joppe

So i bough uset holset hy35 from ebay and seller told me that it was rebuild by holset. It didint have any shaft play but compressor blade had minor touch with housing before rebuild. So i put turbo in my ef civic with dohc zc and custom manifold etc. First run i noticed strange sound and no boosti, only something like 3psi. I think something happened because compressor housing touches radiator and when motor moves, it pushes turbo, so i think wheel hit housing or something?

I have -3an oil feed and good return. i Checked before starting that turbo gets oil. I noticed that turbine housing vband was moving and it wasnt tight, so maybe it "bent" turbo somehow and trashed it? Turbo is blowing air good and wheel keeps spinning like 10 sec after turn off the car... It still doesnt make any boost and sounds strange and i noticed i have shaft play now... I tested car with different angle radiator so it doesnt touch and still have no boost..

First vid, making that sound with bre launch control..

http://www.youtube.com/watch?v=Yc9jjM-qGtY

Second trying to boost it on run, first 5th gear then 4 then 3...

http://www.youtube.com/watch?v=RnlTKDoQfgE

Now what? Turbo rebuild? What if turbine wheel is trashed, its so expencive that maybe get another turbo ? and WTF happened?? Is -3an good oil feed to holset?

jdm inc

iTrader: (11)

have you check for boost leak anywhere? How are you couplers are they all nice and tight?

joppe

Yes all checked, and i blow air with compressor throught intercooler and piping so there no stuff blocking boost...

HiProfile

If a turbo was flexable enough for a radiator to bend the chra or housing, do you think it could handle >100,000 rpm's?

My guess is you have a very bad leak somewhere. Research how to pressure check your pipes and BOV, and also check your exhaust. Sometimes people forget to put their wastegate's fire ring between the WG and flange, and get a massive leak. Any minor leak in the exhaust before the turbo will be a major problem when it comes to spool-up.

Otherwise if the turbo was junk, the person you bought it from was lying. Usually a turbo that's hitting the housing will have already ruined every seal inside, and will smoke badly. If it's not smoking, it's a leak as mentioned above.


I do have one question - what RPM was your motor in that 3rd gear pull? The hy35 is big enough to not produce any boost on your motor until 5-6000 rpm.

joppe

Oh and exhaust manifold (backpressure) is 10psi 4000-5000rpm. Maybe i blow turbinewheel? i have had turbo with shaftplay and it still makes boost but not with this one.... ? ?

joppe

Over 5000rpm... with 3rd gear. No boost at all..

joppe

This wastegate doesnt have firering, vband will shut it. And wastegate is not opening yet...

joppe

And i didnt mean that turbo actually bent, i mean it little pushed chra and turbine house out of together because its with pretty little vband.

Flashmn

So does your wastegate need a fire ring or is it built into the wastegate with the Vband? What wastegate is it? Cheaper wastegates have had issues with the valve getting stuck, thus letting the exhaust circumvent the turbine and thus no boost.

joppe

I think i should heard if its open.. Its 60mm xs power... Its not opened ever by boost in car, just tested it with compressor and it worked good...

Kr4nG

iTrader: (1)

U need to take the turbo off and inspect it. If something is making a strange noise something is broken.

joppe

I take the turbo out and find out that compressor housing o ring was missing!!!

http://www.aijaa.com/v.php?i=4792412.jpg

compressor wheel was hitting the housing and bearings are gone too.

wheel:
http://www.aijaa.com/v.php?i=4792476.jpg

housing:
http://www.aijaa.com/v.php?i=4792491.jpg

I emailed seller and waiting for his response. He told that turbo was repaired by holset, here is straight copy from email:

"yes it was rebuilt by holset they balanced it then"

What now?

TheShodan

iTrader: (14)

that rubber o-ring is optional unless it was pinched against the housing to cause the compressor cover to not seat evenly onto the backplate. But not having that piece of rubber is not what caused your issue. this turbo sounds like it simply wasn't rebuilt as stated by the seller. Caveat Emptor on E-bay.

joppe

It had no shaftplay at all before first run... I found new bearings and wheel so if i take it to balancing shop and rebuilt it and get o ring, i cant go wrong?

joppe

Hmm.. I measured my oil flow with -3an feed line, and it was 0.5litres in minute. Holset manual says that it need 2 litre on idle and 3 litres in max torque. Oil pressure was 5bar because engine was cold. I measured it again and it was pretty same when pressure was 3bar. That -3an came with revhard turbokit and it did good with precision(garrett) turbo.

So i take my old oil feed which was -4an i think, little bigger than revhard line, and measured it, and it flows 2litres in minute at idling.

http://i30.photobucket.com/albums/c3...olsetSpecs.jpg

Kr4nG

iTrader: (1)

so you think the oil line was to small for that turbo?

Spaceballsthelunchbox

I think the damage is done. If the exhaust housing was loose and it scraped the turbine wheel it definitely damaged it. The turbo must be perfectly balanced to spin high enough to produce boost. If the moving assembly is out of balance, vibrations in the shaft will not let it get to operating speed.

Have the turbo checked by a pro.

fernancivic

say no to used turbos ..lol

joppe

I was wrong about turbine wheel touching turbine housing. There was no marks In turbine housing... Im not sure if im gonna rebuilt that turbo, holset have good instructions available but im not sure to get another one or rebuild... Ebay seller doesnt answer email.

oodie

Same here. I would file a paypal claim if you used them.

joppe

Hard to prove anything? And shipings costs 100$ because i live in europe..

Kr4nG

iTrader: (1)

now this scares me because im a week away from mounting everything up for my turbo. i bought a turbonetics is has been rebuilt and never installed. i havnt taken it apart because im assuming it is in great working order. what do you guys think take it apart and inspect it? there is no side to side movement but i have up and down. hope everything works out for you.

joppe

Turbo is pretty easy to tear apart and reassembly. Just mark your compressor wheel location good and u can do it. I would do it now since this happened, and when its apart, check the bearings are really good and turbine shaft and wheels are in specs (straight etc)