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Discussion Starter #1
Hi To All

I am 95% certain that I am going to change the turbo charger on my 159 1.9 Jtdm SW and wondered if anyone knows of the inlet manifold has to come off to do this?
If so and with 97k on the clock and having had sticking swirl flaps in the past(although all seems ok at the moment), is there a case for replacing the manifold at the same time ?

The turbo is going to be quite expensive and I don't want to just waste money but as I have no intention of changing the car for at least another 30-40 K then it might be worth it?

My cars had the DPF removed and a slight remap by Adie at 90K but when I blanked off the EGR a year or so ago it was very gummed up and sooty so guess the manifold is too and all the damage sootwise was done by the previous owner.

All your thoughts would be appreciated

Have a Happy Alfa Summer
 

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No the inlet manifold is on the other side of the engine to the exhaust side so doesnt need to be touched.

The turbo and exhaust manifold are one unit and pretty easy to change.
 

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Discussion Starter #4
Hi
Thanks for your replies.

Adam what was your turbo doing prior to its demise or did it just blow up out of the blue?
Mine is making an increasing whining noise that's steadily getting worse.
Cheers
 

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Hi
Thanks for your replies.

Adam what was your turbo doing prior to its demise or did it just blow up out of the blue?
Mine is making an increasing whining noise that's steadily getting worse.
Cheers
I was getting a mettalic scraping noise (worse when cold) getting worse over a period of 6 weeks, the VNT vanes were making contact with the housing, I had no whine or smoke .. Or even decreased performance. 98k is good garrett and hks say 75k -80k is around average variable geometry turbo mileage ... Luckily mine was under warranty !

Whine is normally either bearing noise, or a whine like air is escaping so firstly use the squirt bottle and washing liquid trick and spray all the hoses and connections, look for bubbles failing that. Pull the air duct off the front of the turbo (undoing the clip obviously) and check for excessive play in the shaft. Up down left right and spin it if you can and listen for anything untoward any movement will tell you if the bearing is worn and it's a journal type bearing not a ball bearing turbo so it shouldnt move at all and if any not much !

You can only inspect the rest like vanes, shaft ect by stripping it out.

There's a GT15 GT17 GT25 minor rebuild kit available anywhere from about £40, which basically is new bolts, seals, and journal bearing.

A new shaft and turbine is around £80 .... House a compressor it's time for a new turbo and not worth fixing ... Hope this helps !!! :)
 

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Discussion Starter #9
Please correct me if I am wrong but I would not advise trying a rebuild of a turbo charger at home as this is a highly specialist task. Also the turbo needs to be recalibrated and balanced afterwards and this is something that
requires the correct equipment.
Also a GT17 Garratt is definitely a variable vane turbo charger and I think they are even more difficult or impossible to refurbish.
Try C R Turbo Engineering, spoke to a really helpful guy there about this but decided in the end to buy a brand new turbo. I think they are based in Hampshire near Southampton.
 
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