darcher93
If I bypass the TCV and run a line from the manifold to the wastegate, what happens to the compressor line and intake still connected to the TCV? Wouldn't that create a vacuum leak at the TCV from the open nipple where the wastegate line was? Or do I just plug that line?
jamesinc
darcher93;c-144508 wroteIf I bypass the TCV and run a line from the manifold to the wastegate, what happens to the compressor line and intake still connected to the TCV? Wouldn't that create a vacuum leak at the TCV from the open nipple where the wastegate line was? Or do I just plug that line?
Block blue, join red to yellow
darcher93
Okay, so join red to yellow and block blue. Should I unplug the TCV as wouldn't it throw a code?
Ex850R
Put all new silicone lines in and get new cbv and maybe a new valve release thing.
jamesinc
darcher93;c-144518 wroteOkay, so join red to yellow and block blue. Should I unplug the TCV as wouldn't it throw a code?
Not sure about codes.
darcher93
Will give it a crack and report back.
darcher93
Update. On a completely unrelated matter, I pulled the catalytic converter off this morning as it was quite noisy. Anyway, guess what I found tucked away inside the cat? The wastegate valve! I would imagine that at some point the wastegate valve has snapped clean off and been cycled through the exhaust, hence the lack of boost and noisy cat.
Now the question becomes, what are my options in terms of fixing the broken valve? Is my only option to replace the turbo itself or is there a cheaper fix for this? As it stands, the wastegate is now permanently open.
Philia_Bear
darcher93;c-144714 wroteUpdate. On a completely unrelated matter, I pulled the catalytic converter off this morning as it was quite noisy. Anyway, guess what I found tucked away inside the cat? The wastegate valve! I would imagine that at some point the wastegate valve has snapped clean off and been cycled through the exhaust, hence the lack of boost and noisy cat.
Now the question becomes, what are my options in terms of fixing the broken valve? Is my only option to replace the turbo itself or is there a cheaper fix for this? As it stands, the wastegate is now permanently open.
Lols!
Hotside only is available on eBay
@Spac may have a few spares as well
Ghettobird
Holy cow!
Kel's T4 makes about 15PSI at WOT, We also blocked her CBV off because I didnt have a diaphragm for it at the time.
https://ozvolvo.org/discussion/8515/kellys-s40-t4-super-tourer#latest
@VPT02 Mark Richardson found a few new SNABB block off plates he had in stock a few weeks ago if you want a premade one.
Fix the turbo, do the usual x40 items and enjoy it. I drive Kel's every chance I get
darcher93
Alright guys. Another update. Thanks to @Vee_Que I now have a turbo ready to go on, but I am having trouble getting the old one off. Every bolt and hose is off except the oil return coming from the sump. This is held on by two torx 30s and in a very awkward and tight spot. Can I just pull the return line off from the sump?
darcher93
All is well. I managed to pull the return line out from the sump. New turbo is in. Just got two more screws attaching to the block, then hoses and its done. Will hopefully get it up and running again tomorrow
darcher93
Turbo is up and running. Smells like something is burning oil though. My boost gauge stopped working the other day so can't measure boost. But given that the fuel keeps cutting on WOT and the wastegate is wound all the way back, I'm gonna assume that the boost is way too high. Need to adjust the wastegate arm and see if there are any leaks. Any thoughts on the boost gauge? I can't spot any leaks so not sure...
Vee_Que
Hose will be off either under the dash or in the engine bay?
darcher93
I checked and the hose is still connected both at to the gauge and at the tee junction. Will take a better look tomorrow to see if it has developed some kind of leak
Ghettobird
Sort out that fuel cut before you kill it, x40s boost calibration is different to on the 850s, you need a working boost gauge and need to adjust the wastegate arm accordingly, I have the exact numbers at the shop but iirc its about 15ish psi at a certain RPM
Also id check your fuel pressure at the rail as these cars have a habit of eating fuel pressure regs and manifold/intercooler boost pressure sensors.
darcher93
Okay, so I've wound the wastgate forward and there is no more boost cut. Just gotta figure out what's wrong with this boost gauge :/
timbo
Is it an analogue or digital boost gauge?
darcher93
Analogue. There doesn't appear to be any leaks though. The gauge could just be fried.
darcher93
Alright. Boost gauge is fixed. Turns out there was a kink in the line behind the gauge cup. As for the oil leak, the o ring has popped out from the oil return line to the sump so will have to try and get that back in tomorrow when the car is not so hot.
