So as you know im in the UK and not many PSD over here blah blah.Had my truck 3 years not many problems at all but this last year ive noticed either low boost or over boost the odd time. Normally sorts itself out and hasnt really bothered me.It hasnt been getting worse but this last week it was over boosting for two days and didnt sort itself.Now when it over boosts I have to baby it.what happens is it takes off smartish then hits a brick wall with no power or revs and loads of turbo fart. we call it blow off but now I like turbo fart. I recently found this site did some home work and decided my VGT turbo was stuck with vanes closed.So this morning I wipped my turbo off for a look. read this site first and it was loads of help.My truck has done 76000 miles and turbo hasnt been off before.Well done those that claim theyre off in 15 or 20 mins I was in total about 1 hour and half but over two days and heres why.I started with the inlet side pipes off then started on the three bolts. Front left bolt was missing so I thought bonus.Front right was really really tight so i decided to use some penetrating oil and leave over night.



Im a fairly big guy but still had to get in the engine bay so I used plenty of bubble wrap to make it comfy.

Came back to it this morning and like some one else on this site found it practically jumped off with only a quarter of the effort.It was crack tight but once slacked off it could be backed out with my fingers.I would recomend this to anyone doing this job as you dont want to round off these heads.Its not that the bolt threads are tight its because theres some kind of heat or rust action between the large flanged special bolt head and the casting.The rear bolt was easy reaching over the top with a 3/8 drive and extension straight down on to it.I couldnt touch the bolt with my fingers so retrieved it with a flexible claw tool.Both exhaust clamps I used a flexy head ratchet spanner and a hammer to tap them loose.Heres what I used.



I used the 1/2 drive and all the extensions and a flexy to take out the front right bolt.Disconnected oil pipe and lifted out the turbo. Another worth while tip here and from this site is make sure you cover the alternator posative or disconnect the batteries.The turbo is a bit of a jiggle to get out and at one point it was hard up against the back of the alternator and you dont want it to be lifting that boot off and earthing out.Split it and this is what I found.



The turbine housing was relatively clean and all the vains were loose with no corrosion.I was suprised as so many on this site find loads of thick soot and gunk in here with tight vains.My truck is a daily driver and does get up to proper temp I also give it plenty on the motorway and its fitted with a bullydog.I the middle of the above photo you can see its light grey and you can see the machining marks on the iron there are very little deposits.The unison ring was siezzed solid and was jammed in the closed position. Ive moved all the vains in the other photo but you can see where they were.



this side is also fairly clean but the ring is tight there is also a crack in ring through the outer edge of the slot that the actuator pin engages in. You can just make it out in the pic.

Ill get some more done this week in the evenings and let you know how I get on.

graham

 

good job my friend, first time taking things apart is the worst, second time is much easyer( cause you know what you doing )soak it in cleaning solution and should help you to get te soot off.
good luck with the rebuild...

BTW nice pix...

 

Unison ring was really tight. Warmed it up evenly with the torch and worked it off. Soot is a grey colour very fine and easy to wipe off not thick and black.Ring is very tight on the inner diameter.The shoulder that it rides on looks like it gets hotter than the rest and is more blistered in appearance.Probably because this shoulder is raised and has a harder time dissipating heat.Now its rubbed down the ring just drops on and I would say it has around 0.002/3" clearance.Turbo bearings are good and very little oil or black in the compressor housing.

 

Nice job, so where do you get Ford parts in England?

 

These trucks are unsupported here.Cheaper for me to ring USA. couple of places here but expensive. In Dollars front pads are $168 Mercon SP $14 a quart Filter kit $84 Moog ball joints $110 each but our Diesel was $11 and is still $9 a gallon.

 

cleaning the turbo didnt work which is suprising as the unison ring was siezed solid.actuator is clean but i did notice that the unison ring actuating crank was very loose. could this have snapped.

 

bit more.
same over boost and turbo fart when vgt actuator is disconnected.actuator shows 5 ohms when hot and supply at idle is 13.6 volts. I thought when the vgt actuator was dissconnected I should have no boost low down or very lazy boost at higher rpm. I just seem to be able to take off well then slow acceleration or no power after 2000rpm. like the vgt is still closed and choking it.also loads of turbo fart at each gear change or throttle chop.

 

If the turbo veins are stuck unplugging the actuator is not going to do anything. Maybe you need to look into buying a new unison ring or even a new turbo. But sounds like you just need a new unison ring.

 

Did you say $9.00 a gallon? I thought here in Canada we had expensive diesel ($.80 liter) Canadian. About $3.20 a gallon, Canadian. Or about $2.50 US.

 

diesel has been coming off a little lately so at fridays exchange rate is now only $7.87 USD