from the start. By the way, where is this shop that does turbo rebuilds? I spend a lot of time near Lodi and West Salem so it might be close enough to be of use to me. Quote Link to comment Share on other sites More sharing options...
neorazz Posted November 19, 2006 Author Share Posted November 19, 2006 ohio diesel injection service 42 w myrtle ave youngstown ohio 44507 it's just up the hill south of downtown yougstown on the right if your coming from downtown on market street if your coming from the drag strip you could follow main right thru town Quote Link to comment Share on other sites More sharing options...
neorazz Posted November 19, 2006 Author Share Posted November 19, 2006 as for how much boost my gauge reads in mmhg so it was running at 3-4 mmhg im going to look and see what that translates into in psi my beetle turbo read in bar and psi so i wasn't sure how that translates edit found this http://www.lenntech.com/unit-conversion-calculator/pressure.htm soas best as i can figure maybe about 5 psi at best but at the time i was blaming the problem on leaky fuel injectors i found a cross refrence for nissan turbos here http://www.completeturboservice.com/documents/autolist.pdf i have a turbo on it 's way in unknown condition on this list it the I4420-P9002 this list says it's the same model but a diffrent part # it's off a 85-87 300zx i think that was before the design change right this should be the one with the water cooling correct ? and should bolt on (i sure hope) Quote Link to comment Share on other sites More sharing options...
neorazz Posted November 30, 2006 Author Share Posted November 30, 2006 so i got the turbo it is the 85 t3 with the single carbon encapsulated seal im in the process of rebuilding it but in the mean time i got under the hood and worked at taking out the old turbo (goal being to switch them at the same time) ... now i know why it sounded like a ball brearing rolling around in a coffee can. the compressor wheel lock nut is gone !!! the compressor wheel was just spinning on the shaft loose ! theres oil everywhere and i havent found the nut yet but on a test i did on the dismantled turbo theres no way it could fit thru the compressor wheel without snapping a blade off so hopefully it will appear as i contine to work on this the compressor looks to be pretty bent up but intact (knocks on wood) hope no stray metal chunks got sucked into the motor pictures of the carnage Quote Link to comment Share on other sites More sharing options...
gjc5500 Posted November 30, 2006 Share Posted November 30, 2006 ouch. Looks like your seals/bearings are shot Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.