How do i clock my turbo??

[AN89HATCH]

I have a t3 t4, and i tryed to top mount it, but that was not going to happen lol, it seems to be alitle to big, or my manifold is alittle to close to the motor anyway, I am side mounting it agin. I clowed the exhaust housing, so not the turbo is able to be bolted to the manifold, with the oil inlet, and oulets sitting straight, but now i need to know how to clock the compresor of my tubo with out messing it up?? The turbo is now sitting, so the compresor housing outlet is facing tourds the fender well, and i need it to eather aim up or down. How do i do this with out messing up my turbo? Do i just unbolt the bolts in the front and turn the compresor housing? I tried experimenting with my sabb turbo, and when i unbloted the compresor bolts, and twisted the compresor housing, then i heard a little sound, and notice there was a gasket that snaped in half, and then the turbo had some shaft play. So what is the properway to clock the compresor ?? I searched could not find anything thanks

[DammitBobby]

Yep just loosen the bolts and spin it around.

[S14tat]

also make sure the bolts are torqued down diagonally, each side little by little. if you tighten it too much on one side, the compressor housing could get pressed up against the compressor wheel and the wheel won't spin freely. ( not sure if this happens on all turbos, but it happend with my rebuilt one )

[wild_maxx]

i need to know this also. the bolts you speak of loosening are the ones circled on the compressor and exhaust side? then just rotate them until the point the way i need. i changed from a SMIC to a FMIC the prevous owner use a SMIC so its pointed the wrong way.

[virus77]

nope, for the compressor side it is the ones that are on the center section of the turbo, opposite of the turbine ones you circled in the 2nd pic.

[wild_maxx]

so you mean the blue circles ones for the compressor and i have the right ones for the exhaust side to clock the turbo. and do i have to clock both sides?

[virus77]

there you go. well your gonna mount your turbine to your manifold which might put your oil feed and drain facing at odd angles when it should be nearly verticle so you are probably going to have to rotate the center section in respect to the turbine so the gravity drain on the oil return doesnt clog up. after that you will need to rotate your compressor in respect to the center section so the outlet of the turbo going to your hotpipe is facing the right way (usually down or towards the driver side fender). So in short, yes you do have to rotate both most of the time.

[AN89HATCH]

so since i need to rotate my compresor, so it does not face tourds the wheel well, will I also need to remove the smaller blue circled bolts? last time i removed the red bolts, and maby thats what messed up my turbo.

[S14tat]

you can pull the whole housing off by just loosening all the bolts in the red circle. to rotate the center bearing housing you need to loosen the bolts on the turbine housing.

i try to clock the center bearing housing first so that the oil return will be as vertical as possible. then tighten the bolts, then i would reclock the compressor housing. but remember again, try to torque them in little by little in a diagonal pattern because housing might hit the blades if its torqued too tight on one end.

[AN89HATCH]

you can pull the whole housing off by just loosening all the bolts in the red circle. to rotate the center bearing housing you need to loosen the bolts on the turbine housing.

i try to clock the center bearing housing first so that the oil return will be as vertical as possible. then tighten the bolts, then i would reclock the compressor housing. but remember again, try to torque them in little by little in a diagonal pattern because housing might hit the blades if its torqued too tight on one end.

hmm im alittle confused, so to rotate my compresor housing, I do not want to pull the whole housing off rite?? i just want to turn the compresor. I already clocked the oil feed and drain etc, but nor my compresor is at a weird angle. so do i loosen the red circled bolts, or the blue circled bols to clock the compresor?

[crzycav86]

Just the red ones.

[AN89HATCH]

hmm then why did the guy on the top post say to unbolt the blue ones to rotate the compresor??

[virus77]

Hmm, I used the blue ones but from further examination of the pic I guess it would rotate from those just fine. My turbo was apart when i put it back together so i didnt notice you could do that.

[wild_maxx]

ok lets set this straight for anyone in the future that may actually seach for this topic and learn something from it. to clock the turbo u say to loosen the red circles bolts on the compressor then you will be able to rotate it to the point that you need? do you completely take out the bolts or just loosen them? and do you hvae to clock the uxhaust side? if someone can answer all of these clearly that would make clocking a turbo much more simple. thanx.

[wild_maxx]

i took off the red circled bolts and the compressonn housing came off completely exposing the turbine blades. can i just rotate the turbine housing to where i need it or do i have to clock the entire assembly?

[crzycav86]

You can do whatever you want as long as the oil drain line goes straight down.

If you want to clock the turbine too, you'll probably have to loosen some bolts on the turbine side too. I never had to do the turbine, so I don't know exactly which bolts to loosen on your turbo... but someone else will be able to help you.

[AN89HATCH]

when the whole thing came of, did you break like a little rubber seal?? did it give the turbo shaft play? when i did thatr to my sabb turbo, ther was a rubber seal that broke, and my turbo got shaft play. maby it was just an old turbo

[wild_maxx]

no my turbo did not have a rubber seal. i just took off the turbine cover not the entire part. i dont have any shaft play so no i dont have the same prob as you. you should post some pics of your turbo and ask what needs to be done.

[wild_maxx]

well i just clocked the compressor housing so it would point directly down making it easier to route the hot pipe i did not have to clock the center housing and the oil feed and exit are still lined up perfect. did i clock it right?before:

AFTER:you can see that the oil feed and exit are verticle so it should not restrict any flow.

[wild_maxx]

COME ON NOW is this correct? and when using a MBC do u just splice it between the wastegate and the inlet?

[S14tat]

yes the turbo is clocked perfectly. and for further questions. if you needed to clock the center section, you have to losen like 6 bolts on the turbine side. its the same thing as rotating the compressor.

also since you have a internal wastegate, you need a MBC with only one port. a MBC with dual ports like the turbonetics ones are designed for an external wg.

basically with the single port MBC you just need to intercept the boost signal goin to the wastegate. so you should be fine teeing off the compressor housing to the wg.

[wild_maxx]

awsome d00d. thanx alot. i have been waiting for someone to reply. thanx again. very useful informaiton.

[Silvia_Drift]

Hey guys, I have the same problem but completely missed which bolts I have to loosen lol. So do I loosen the red or blue bolts?

[veilside180sx]

red, just loosen them enough to be able to rotate the assembly