RSBryden

Celica gt4 again!!!

Sorted engine management light n the car is saying no faults!
Checked the turbo and there is no play what so ever!
Actuater. Seems fine,
The boost gauge isn't building up past neutral....

Any ideas?

Mk4 Rick

Vac leaks,boost soloneid,boost hoses,actuator,massive crack in the exhaust housing.Pipes fell off.

RSBryden

Gona remove the whole turbo unit off in the morning, what housing isn't cracked, vac pipes seem ok , no hoses have fell off, dunno about boost solenoid,

The car is smoking alot white/blue exhaust smoke lots of it when u rev her

stevieturbo

Is it an ST205 or the earlier ST185 ?

The 185's eat head gaskets worse than the worst K series.

205's generally much better though. But unless it was really buggered, you'd expect to see some boost.

As for removing turbo in the morning....leave a full day for it ! lol

What do the spark plugs look like ?

scoooby slayer

iTrader: (4)

does the turbo shaft spin freely ?
it may not feel like any play but if its jammed it will feel tight and wont turn.

white/blue smoke is likely from the turbo getting in the exhaust system, if ur plugs are clean and not fouled it will be another indicator its the turbo as its not even in the combustion chamber

does seem odd though all this after the timing belt issue you posted about....

can you get your hand in there to the inlet of the turbo easy enough or are they a twat ?

RSBryden

Steve it's a 205 buddy, I spent 3 hours removing the heat shield covers today aswell as all the elbow bolts and mani bolts, got to remove the down pipe mounts in the morning that should make the turbo unit lift straight out with the mani.

Scooby slayer,
I have replaced all plugs costing 80Ł for 4 and all leads, full service an cam belt and alt belt , replaced the Copland level sensor as he car was running with engine light on, sorted that now,

He turbo does spin freely and feels solid I spin her and remove my had n she still spinning ,

scoooby slayer

iTrader: (4)

strange one then mate ? get that blower out in the morn and see how she looks, you will know straight away as there will be oil/water ingress in the back of the turbo.

RSBryden

I appreciate your help an knowledge budy, really pain in the arse, gotta remove the alt to remove the unit too,

Ill keep you updated scooby slayer an Steve,

Ps I hope that weapon of urs scooby is sorted now as I have been following ur post about the skyline n the messin about waiting for parts

stevieturbo

Wait til you try and get the bracket that's impossible to see under the turbo unbolted !!

Think it's from the cat housing to the engine block.

Oil feed/drain isnt exactly easy either.

As said before, whoever designed those cars was a cunt !!!

From the description of smoke and no boost at all....I'd still be struggling to believe the turbo is at fault. Plus you say there is oil in the inlet of the turbo...ie from the breather system ?

Check plugs, do a compression test.

stevieturbo

Dont think you do need to remove alternator. But do remove radiator etc....it helps massively.
Although it's been some 16 years or so since I worked at one.....16 years of bliss !!! lol

RSBryden

Yeh the bracket ur on about is what I've got to remove tomorrow lol

I put some rust breaker on it over night to free it up,

There is 1 bolt behind the alt for the mani which I gotta get off,
The japs must have small hands as everything is built on each other, not like a rs everything is straight forward,

Ill check plugs also pal,

RSBryden

Oil is in pipes from turbo to filter and from change cooler to turbo , but all the breather pipes hook onto air filter elbow

scoooby slayer

iTrader: (4)

yeah all sorted thanks mate pas pulley is wrong on the damper but I think its sorted it hasn't chucked or spun the belt yet and its seen over 8k rpm a few runs and 140 plus no issues

RSBryden

Very nice mate,
Are those 140+ on ur drive way

Glad it's looking good now pal

gingerturbo

iTrader: (2)

You will need to access both side of the turbo as the compressor side may be fine and spinning freely but it may have a seized exhaust side and a snapped shaft

Also make sure you've checked the vacuum side of it properly as the pipes may seem fine but Italy not actually producing a vac

Also try and disconnect you cat/lambda and drive it like that as the cat may be bloked

RSBryden

Ill get the lot off tomorow buddy an have a feel about an c what looks ok n what ain't.

I was doing 125mph in 4th gear when the power went!
Did make a little noise ..... Bit drunk now

jamie's

125mph in 4th? i always thought they were quite short geared
what kinda rpm was it pullin for that?

RSBryden

To be honest buddy I think they rev for ever, I was about 6500k rpm just short of redline, it seems like they pull for ever

Mk4 Rick

Pipes can collapse inside as well.Do your boost pipes feel soft.When your trying to boost the pipes might be getting squashed flat assuming you haven't got hard pipes.This happened to me on my old Volvo T5.Also what about a cracked intercooler?

Mk4 Rick

A tiny bit of oil on the compressor side is ok as well.

RSBryden

The pipes are softish buddy but not enough to collapse to the point of no flow!
Intercooler/chargecooler is mint buddy no dent or damage and is good for 450-500bhp as I been told n the car has only done 51k from new

Mk4 Rick

Does the turbine shaft spin freely

Mk4 Rick

Some actuators maybe all of them have seals in side them and they also where away as well.Causing loss of boost some actuators are a seal unit unit and some you can strip down.Im sure you could test them with a bike pump or some thing

RSBryden

Yea bud I spin it with fingers n it still spins wen in watching it, it feels tight n new not worn baggy, no play

RSBryden

I hand no boost no spool no woosh n the gauge barley makes neutral boost buddy :s

Mk4 Rick

Im not turbo god or anything but try the actuator first.Does it feel taught or slack?Is the waste gate stuck open or broken.Ive just read that the Gt4 has a boost control soloneid called a VSV.They are normaly 3 port or some times 2 port jobs black plastic may be metal if its after market.If you can find it try by passing it but don't rag the fuck out of it or it will over boost.Just see if it rises at all.

RSBryden

Cheers bud ill lok for it in mornjng. Feeling sorry got myself buying it ...

Mk4 Rick

No problem.Dont give up on it it will be some thing or nothing

RSBryden

Just fired the engine up and when on idle the blades in the turbo barly are moving, I can stop them buy touching the bolt in the centre and when I stop the blades they don't spin back around' but I can spin them easy with my fingers,

Can't get the turbo mani off unless I remove the whole front end off, rad, oil cooler, alt and lots of othe jap crap

Fast Guy

If you can get to it, check the wastegate actuator rod hasn't fallen off. It does happen from time to time. Failing that could be a split diaphragm inside the actuator or the turbo shaft has sheared.

RSBryden

The rod is still on, n actuater is working , car is smoking my whole street out with thick white smoke wih bit of blue in it

Fast Guy

Turbo's gone by the sound of it, but mine have always still made boost even when smoking that bad.

RSBryden

It doesn't even get to neutral on the gauge, no play either, slight left n right if I'm honest, pain to get the turbo off bud!, how much would u expect to for a garage to replace turbo if I supply it,

Would it be worth geting it diagnosed on a rolling road 1st or def just replace turbo

Mk4 Rick

Turbine shaft could be snapped in the middle

Mk4 Rick

Id take the turbo off and inspect it first

stevieturbo

Easier said than done. HORRIBLE cars.


But, what is slightly easier, and can be done as the turbo has been deemed scrap.

You could with some difficulty remove the turbocharger from the turbine housing in situ. There is a risk of damaging the turbine wheel blades, but as that part is screwed anyway, no big deal.

But due to the horrible design of the oil feed/return and waterways to the turbo, even this is not an easy task. But it may be easier than removing the entire turbo/manifold/cat as one. And it may then give you better access to remove the rest of the manifold etc afterwards.

As for stripping the front end. You can remove the turbo without taking off any of the parts you mentioned. But you'd be mad to try and do it without at least removing the radiator, although it is possible.
But Im 99.9% sure the alternator or any other bits do not need removal.

And this task is bad in a GT4....it's even worse in an MR2 !!!

RSBryden

There is 2 bolts tucked behind the alt for the mani dude ! My mechanic is comig to pic her up n drop turbo out tomorow, fucking stupid car wish I never bought it.
There a right pain in the ass, my hands are cut to prices n my back is sore leaning over it!

Thinking to get he turbo rebuilt! Upgraded also!

Is there anyone I can recommend to rebuild turbo

Mk4 Rick

Do these use a T28 turbo?

stevieturbo

Told ya whoever designed them needs sliced into a million pieces lol and you thought that was harsh !!


Nope, it's a Toyota turbocharger

scoooby slayer

iTrader: (4)

the jap stuff is more reliable than fords but there a lot more of a twat to work on

for simplicity and ease of working on the old cossies were one of my favourite modded cars