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Author Topic: Turbo reconditioned and bolted back in  (Read 1706 times)
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Mike8v
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« on: 16 July, 2009, 06:26:33 PM »

It appears that My turbo on my delta is feeling a bit sick and would probably benifit from a rebuild.  The thing is tht Iv spent thousands on it over the past year an I dont want to spend much more.  So the question Im asking is that is it possible to rebuild the turbo myself If I get a rebuild kit and are there any special tools needed to do this

Many thanks
                Mike
« Last Edit: 08 August, 2009, 07:12:33 PM by Mike8v » Logged
chugga boom
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« Reply #1 on: 16 July, 2009, 08:13:23 PM »

friend of mine rebuilt his own turbo, the trick was to mark up the turbines and shaft so that they went back on in exactly the same place so as not to be out of balance when re-assembling, worked ok for a year or so then he sold the car, if the shaft is knackered then you may run into trouble with balacing the unit, the bearing is a floating unit where the turbine relies on oil pressure and balance to run true and so that the turbines dont hit their casings when moving, i've never been brave enough to rebuild my own always gone down the recon or s/h unit approach, good luck and let us know how you get on  Smiley
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Neil Lewis
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« Reply #2 on: 20 July, 2009, 11:16:39 PM »

Each time my turbo has needed to be rebuilt, it's needed a new casing too because of circumferential cracks.  I don't know if that's unique to the 8-valve integrale but it's worth consideration.

I sent the first one to Turbo Technics and the second and third to Owen Developments near Oxford (note that's on two seperate cars).  Turbo Techics were overpriced at 600 and the rebuilt turbo shed a turbine blade just after the one year guarantee ran out; coincidence maybe?  Owen Developments charged about 400 each time but I had no trouble afterwards and they're not condescending when you talk to them!

If the casing was OK I would probably have tried rebuilding them myself.

Neil
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Mike8v
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« Reply #3 on: 31 July, 2009, 04:31:20 PM »

Well After contacting a cr turbos and getting no reply I then sent an email off to midland turbo with a nice quick response.  They picked up the turbo on tuesday and payed for it yesterday so now just waiting for it to be sent back, Id imagine itll be next week cant see it arriving tomorrow.  But its had the seals, bearing and shaft replaced and I was thinking of getting the bearing uprated to a 360 and that would of been 70 ontop of the rebuild but lucky gor me it already had one so didnt have to pay any extra. 
If all goes well then I would recommend Midland turbo to anyone, free collection and delivery and quick collection aswell, phoned up moday about 5 ish and picked up tuesday bout 2.30

Will let you know when its back on an how its running.

Just one question, I dont have an electronic boost control but instead what i have is a three way bleed valve between the actuator and the manifold.  I just need to know how the thing works and where the 3rd line goes.
Before the rebuild of the engine it was not connected to anything so just sucking air, so if any of you have this then i would appreciate knowing how yours is set up

Thanks
Mike
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Neil Lewis
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« Reply #4 on: 02 August, 2009, 09:53:01 PM »

The bleed valve has three ports.  The two either side go in the pipe to the wastegate and the third port (at the bottom) goes to atmosphere.  A knob on the oppiste side controls a needle vale which allows some of the boost pressure to be bled away (that's why it's a bleed valve) making the wastgate think there's less pressure actuating it.  Be very careful and start off with the valve closed, ie, it has no effect.  Then slowly day-by-day, open the valve 1/4 turn at a time and listen very carefully to the engine; it'll make funny noises if you go too far.  It's very easy to open the valve too far and blow up your engine: I know cos I blew a head gasket!!!

All HF's (turbos and integrales) have a boost gauge so I suggest you keep a close eye on that and don't go beyond the 1 bar mark.  You need to be aware that the boost will instantaneulsy go much higher when you whack the throtlle open and medium revs and then die away.  It's constanmtly using that initial burst which catches people out.

By the way it's just as easy to blow up the engine with the electronic ones too!

Neil
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Mike8v
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« Reply #5 on: 08 August, 2009, 07:11:54 PM »

Got the turbo back on tuesday so in all from them picking it up to dropping it back off took 7 days so not too bad on that part.  I started wed afternoon and then finished on the thursday afternoon.  So far so good no smoke out of the exhaust boost's nicely I just need to tune in the bleed valve now (many thanks Neil for explaining it to me). 

If any ones interested in looking at some pics of the car then go onto retro rides forum and its posted in the readers rides section   1991 Lancia delta integrale

As siad before I would reccomend Midland Turbo to anyone as it was resonably priced at 375 for the rebuild.

Mike
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