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30-08-2012, 05:48 PM
(This post was last modified: 30-08-2012, 05:59 PM by zx_volcane.)
as per title
peaking at 20psi
been on the hunt for boost leaks, can't see any, everything is tight, soapy watered ..etc
Only thing i've done is pull the turbo and remount since the hotside clamp lost a bolt and was starting to make a bid for freedom.
Also fitted egt sender
Turbo looked ok
Didn't replace the manifold gasket (steel), but had only been on the car about 200 miles - although can't see any obvious blowing and everything is nipped up tight.
MBC is wound right in.
Soooooo
I'm sure it was running over 20 before all this.
Turbo knackered / manifold gasket leaking / egt prob somehow causing a restriction
Any ideas, as I'm fed up of going under the bonnet 
*edit
Its probably the gasket isn't it :/
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Itl be a gasket or still a leak some where. Does it hold boost fine? Or does it fluctuate quick thing to do to make sure actuator ain't to blame is to cable tie the wastegate if it boosts over then the actuator is faulty.
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Could be wastegate creep or similar if you have ruled out leaks
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Holds a steady 20 psi
Actuator seems nice and stiff
If I over fuel it I can squeeze one or two extra psi - so don't think its wastegate creep
Will change the gasket next week and see whats up - getting pretty pro at yanking out turbos these days with all this practise
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When this happened to me the ball was pitted in the mbc have you tried without the mbc?
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(06-09-2012, 06:59 AM)con67 Wrote: When this happened to me the ball was pitted in the mbc have you tried without the mbc?
worth a shot isn't it?
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My MBC gave me no end of trouble on my turbo, until I realise that was cause of issue.
Your situation here is very similar to another one I know, and were still baffled by it, replaced turbo/checked all intake pipes/exhaust etc still only boosting just over 20psi. I know this dosent help though lol
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Unplugged the mbc - still no joy
Have amassed 4 different turbos that are lying around now, so will prob just get another one instead and replace the gasket at the same time.
I'm kinda convinced its the gasket now as you can see on the new steel one that they have a raised outline that presumably crushes to fill in any imperfections for a one shot use.
Soon as I get a day off I'll sort it.
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I hope that isnt the case as they cost a 5'er a go!
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I have recently had my turbo off and used the same steel gasket and its fine. Can your turbo suck in enough air to make the boost? What is your intake piping like?
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Right had the turbo off again.
My guess is now at weak actuator.
Can pull it about by hand pretty easy, compared to other actuators I have lying around which are quite stiff.
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I swear some people have fitted the T2 ones on T25's, that may help, if not crack out the welder!
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I'm cracking out a different turbo 
Would have had it on today but having a mare trying to get an oil feed made up with an m10 banjo on the end, been to 3 hydraulic places with no joy :/ ffs it can be done!
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(10-09-2012, 08:26 PM)zx_volcane Wrote: I'm cracking out a different turbo
Would have had it on today but having a mare trying to get an oil feed made up with an m10 banjo on the end, been to 3 hydraulic places with no joy :/ ffs it can be done!
I take it it's not another T25 going on?
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(10-09-2012, 08:28 PM)strictly_derv Wrote: I take it it's not another T25 going on?
It may go back on the silver one, but I've got a new toy for the black one
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 You wont be dissapointed lol
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(12-09-2012, 12:17 PM)CJ_Derv Wrote: You wont be dissapointed lol
its not the td04  - thats for the silver one (this is getting confusing)
Think they tried to deliver the adaptor plates today, but they didn't bother ringing the door bell and I've got a card.
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did you ever get you turbo above 20psi im having the same problem only reaching 22psi
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Lol, I'm several turbos beyond now
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Ahhhh fair one
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