help please blew 3 turbos in 3weeks

[sr22detman]

i need help i got an sr20det with a garrett t28 and for some reason they keep on blowing all the time and my boost is only at 11 psi and i have new steel braided lines all around but the new t28 turbo i put in blew in 3days do you guys know of anything that could cause this??

[nissan240sxkid]

are you using the correct oil restrictor fitting

[rican_nick]

to much oil pressure... as ^^ do u have the correct feed restrictor

[smelly240]

oil return might be kinked...

oil restrictor, return, or some oiling problem is usually the reason...

[johngriff]

are the cams scarred? Maybe you have low oil pressure.

[UNISA JECS]

Let me take a guess in the dark your running and aftermarket BOV because it makes cool noise but you dont know how it is suppost to be adjusted.

[Gjohnson7]

Dude, you need to give me one of those T28's.

[smelly240]

bov adjustment???!!!??? - that doesnt blow 3 turbos @ 11psi... i ran 18psi for a year with no bov and had no problems at all... shit - some bov's dont even have an adjustment.

its definately a oil problem.

[jackal264]

take the turbo's to a reputable turbo place and get them to dissassemble thme and diagnose the problem (or at least why they are blowing) i blew 3 t28's in 1 year and my local turbo place was able to tell me that they were getting clogged with metal filings.

step 1: take off your oil pan and check for metal. this could be leftover turbo metal/ballbearings

step 2: make sure there are absolutly NO dents in ur pan. the pickup in sr's is so damn close to the pan even a 1/4 inch dent can cause problems

step3: if there is no metal make sure you are getting enough oil pressure

if there is metal flush the engine with cheap oil like 3 or 4 times

step 4: as mentioned above by the other guys if you have enough oil and no metal in the pan it could be the oil restricter. make sure you get the right one. NOT the one supplied in say the taka turbo line kit. the hole on those restricters are to big you need a genuine turbo oil restricter which has basically a pinhole in it.

other then that i'm stumped

[UNISA JECS]

bov adjustment???!!!??? - that doesnt blow 3 turbos @ 11psi... i ran 18psi for a year with no bov and had no problems at all... shit - some bov's dont even have an adjustment.

its definately a oil problem.

Never heard of compressor surge have you, turbos dont like spinning up to 80,000 rpms with 7-11psi of boost, then all of a sudden you lift throttle, throttle plate closes, 7-11psi (or whatever your boosting) smacks into a shut door (throttle plate) and bounces off and has no where to go becasue someone eitehr adjusted teh BOV so tightly becasue it sounds really cool or just failed to install one in the first place, that it can only go one way and that way is in reverse back to the compression which by the way is still spinning asshole on fire fast and is then force to try and spin in reverse in a heart beat which in turn puts stupid force on the trust bearing assembly and kills yoru turbo rather quickly. I've seen alot of newbies to turbo'ed engines do this more than enough times. So yea you can kill a turbo real quick this way.

BTW im refffering to after market true type Blow-Off-Valves and not the factory type Nissan CBV Compressor-Bypass-Valves.

[smelly240]

dude - that doesnt blow turbos up! Esp not 3 of em -

i know how it works - and ur not gonna blow a turbo in 3 days because of 11psi compressor surging.

long term - yeah it might beat it up - but thats not his problem.

im sure there are other people here that have run no bov without blowing up a turbo...

[UNISA JECS]

im sure there are other people here that have run no bov without blowing up a turbo...

Who does that? lol

[Irukandji]

Sounds exagerated. Check your oil return line to make sure it flows freely and doesn't back up oil. That's what blew my first T25.

I ran no BOV at 10psi, and oil is what killed it.

[smelly240]

Who does that? lol

more people than you think...

[ll_EvOluTIoN]

yeah honestly a lot of ppl run no bov

[Gjohnson7]

yeah honestly a lot of ppl run no bov

That's what I was thinking.

[UNISA JECS]

My bad I had a brain fart I forgot where I was, I had to double check my URL, I stand corrected....lol

http://i167.photobucket.com/albums/u159/zilvia_album/macexpl.gif dot com.

[cotbu]

Blown? what do you mean? Is oil blowing out of it? Is it seized or it just won't boost anymore? In any case the first turbo should have been dismantled by now, what's the diagnosis? You tell us and we may be able to help with that. But now a bunch of speculation is Sho Ryu Ken aka all you get!

[yokotavia]

i've run no BOV for over 6 months now on my T28 @ .9Bar. still runnin strong,

bov is not the problem.

check your oil lines for kinks and make sure you have the correct restrictors if need be

[renegade_ewok]

That compressor surge isn't even real compressor surge: YouTube - True Compressor Surge (http://www.youtube.com/watch?v=nCj6Spwl1CU)

If you have the ability to, take it to a guy to diagnose what went wrong, which most likely is an oil issue. Who did you buy your turbos from, were they new or used?

[Z33dori]

Never heard of compressor surge have you, turbos dont like spinning up to 80,000 rpms with 7-11psi of boost, then all of a sudden you lift throttle, throttle plate closes, 7-11psi (or whatever your boosting) smacks into a shut door (throttle plate) and bounces off and has no where to go becasue someone eitehr adjusted teh BOV so tightly becasue it sounds really cool or just failed to install one in the first place, that it can only go one way and that way is in reverse back to the compression which by the way is still spinning asshole on fire fast and is then force to try and spin in reverse in a heart beat which in turn puts stupid force on the trust bearing assembly and kills yoru turbo rather quickly. I've seen alot of newbies to turbo'ed engines do this more than enough times. So yea you can kill a turbo real quick this way.

BTW im refffering to after market true type Blow-Off-Valves and not the factory type Nissan CBV Compressor-Bypass-Valves.


you def don't know what your talking about.

CS doesn't blow turbos at all... it will slowy shorten teh life of the turbo depending on how hard u drive your car... but it will rarely cause it to blow.

you need to go do some research....

[UNISA JECS]

I guess not....

[UNISA JECS]

Here, straight from Garrett, I think they might know a little something about turbo's:

TurboByGarrett.com - FAQ's (http://www.turbobygarrett.com/turbobygarrett/tech_center/faqs.html#t9)
http://i167.photobucket.com/albums/u159/zilvia_album/SP32-20080824-233105-1.gif

[UNISA JECS]

Compressor Surge:Typically, surge occurs immediately after the throttle plate is closed while the turbocharger is spinning rapidly, such as between shifts or when decelerating. During surge, air pressure increases between the throttle body and the compressor, which reduces the air flow at the compressor. If the air flow falls below a certain point, the compressor wheel (the impeller) looses its "grip" on the air. Consequently, the air in the compressor stops being propelled forward by the impeller and is simply spinning around with the wheel, which is still being rotated by the exhaust gas passing through the turbine section. When this happens, the pressure build-up at the discharge opening forces air back through the impeller causing a reversal of air flow through the compressor. As the back pressure eventually decreases, the impeller again begins to function properly and air flows out of the compressor in the correct direction. This sudden air-flow reversal in the compressor can occur several times and may be heard as a repetitive "WHEw Whew whew" noise if the surge is mild to a loud banging noise when surge is severe. Surge should be prevented at all costs because it not only slows the turbocharger wheels so that they must be spooled back up again but because it can be very damaging to the bushings or bearings and seals in the center section of the turbo.

[Irukandji]

I ran bov at 10psi with no bov, compressor surge was nothing compared to too much oil pressure with a backed up drain line.

[Z33dori]

wow you can copy and past

but that has nothing to prove against ppl who have exp with the matter.

there are tons of members on here who don't run BOV, and have never ran BOV. its all over the world.... yes they help alot.... but they will not be the main cause of your turbo failure ....

you'll understand when actually own a turbo car and gain exp in the matter....

[UNISA JECS]

lol....this guy....I had a B13 Sentra SE-R that has been turbo'ed for ~8 years total (4 of them by me) on the same turbo (stock T25) boosting 10psi daily, logged over 80,000 miles by me, then sold to my friend who still drives the car and it still runs like a champ on the same damn T25.

AND it ran a TMIC (top mount intercooler) for 4 years with me daily beaten up, damn thing still holds a 150psi compression accross the board. Had 155psi when I bought it.

I have owned more than a couple turbocharged cars all Nissans BTW, non of which have ever blown up or killed the turbo, not to mentioned I've done countless turbo swaps and tune ten with a gay SAFC and stock ECU combo (moved on to better things now), but still never blew one up.

[Forge_55b]

u see UNISA JECS.....you are saying from your experience with a bov you haven't blown a turbo, so that said, you saying that not having a bov causes a turbo to blow isn't really relevant since you haven't had first hand experience with that exact conclusion, at least from what you have said so far.....

anyhow 3 turbos that are brand new at 11psi blowing up? need more info after you check the oil return and oil line restrictor. also i would take apart the turbo to see exactly where it is failing so you can get a better idea of what is going on

[Irukandji]

wow you can copy and past

but that has nothing to prove against ppl who have exp with the matter.

there are tons of members on here who don't run BOV, and have never ran BOV. its all over the world.... yes they help alot.... but they will not be the main cause of your turbo failure ....

you'll understand when actually own a turbo car and gain exp in the matter....

UNISA JECS is one of the few members on here who actually knows what he is talking about.

I ran no bov because the car was only going to be a track car. No bov on a daily would be stupid. Don't believe everything you read on the internet, use some common sense.

[UNISA JECS]

Im not trying to prove anything, just putting good information out there, readers can decide for them selves what to do.

Its funny to me that every week it seems someone is always making a statement/or argument justifing doing things "the wrong way" or half ass way.

There should be a sub-forum called:

Jimmy Riggers and McGuivers (That 10% Viewing)
Exclusive forum for those members that just gotta go against the grain!
(Here, all you know-it-all's can discuss and make fun of stupid Nissan Engineers that just over engineer everything for the hell of it)

haha

[SoguRacing]

lol mcguiver..i loved that show! though i dont think i can make a bomb out of a paperclip and some rubber bands. i would second that thread lol

[UNISA JECS]

u see UNISA JECS.....you are saying from your experience with a bov you haven't blown a turbo, so that said, you saying that not having a bov causes a turbo to blow isn't really relevant since you haven't had first hand experience with that exact conclusion, at least from what you have said so far.....

anyhow 3 turbos that are brand new at 11psi blowing up? need more info after you check the oil return and oil line restrictor. also i would take apart the turbo to see exactly where it is failing so you can get a better idea of what is going on

I have worked on more turbo cars than I care to count, and I have seen my share of ghetto turbo setups with no BOV to, and incorrectly adjusted BOV. But whats makes that even worse is they paid good money for that nice looking BOV and it was adjusted incorrectly because the user didn't know better. I have seen with my own eyes what it does and im to smart to not run a BOV/CBV.

[UNISA JECS]

There's atleast 1 or 2 users in this thread that I could see frequenting my newly suggested sub-fourm haha

http://zilvia.net/f/tech-talk/176575-oil-coolant-feed-return-line-ka24det.html

[Forge_55b]

thats great that you have worked on SOOO many turbo cars UNISA, I don't think anyone is questioning that. what everyone is questioning is the relevancy of zero bov causing a turbo to blow prematurely. now unless you can say you have first hand experience of a brand new t28 boosting only 11psi "blowing" which the thread creator I think needs to clarify, I think that there are many more reasons that would take priority to putting on a BOV and assuming the problem solved.

I'm not trying to attack you statements, just trying to point out that you saying, "Let me take a guess in the dark your running and aftermarket BOV because it makes cool noise but you dont know how it is suppost to be adjusted." sounded like you being arrogant and assuming this guy just put on a BOV to sound cool. Not really helping em out in the first place.

[UNISA JECS]

Your right, but he never answered the question so all anyone can do is guess.

BUT who the hell does have experince with "blowing a 3 day old T28", now, who knows it probably was due to bad lubrication or restricted in the return line.

[smelly240]

I said that in january... :D

oil return might be kinked...

oil restrictor, return, or some oiling problem is usually the reason...

[Z33dori]

UNISA JECS is one of the few members on here who actually knows what he is talking about.

I ran no bov because the car was only going to be a track car. No bov on a daily would be stupid. Don't believe everything you read on the internet, use some common sense.

i not going by what is on the internet like he is...

i ran my car for couple of months w/o a bov and notice no diff in spool or power. no extra blow by... nothing... and nothing changed when i put a ssqv on it.

but since then i blew that turbo and have sold the ssqv and will prolly run w/ a bov for a while..

[Def]

That compressor surge isn't even real compressor surge: YouTube - True Compressor Surge (http://www.youtube.com/watch?v=nCj6Spwl1CU)


It's all "real" compressor surge. It's just a lot rougher on the bearings of the turbo when you surge at high massflows(on boost) vs. closing/reducing the throttle and getting some light surge.

[!Zar!]

Uhh... Ok. No point making this into a Who does/doesn't run a bov thread.

Even if he DD'd his car across country, the turbo wouldn't blow THAT quick.

[s13dan]

i feel bad for all those poor turbines.....
;)200$-->http://img.photobucket.com/albums/v304/S13Dan/033resize.jpg

[renegade_ewok]

3SGTE motors in japan never ran BOVs from the factory to the best of my knowledge - my friend has one swapped into his celica and he is on stock turbo at >100k miles.

He got the swap in the 70k range I believe. Thats 70k without a BOV. I think that the hundreds of thousands of dollars in research that toyota put into the GT4 outweighs pretty much what garret has to say.

[((sr)) kelly]

bizarre..... deff a oil problem....id take the feed off and start the car to make sure you are even getting oil to the turbo, and how much it really is