screeching loud turbo

[Team_Undisputed]

so my dad did an oil change last night while i was sleeping and i saw on the dip stick that it was past the HIGH point on it and now my turbo is making a really loud screeching noise when i drive it in the high rpm range can this be caused by to much oil in the motor? every time it spools up the noise gets loud i can here it over my exhaust i know its not cause the spooling because i hear the regular spooling before the loud screeching does anyone know whats wrong? oh and he used Royal Purple oil 10W-30

oh and my car also bogs from time to time but we took it to our mechanic today and he said the timing was on par and the idle is right but he took off the boost solenoid can this be the cause also?
Modified by Team_Undisputed at 4:39 PM 9/24/2008

[supreamS14]

he used Royal Purple oil 10W-30

WOW!!! What a great dad ! RP is the best ! I would drain little by little untill it is at level. Then check to make sure your not over boosting. Taking off the boost control solenoid wont hurt. It might even get you 10psi. A boost gauge is very helpfull and will tell you how much boost/ vac you have. Report back after completing.

[Rosco]

I bet it's an exhaust leak where the manifold meets the turbo....

[IanS]

I bet it's an exhaust leak where the manifold meets the turbo....

That is exactly what it sounds like to me also.

[Team_Undisputed]

WOW!!! What a great dad ! RP is the best ! I would drain little by little untill it is at level. Then check to make sure your not over boosting. Taking off the boost control solenoid wont hurt. It might even get you 10psi. A boost gauge is very helpfull and will tell you how much boost/ vac you have. Report back after completing.

alright man thanks for the help ill do it tomarrow its pretty late to do it over here so ill just do it tomarrow after schoolheres a pic of the dip stick when i took it out today:(the red H is where the dipstick has the "H" engraved on it and the green line is where my oil level is at )

I bet it's an exhaust leak where the manifold meets the turbo....

alright ill look into that too but the manifold seems to still be in tact with all the bolts no gaps except for this one in the pic ( the red circle is where the bolt seems to be missing?? and the red lines is where there is a tiny gap but im not sure that there is supposed to be a stud there)



i was also wondering if i should plug up these lines since i took off my charcoal canister

[IanS]

That looks like you are about half a quart over filled, it shouldnt be a big deal, just drain it out.

There should not be a bolt there, that is the back of the stud, there is a nut on the other side of the turbo's flange.

The gap you are seeing is where the gasket is. It only takes a tiny leak to create a hell of a squeal under boost.

[Team_Undisputed]

There should not be a bolt there, that is the back of the stud, there is a nut on the other side of the turbo's flange.

The gap you are seeing is where the gasket is. It only takes a tiny leak to create a hell of a squeal under boost.

alright thanks for the help man so how should i try to close up the leak check for the rest of the studs??

[IanS]

alright thanks for the help man so how should i try to close up the leak check for the rest of the studs??

Check the tightness of all the nuts, they tend to come loose, its a common problem.

If you cant get rid of the noise by tightening them, you will need to replace the gasket.

[Team_Undisputed]

Check the tightness of all the nuts, they tend to come loose, its a common problem.

If you cant get rid of the noise by tightening them, you will need to replace the gasket.

alright thanks man so i was driving my car today now that the oil was lowered and no it seems to bog a little bit more when i push it in first the car struggles and i hear some sort of a backfire coming from the exhaust and then it just pulls probley spark plugs??(they were changed the night before same time as the oil) so im like what the heck is going on now lol and the turbo is still screeching oh and when i got out and popped the hood the turbo and manifold were bright red....cause of the heat??? or something else?

all this 4 days before my drift event

[supreamS14]

My exhaust mani and turbine glow bright red only after drifting and boosting for a few minutes. Did you gap the plugs correctly? my car would bog when my maf was dirty. I used some crc maf cleaner and it pepped back up. when the motor is cool you could put some soapy watter by the turbo gasket and rev it to see if there is bubbles indicating a leak. This might not work considering things expand as they heat up.

I don't want to say it but worse case mabby the turbo wheels might be contacting the housings.

[IanS]

If you have glowing red exhaust parts, it is likely you are running lean. The only time you should see that sort of heat, is after extended bouts of boost.

The backfiring lends credit to that as well. I would check for leaks after your MAFS, before your turbo. Also check for ECU codes.

[tercel drifter]

as said before check the tightness or ur turbo to mani. when ur engine is cold grab ur turbo and see if it moves a little if it does take the mani. and turbo off and tighten it. if its not that check if ur dad also replaced teh turbo with a supercharger

[Team_Undisputed]

My exhaust mani and turbine glow bright red only after drifting and boosting for a few minutes. Did you gap the plugs correctly? my car would bog when my maf was dirty. I used some crc maf cleaner and it pepped back up. when the motor is cool you could put some soapy watter by the turbo gasket and rev it to see if there is bubbles indicating a leak. This might not work considering things expand as they heat up.

I don't want to say it but worse case mabby the turbo wheels might be contacting the housings.

alright sounds good i was about to clean my MAF anyways so i might as well lol oh man i really hope its not the wheels hitting the housings

If you have glowing red exhaust parts, it is likely you are running lean. The only time you should see that sort of heat, is after extended bouts of boost.

The backfiring lends credit to that as well. I would check for leaks after your MAFS, before your turbo. Also check for ECU codes.

thatnks man your a life saver!!!

so i was under the car today and i happened to see that the mani to turbo was missing 2 nuts and then i saw that the manifold had a whole bolt missing but i kept looking at it and i saw that the bolt broke into 2 pieces so there is now half of a bolt in my engine heres some pics:

the 2 bolts that were missing were here (top view)

and now the bottom view the far bolt (right one in the pic) was a pita to put on

and now for the broken one yayyy....not...

another view

[IanS]

Make sure to re torque those bolts a few times, or they will fall out again.

[supreamS14]

No lock tabs? I use new lock tabs and put another nut over the first nut to act like a jamb nut.Looks like you found your problem. Your turbo should be fine after you fix it. I seen some stage 8 locking nuts and bolts on tv the other day. They look like they would work good.

[Team_Undisputed]

ok so i tighten all the bolts but the only bolt i cant get to is the manifold bolt cause the hole had half of it still in there and today i took it for a drive to see if it would do the noise still and the noise calmed down alot but i can still hear something (sounds like the turbo spooling but it still sounds like a screech) when the turbo is spooling up i think its a bad gasket or is it cause the manifold is missing a bolt??? heres a video of the sound:http://www.youtube.com/watch?v=gQ93oIwsgeg

[Team_Undisputed]

video of the noise is up

[IanS]

video of the noise is up

Id put money on the gasket being toast, Ive heard that noise before. It looks like you will be pulling the manifold and or turbo to replace it.

[Team_Undisputed]

Id put money on the gasket being toast, Ive heard that noise before. It looks like you will be pulling the manifold and or turbo to replace it.

alright thought so thanks for the help man do you think i could go a drift event like this and then change it afterwards or will it just make it worse?? and can this be causing my turbo to be laggy??

[IanS]

alright thought so thanks for the help man do you think i could go a drift event like this and then change it afterwards or will it just make it worse?? and can this be causing my turbo to be laggy??

It will make the car a little laggy, but I dont see it causing any serious problems. I would be careful just in case, keep an eye on your gauges. If you see the manifold glowing again, I would be careful, you may have other issues.

[ryanmasters240]

start draing oil little by little until it stops this happened to my buddys ae86 and it killed his oil pump

[IanS]

this happened to my buddys ae86 and it killed his oil pump

Apparently your ability to read died along with it.

[Team_Undisputed]

It will make the car a little laggy, but I dont see it causing any serious problems. I would be careful just in case, keep an eye on your gauges. If you see the manifold glowing again, I would be careful, you may have other issues.

FlatBlackIan your a life saver man thanks so much for all your help man!! i just added some silicone high temp gasket maker to it just for the mean time to see what happens and then change it out later hope it doesnt make more problems....

[Team_Undisputed]

wow so i drive my car today (the day before the event) and the turbo does not kick in and when it goes into the RPM range where it does kick in it just bogs and doesnt go anywhere and it sounds like it back fires too im soo down right now right before my first event too.... can anyone help out??

[IanS]

Any ECU codes?

[Team_Undisputed]

Any ECU codes?

i dont have anything that can check for codes all it does is it sputters and adds no boost and all these popping noises come from the exhaust like its backfiring but not as loud

[IanS]

i dont have anything that can check for codes all it does is it sputters and adds no boost and all these popping noises come from the exhaust like its backfiring but not as loud

What gen SR?

You should be able to pull codes directly from the computer, using the OBD system.

[Neil]

sounds like classic boost leak to me... go over all of your couplers and make sure any of your hoses aren't trying to pop out and that the clamps are all tight.

A loose coupler can be pretty transparent while cruising in vacuum but won't hesitate to vent any boost. If you have a boost gauge I'm assuming you feel the car stumble at just above 0psi? If it is a boost leak then the stumbling is just a momentary rich condition, since the maf is metering for the air that the turbo is pulling, but it's being vented instead of getting to the combustion chamber.

If it IS an exhaust leak at the T2 flange, I'd pull the car off the road and fix it asap. Otherwise you really don't know where the 1000° blue flames are pointing and your car could burn to the pavement, which is precisely what happened to my friend's bluebird swapped G20.

[Team_Undisputed]

What gen SR?

You should be able to pull codes directly from the computer, using the OBD system.

its a S13 redtop 1st gen?? i added silicone around my manifold and where the turbo go so it could seal it up a little bit and now it wont even boost.. man im really bummed right now i mean really bummed....

[IanS]

its a S13 redtop 1st gen?? i added silicone around my manifold and where the turbo go so it could seal it up a little bit and now it wont even boost.. man im really bummed right now i mean really bummed....

Neil is correct, It sounds like a boost leak, go over all of your charge pipes.

As for the ECU codes, you can put the ECU into diagnostic mode using a small screwdriver. Im too tired to type out the whole procedure. Search for it, the info is out there.