It never rains but it pours - New Problem

mikeyskona · Aug 21st, 2010, 22:24

Ok. So a little rough running on occasion and an annoying rattle, which i thought was my wastegate actuator arm again. So, took my heatsheild off again to have a look. Nope. Not the arm, but some escaping air.

Have a looksee at the attached pic. New headache to deal with

How much do you reckon i'm looking for a new one? Not worth welding a patch over? Guessing if that's cracked the internals are gonna be just as bad.

Any ideas are gratefully received

andy_d · Aug 21st, 2010, 22:59

i take it that was the turbo ,,,,

depending on what you find when you take it off, you might get away with ally weld if the internals are all ok,,,unf its one of those moments where to fully asses it tis pull it off time.
then cus or phew depending on what you find (or dont find) in there.....

mikeyskona · Aug 21st, 2010, 23:06

Yep. I Think you might be right there. It answers a few of my rich running and sometimes iffy running problems i think.. cause there's the air leak.. Car thinks it's getting more air than the engine actually is.... adjusts fuel accordingly... Figues still out, Car thinks WTF?.... All makes much more sense now, lol

Looks like i'll be pulling it out at some time this weekend. Let's just hope the bolts aren't seized lol

andy_d · Aug 21st, 2010, 23:14

yes , it stands a very good chance of having quite a bit to do with the "err" fueling.
the leak/hole is well past the maf point, going to throw out any maf determined settings, even those from a non gen maf are going to get fudged one way or the other by said hole.
lambda sensors will be the first place the ecu realises the mix is wrong,adjusts with referance to maf reading,,and depending on temp of engine theres the chance the hole size changes as the casting heats/cools.. i think between said hole + non gen maf they could be both semi responsible for the intermittant iffy running

scottishvolvo · Aug 21st, 2010, 23:14

Not sure if this might be a solution, different units, but if the casings are the same, I've got one from a '98 2.0T you can have.

mikeyskona · Aug 21st, 2010, 23:20

Quote:

Originally Posted by scottishvolvo

Not sure if this might be a solution, different units, but if the casings are the same, I've got one from a '98 2.0T you can have.

Thanks Scottish, but they are different units. The 2.0T is LPT and the T4 is using the 14T turbo, i dont think any of the bits are interchangable.

Thanks anyway

.

Baffler · Aug 22nd, 2010, 02:46

I'd say that's nothing, but, I'm comparing to the turbo I replaced on my T4. I have no exterior pics, as they're on a different pc, but if you take a look on this thread you'll get my meaning.

A bit of weld over the suspected crack should suffice as a temporary measure. Hopefully you won't need to remove the turbo to do so...

mikeyskona · Aug 22nd, 2010, 03:03

Quote:

Originally Posted by Baffler

A bit of weld over the suspected crack should suffice as a temporary measure. Hopefully you won't need to remove the turbo to do so...

Thanks Baffler, that's re-assuring to know. I think that's the approach i'll be taking, for the moment anyway until funds allow different, or i decide to give up and just get a better T4.

Ok, that one you took pics of really does look bad!. lol. Mine still seems to be boosting correctly, i wouldn't have even noticed if it wasn't for the annoying rattle (which i thought was the actuator arm but that's tight as hell, so that leaves me with that air leak rattling the heat sheild, or something else in that kinda area).

Times like this I wish i still had my welders :\ No chance of borrowing a mig so i guess i'm gonna have to have a crack with arc (i hate arc!) lol

Baffler · Aug 22nd, 2010, 03:22

The funny thing about it is that one was boosting just as good as the new one I installed

There must be some firm in your surrounding area, pop in on a lunch break, that can throw a weld across that? Be sure to disconnect the battery whilst doing so

mikeyskona · Aug 22nd, 2010, 03:36

Quote:

Originally Posted by Baffler

The funny thing about it is that one was boosting just as good as the new one I installed

There must be some firm in your surrounding area, pop in on a lunch break, that can throw a weld across that? Be sure to disconnect the battery whilst doing so

Yep.... I learned that one the first car i welded..... Fried all sorts of electrics cause i forgot to disconnect the battery!.

I think i may just do that baffler. Thanks man

.

Aug 21st, 2010, 22:59	#2
andy_d Premier Member Last Online: Apr 24th, 2024 21:26 Join Date: Aug 2009 Location: birmingham	i take it that was the turbo ,,,, depending on what you find when you take it off, you might get away with ally weld if the internals are all ok,,,unf its one of those moments where to fully asses it tis pull it off time. then cus or phew depending on what you find (or dont find) in there..... __________________ 940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "."

Aug 21st, 2010, 23:06	#3
mikeyskona Premier Member Last Online: Aug 24th, 2012 12:10 Join Date: Jun 2010 Location: Plymouth	Yep. I Think you might be right there. It answers a few of my rich running and sometimes iffy running problems i think.. cause there's the air leak.. Car thinks it's getting more air than the engine actually is.... adjusts fuel accordingly... Figues still out, Car thinks WTF?.... All makes much more sense now, lol Looks like i'll be pulling it out at some time this weekend. Let's just hope the bolts aren't seized lol __________________ [gone]98 V40 - T4 CD[/gone] [mine]Renault Laguna II Tractor[/mine] [theMrs]97 V70 2.5 turbo AWD[/theMrs]

Aug 21st, 2010, 23:14	#4
andy_d Premier Member Last Online: Apr 24th, 2024 21:26 Join Date: Aug 2009 Location: birmingham	yes , it stands a very good chance of having quite a bit to do with the "err" fueling. the leak/hole is well past the maf point, going to throw out any maf determined settings, even those from a non gen maf are going to get fudged one way or the other by said hole. lambda sensors will be the first place the ecu realises the mix is wrong,adjusts with referance to maf reading,,and depending on temp of engine theres the chance the hole size changes as the casting heats/cools.. i think between said hole + non gen maf they could be both semi responsible for the intermittant iffy running __________________ 940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "."

Aug 21st, 2010, 23:14	#5
scottishvolvo Premier Member Last Online: Nov 17th, 2023 00:15 Join Date: Dec 2004 Location: Glasgow	Not sure if this might be a solution, different units, but if the casings are the same, I've got one from a '98 2.0T you can have. __________________ Chris '98 S40 2.0T..Gone. 2000 S40 2.0 SE Auto and loving it. 2014 V40 Cross Country Please consider registering with the Anthony Nolan Trust, you could save a life.

Aug 22nd, 2010, 02:46	#7
Baffler Premier Member Last Online: Today 21:18 Join Date: Dec 2002 Location: Co. Limerick, Ireland	I'd say that's nothing, but, I'm comparing to the turbo I replaced on my T4. I have no exterior pics, as they're on a different pc, but if you take a look on this thread you'll get my meaning. A bit of weld over the suspected crack should suffice as a temporary measure. Hopefully you won't need to remove the turbo to do so... __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

Aug 22nd, 2010, 03:22	#9
Baffler Premier Member Last Online: Today 21:18 Join Date: Dec 2002 Location: Co. Limerick, Ireland	The funny thing about it is that one was boosting just as good as the new one I installed There must be some firm in your surrounding area, pop in on a lunch break, that can throw a weld across that? Be sure to disconnect the battery whilst doing so __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav. Last edited by Baffler; Aug 22nd, 2010 at 03:24.

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