DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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I'd post this in the help zone but its not Corsa related..
Just replaced the turbo on a 3.0d X5, I used genuine garrett refurb, it had no play and was VSR checked so I know the turbo is 'good'..
It was all fine until I took it for an MOT (thankfully it passed) *BUT* on the way there once it got hot it developed a little squeak (sounds like a belt slipping) which occours under-load and only for a second or two, or if you try and hold it under load it pulses slightly. I got someone to rev it up while I had a listen and its 100% coming from the turbo/exhaust area.
My thought is a leak between the manifold and turbo but I havent had a proper chance to take a look but I'm going to have a butchers at it tonight.
Anyone else got any other ideas I could look into if my first idea fails 
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thegsi
Member
Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
User status: Offline
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Have you checked the vacuum on the actuator? Maybe the wastegate is leaking somewhere?
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daymoon
Premium Member
Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
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I'd check for air leaks too.
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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quote:
Originally posted by thegsi
Have you checked the vacuum on the actuator? Maybe the wastegate is leaking somewhere?
Variable vane.. no waste gate 
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Shrek
Member
Registered: 2nd Nov 06
Location: Berkshire
User status: Offline
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Ive had the same problem on Z20LET's before mate, is normally broken stud, blown gasket or cracked manifold. So a leak between manifold and turbo seems a legit reason.
[Edited on 24-01-2012 by Shrek]
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Thats what I'm hoping.. I've not touched the manifold so fingers crossed I've either not done up the bolts tight enough or the gasket is shot
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thegsi
Member
Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
User status: Offline
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You obviously put new gaskets in?
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Original looked perfect, and I couldnt source one either so I reused it
Hindsight is a bitch
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thegsi
Member
Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
User status: Offline
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Yeh not telling you how to do your job, you're obviously competent but I have always replaced any old gaskets regardless of condition or age. Especially those under severe heat and pressure
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Its been a total nightmare.. this is just the tip of the iceburg 
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richc
Member
Registered: 24th Mar 07
Location: Ilkeston
User status: Offline
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quote:
Originally posted by DaveyLC
Its been a total nightmare.. this is just the tip of the iceburg
Out of curiousity, what year is it? And how miles has it coverd?
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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2004.. 90k miles. Blocked PCV filter caused the turbo to blow a seal.
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ShEp
Member
Registered: 9th Aug 05
Location: Dingwall, Highland
User status: Offline
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Sounds like an air leak.
DOne one on an Audi 2.0 tdi and had the same noise, it was a leak from the egr.
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Steve
Premium Member
Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
User status: Offline
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never re-use gaskets thats basic level stuff davey 
[Edited on 24-01-2012 by Steve]
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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I had the turbo powder coated blue though?
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daymoon
Premium Member
Registered: 1st Aug 08
Location: Selby, North Yorkshire
User status: Offline
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quote:
Originally posted by DaveyLC
2004.. 90k miles. Blocked PCV filter caused the turbo to blow a seal.
Is that what is known as Oil separator? Good thing I just replaced mine, looked quite bad 
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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quote:
Originally posted by daymoon
quote:
Originally posted by DaveyLC
2004.. 90k miles. Blocked PCV filter caused the turbo to blow a seal.
Is that what is known as Oil separator? Good thing I just replaced mine, looked quite bad
Yeah looks like an oily old loo roll!
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Daveskater
Premium Member
Registered: 29th Apr 08
Location: Oxford, UK Drives: Jap wagon
User status: Offline
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quote:
Originally posted by DaveyLC
I had the turbo powder coated blue though?
Should be fine then mate, no need for inferior pattern parts 
Numberwang!
Originally posted by AlunJ
I like you Dave, you are a man of men
Originally Whatapp'd by Neo
Dave's maybe capable of a drive-by cuddle
Look at my pictures
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Kerry
Member
Registered: 5th Oct 01
Location: Norwich
User status: Offline
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Sounds like the flux capacitor to me
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adiohead
Member
Registered: 28th Sep 01
User status: Offline
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Nipped up the turbo to manifold bolts and the squeak has gone.. sweet as a nut
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