Turbo Troubles

[benefitx]

ok so i just got the turbo i ordered from another zilvia member...

the plate in the center housing reads

69F00

...i got it installed with my taka lines , .06 restrictor and everything...

took it for a test drive...

i have a closed wastegate (straight wastegate > nipple) and its only boosting 4psi...

WAIT , theres more...around 4k rpms i will hear this loud scraping sound , same when i let off the throttle....

this is the SAME noise i was hearing when my other turbo blew out...

oh and this turbo has a divider in the middle too...and looks exactly like my gt2871rs...

is a .06 too big for this?...really need to know assap , dont want to drive the car like this...

[steve shadows]

honestly from all your posts, I think you should be taking your car to a decent honest tuning shop (if there even are any left).

[Sileighty_85]

Holy Shit Balls Batman! Dude your 240 is possesed,

well if its making the scrappin noise go ahead and check for shaft play on the turbine.

If its making a scrappin whirly sounds only when spool up then the intake compressor is scrappin the houseing.

did you check the shaft play before install?

Cuz that pretty damn fast to blow a BB Turbo, unless it was already shit when you bought it.

[johngriff]

Or you have NO oil pressure.

And thats what killed the last two turbos.

Just a thought.

[daryl337]

yeah, possibly something in his lines causing these things to pop...

[Sileighty_85]

Or you have NO oil pressure.

And thats what killed the last two turbos.

Just a thought.

Yeah but his cam shafts would be squeakin pretty loud too, along with lifter tap

[benefitx]

it had no shaft play when i bought it...and it was making this sound when i first first drove it...

it has taka lines with a taka .06 restrictor...

the only thing i can think of is that its a s15 BB and it needs a .03 restrictor...

the scraping sound sounds more of a exhaust problem now...minor thing

but why only 3-4 psi??

[benefitx]

Yeah but his cam shafts would be squeakin pretty loud too, along with lifter tap

i do have lifter tap and im beginning to hear squeaking...wtf

ill take a video...

[Sileighty_85]

i do have lifter tap and im beginning to hear squeaking...wtf

ill take a video...

okay if you constant tapping and Cam Shafts Squeakin then your Oil Pump Crapped itself

[johngriff]

I said this in his first blown turbo thread.

Been on forums so long, I can ESP problems now.

[benefitx]

the original t25 , the oil hardline broke...so i replaced it with an ebay gt2871rs...it blew because i ran no restrictor and was backed up with oil

now this is a garrett t28 off an s14, 69F00 (isnt this dual BB??) with taka lines and a .06 restrictor, boosting only 3-4 psi on a closed wastegate, and i dont think the scraping is coming from the turbo

but on initial start up like the past 2 turbos , i can hear the turbo spooling really loud , sounds like supercharger but it dies down after 15 seconds...

can the engine still be saved if its the oil pump dying? i will replace it asap if so...

[benefitx]

video

http://video.google.com/videoplay?docid=-577520951704951667&hl=en

[benefitx]

i did clock the compressor side a little because the intake pipe was hitting my manifold...

is it possible the center housing did not seat correctly?

[johngriff]

NO.

msg length.

[benefitx]

well what do you think then...final answer = failing oil pump?

i really dont want another blown turbo or blown engine...i need to know if i should park the car or not...

[-=RS13=-]

LOL, no oil pressure, do you even have an oil pressure guage to check???

Motor is probably done, sounds like some light knocking at the very end.

[benefitx]

dont tell me that if you dont know what your talking about...

its valve tap , its very different from knocking, motor has acl race bearing and a cometic hg , new ...has been running good for almost 1000 miles now since the rebuild , just need the bleed the lifters


but i do hear the squeaking which i have never heard before until today...and i might be just paranoid but its having problems starting like the starter has to work extra hard to spin the motor...

the turbo isnt making that noise anymore sooo...

[Sileighty_85]

listening from your video it does sound like your oil pumps crappin out. I can hear the metal on metal rubbage from the Cam Shafts in the begining.

My friends made the same sound but alot worse.

Im really surprised you didnt replace the Oil Pump while you had the engine out. Its like 14 years old by now.

if you wanna try a ghetto way of check your Oil pump just disconnect your oil feed line to the turbo Disconnect your CAS!! and turn your engine over for like 10-15 seconds to see if your Pump is working. if your getting oil then you might have a blocked oil passage in the head.

Its definatly oil starvation for one of your Cam Shafts if not the whole head.

But! You mentioned its getting harder to start sooo... Its your call on doing it this way. I dont wanna tell you to do this and end up locking up your engine

But we drove my friends SR around the block with a bad oil pump, and it didnt lock up.....

But really im about 99% sure its your oil pump.

[CylonFrakker]

Don't drive it around the block. The oil pump is either dead or a blocked passage. Replace and repair.

[Z U L8R]

:( that sux man

we have an oil pressure tester at my shop, basically you unscrew the oil pressure sending unit and screw in the tester then start the car and check it. how many times have you changed your oil since rebuild?? did you put a new oil pump in it or re use your old one? what oil weight are you running?

[benefitx]

i didnt rebuild the engine , i bought the engine from another person...

it has a fresh bottom end , acl race bearings, cometic hg , arp headstuds and arp main studs....the oil pump was not changed...

im going to go buy a oil pressure gauge today

ive changed the oil atleast 5 times within 1000 miles...and coolant 5 times

[benefitx]

ok well. i took off the intake elbow , there is about a little little little bit of play , maybe half a mm...

i ran it open wastegate (no line connected to wastegate) and it boosts to 10 fine (i let off throttle before it boost anymore , stock injectors)..

but on a local 240sx forum , another guy with the same setup said he has the same buzzing noise that i have...

this is my only concern...im goign to buy a oil psi gauge and a boost controller today

[seven.62]

dude i think you need to stop risking it. If you think there is something wrong, it probably is. I really dont think you should really keep pushing it to see if something is going to go. I know i would much rather buy a 200 dollar oil pump replace it and find out is something much easier, than to completely ruin the engine then wish you would have just got an cheap ass oil pump. Do yourself a favor and dont be dumb about it. Buy the oil pressure tester and hook it up between the sensor start it, if it doesnt show anything or not enough( refer to fsm) immediatly turn it off and inspect how much damage was sustained, then replace as many parts as needed. John knows what he's talking about. you'll thank yourself later.

[benefitx]

yeah im going to do that today

[rb25drag]

Sounds like you have run that engine around the block under boost more than once or twice with that noise. If its and oil pump it would have already toasted that motor. It only takes seconds not mins with no oil.

If it is oil pump and starving one side of your head. Which ever side it is the cam has to be screwed by now. I personaly would pull that valve cover and check both cams and caps for internal damage.

You said you twisted the housing on the turbo to get it to line up? Are you sure when you to the housing loose you didnt accendently bend a blade and now its slightly rubbing making that noise?

[benefitx]

i only loosened the bolts , just enough to twist the housing...

i really dont think its the oil pump going out because the noise comes and goes, that squeaking only happened during initial start up...i havent heard it since i made the video (also the engine hadnt been ran in almsot 2 weeks)

i have driven the car on highways at 4k + rpms for over 20-30 minutes...

[rb25drag]

If it was the oil pump that motor would have been toast already withing 1 min.

ok first you really need to get an oil pressure guage and get an accurate reading. Thats step one.

Step two: I would inspect the turbo very good. Look in both sides and make sure there is no marks in the housing just to be double sure they didnt rub some how.

If the turbo inspects ok, Then take the valve cover off and inspect the cams make sure there is nothing loos/hurt/scratched etc.

If everything there is ok. then your going to have to start taking things off the motor that turns and visually and physically inspecting them. Something has to be rubbing/scraping and its prob the one thing you have looked over.

[benefitx]

yea so, i just drove it to DOWNTOWN and back...(30 minute drive, all highway)...

steady 3500 rpm's 5th gear...

not a single problem ,

last time i did a trip like that with my old sr, motor blew immediately...


BUT, after maybe 5 minutes of idling ill hear that stupid squeaking, and the scraping sound (might be exhaust related)

so im going to buy the oil psi gauge , RAS and bleed all my lifters.

[Sileighty_85]

its sounds like your not getting enough oil at idle.
check the oil pan and make sure its not dented in that retangular area.
Your Oil Pick up is right above it.

[benefitx]

nope , oil pan is perfect...literally

[codyace]

To me it just simply sounds like a noisy valvetrain. I would potentially look at removing the valve cover, aswell as the upper chain guide. I would also inspect my chain tensioner, and or possibly replace it with the newer FWD ones that don't loose tension overnight.

If your oil pump was shot, you would be broken don already. You may have an oil pressure issue (as we've all hasehd out already) but will never knw until you intall the gauge. Remember, the block is BSPT, so get the appropriate adapter for the block.


the original t25 , the oil hardline broke...so i replaced it with an ebay gt2871rs...it blew because i ran no restrictor and was backed up with oil

You do realize you can push oil past turbo seals and stil have an 'good' turbo right?


but on initial start up like the past 2 turbos , i can hear the turbo spooling really loud , sounds like supercharger but it dies down after 15 seconds...

Nomal in some turbo cars.

can the engine still be saved if its the oil pump dying? i will replace it asap if so...

IF the oil pump was dead (which it's not) you would have been sittng along the freeway some time ago.

okay if you constant tapping and Cam Shafts Squeakin then your Oil Pump Crapped itself

listening from your video it does sound like your oil pumps crappin out. I can hear the metal on metal rubbage from the Cam Shafts in the begining.

I've got a petty good sound sytem on th computer, and I didn't hear any of that. Do you have some sort of super hearing? Pleas, refrain from advice unless you really know.

Im really surprised you didnt replace the Oil Pump while you had the engine out. Its like 14 years old by now.

Granted I do the same, but at the same momemnt, I've never heard of one going bad. I have a personal friend with over 380,000 miles on his stock B13 and has zero oil pressure issues.

and turn your engine over for like 10-15 seconds to see if your Pump is working. if your getting oil then you might have a blocked oil passage in the head.

Still doesn't tell you pressure. On my Altima KA-T I had awful oil pressure, yet still had oil come out.


But really im about 99% sure its your oil pump.

LOL. You've not blown many engine up then ave you?

its sounds like your not getting enough oil at idle.
check the oil pan and make sure its not dented in that retangular area.
Your Oil Pick up is right above it.

Good advice, but again, the car would be toast already.

[benefitx]

yeah, thats why i said , last time i made a trip to downtown my engine fried immediately , THAT was a oil pressure issue...

im installing RAS today, i know my lifters are noisy...

going to put some engine assembly lube on the cams and bleed the lifters...lets see what happens

i think ive figured out what the buzzing noise is also..


thanks alot codyace and johngriff , sileighty85 and anyone else i missed...appreciate it as always..

[Sileighty_85]

To me it just simply sounds like a noisy valvetrain. I would potentially look at removing the valve cover, aswell as the upper chain guide. I would also inspect my chain tensioner, and or possibly replace it with the newer FWD ones that don't loose tension overnight.

Its noisy cuz the HLA's do not have sufficient oil pressure (or full of air)
SR's dont have that U.C.G problem like the KA's, ive never heard of having to remove one.
Im still rockin my OEM chain tensioner


If your oil pump was shot, you would be broken don already. You may have an oil pressure issue (as we've all hasehd out already) but will never knw until you intall the gauge. Remember, the block is BSPT, so get the appropriate adapter for the block.


its is possible to move enough oil durring higher RPM's but not enough durring idle



Nomal in some turbo cars.


Ive never heard a turbo squeal at idle



I've got a petty good sound sytem on th computer, and I didn't hear any of that. Do you have some sort of super hearing? Pleas, refrain from advice unless you really know.

listen to the begining and when the RPM's drop really low you will hear it squeak. Ive been working on SR's for 3 Years Now, I broke down my SR to the crank and shipped it home and rebuilt my SR by myself from the crank up with all new performance parts, so I know the SR inside and out. So I know what im talking about. Dont judge me by these gay little boxes.


Granted I do the same, but at the same momemnt, I've never heard of one going bad. I have a personal friend with over 380,000 miles on his stock B13 and has zero oil pressure issues.

Ive heard many stories and talked to lots of ppl saying their oil pump went out on their SR's it all depends on who owned the Engine before they got it. And We Americans over there in Japan tear these engines UP. One of my buddies got one and the oil looks like it was never changed i think it still had the OEM filter on it. Oil caked and clumped in the valve train it was horrible. Alot of Americans dont care cuz they just sell the car in two years (now three) if they dont wreck it first.
Your compareing apples and oranges here with Honda and Nissan.
Of course if you take care of it it will last.


LOL. You've not blown many engine up then ave you?


not mine, my friends, so i know the symptoms and the sounds it makes.

[benefitx]

i know the sounds also , ive had knock 3 times in the past...also rebuilt an SR from crank up...but i know a noisy lifter and knock from any other sound an SR makes...and its definetly air in the lifters but i cant explain the squeaking nor the buzzing at 4k (from turbo area)