cjj
Part of things
Posts: 275
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Recently had turbo failure on my old diesel (Volvo D5). Didn't let it run long at all (100 yards at most) once it started chucking out blue smoke, so as to avoid filling the intercooler and risking run-on.
Put another turbo on and got everything back together, and it was running fine on the drive for ages - no smoke etc,
Took it out of its first run the other day, and it started throwing out properly bad oil clouds after half a mile to a mile, so turned around and came back. Still throwing it out when I got back, similar to when it failed.
Took the intercooler and all the hoses off today and there wasn't really anything in there to cause that level of fuss. Put it all back together and, again, had it running on the drive for a good hour or so - rev'd it when warm, including letting it spool up - nothing coming out of the back.
I'm going to assume it's residual oil in the exhaust, and the exhaust simply doesn't get warm unless it's being driven.
Smoked really badly out the back of the car last time, so I'm really reluctant to take it on a run. Never had turbo failure before, so the aftermath is new to me. Does it sound about right? Any idea how long/much it's going to take to burn it off. Don't mind a little smoke, but this was like a David Bowie concert, so got me rather anxious.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Could be. Maybe heat the exhaust with a blow lamp and see if you get a load of smoke out.
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Davey
Posted a lot
Resident Tyre Nerd.
Posts: 2,319
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Recently had turbo failure on my old diesel (Volvo D5). Didn't let it run long at all (100 yards at most) once it started chucking out blue smoke, so as to avoid filling the intercooler and risking run-on. Put another turbo on and got everything back together, and it was running fine on the drive for ages - no smoke etc, Took it out of its first run the other day, and it started throwing out properly bad oil clouds after half a mile to a mile, so turned around and came back. Still throwing it out when I got back, similar to when it failed. Took the intercooler and all the hoses off today and there wasn't really anything in there to cause that level of fuss. Put it all back together and, again, had it running on the drive for a good hour or so - rev'd it when warm, including letting it spool up - nothing coming out of the back. I'm going to assume it's residual oil in the exhaust, and the exhaust simply doesn't get warm unless it's being driven. Smoked really badly out the back of the car last time, so I'm really reluctant to take it on a run. Never had turbo failure before, so the aftermath is new to me. Does it sound about right? Any idea how long/much it's going to take to burn it off. Don't mind a little smoke, but this was like a David Bowie concert, so got me rather anxious. Just to rule a few things out. What mileage did the initial turbo fail? Was it a new turbo? Did you check the oil feed and return to make sure they where clear? Blocked oil return can force oil through the seals and straight down the exhaust. Could also be the cause for initial failure. Smoke under heavy load? on over run? all the time? It could be excess oil in the exhaust but this will normally burn of pretty quickly.
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K11 Micra x3 - Mk3 astra - Seat Marbella - Mk6 Escort estate - B5 Passat - Alfa 156 estate - E36 compact Mk2 MR2 T-bar - E46 328i - Skoda Superb - Fiat seicento - 6n2 Polo - 6n polo 1.6 - Mk1 GS300 EU8 civic type S - MG ZT cdti - R56 MINI Cooper S - Audi A3 8p - Jaguar XF (X250) - FN2 Civic Type R - Mk2 2.0i Ford Focus
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cjj
Part of things
Posts: 275
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Recently had turbo failure on my old diesel (Volvo D5). Didn't let it run long at all (100 yards at most) once it started chucking out blue smoke, so as to avoid filling the intercooler and risking run-on. Put another turbo on and got everything back together, and it was running fine on the drive for ages - no smoke etc, Took it out of its first run the other day, and it started throwing out properly bad oil clouds after half a mile to a mile, so turned around and came back. Still throwing it out when I got back, similar to when it failed. Took the intercooler and all the hoses off today and there wasn't really anything in there to cause that level of fuss. Put it all back together and, again, had it running on the drive for a good hour or so - rev'd it when warm, including letting it spool up - nothing coming out of the back. I'm going to assume it's residual oil in the exhaust, and the exhaust simply doesn't get warm unless it's being driven. Smoked really badly out the back of the car last time, so I'm really reluctant to take it on a run. Never had turbo failure before, so the aftermath is new to me. Does it sound about right? Any idea how long/much it's going to take to burn it off. Don't mind a little smoke, but this was like a David Bowie concert, so got me rather anxious. Just to rule a few things out. What mileage did the initial turbo fail? Was it a new turbo? Did you check the oil feed and return to make sure they where clear? Blocked oil return can force oil through the seals and straight down the exhaust. Could also be the cause for initial failure. Smoke under heavy load? on over run? all the time? It could be excess oil in the exhaust but this will normally burn of pretty quickly. Near 200k, but I suspect a factor was the sheer amateur bodge job the previous owner made of most tasks on it, which had clearly included removing it at one point. Was a RR member, so I'll not go further! Absolutely no doubts about the failure mode. Bearing was looser than hooker. It was grinding a few miles before it went, so I'd kept the revs low, but didn't smoke at the time. It started smoking straight away when we were due to come back so switched if off and paid a fortune for recovery to avoid any damage or excessive running so as to avoid oil getting in where it shouldn't be. imgur.com/a/xlPGWpUI replaced it with a good used one. No play in the bearing and no signs of seal leakage. I had the oil return off and put new seals on the pipe etc, so saw no signs of blockages - it was something I was conscious of. As I say, I can have it running on the drive for a good hour and not a wisp out of the exhaust. When I took it out, it was smoking constantly after a short drive - even idling, so I was imagining that it was possibly oil stuck in the exhaust.
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Davey
Posted a lot
Resident Tyre Nerd.
Posts: 2,319
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All sounds good, just wanted to rule a few things out.
As long as the smoke isn't looking like imminent runaway then I would be inclined to go for a long gentles drive and see how it goes. Take plenty of oil and stop to check it fairly often, if it isn't using it then its probably exactly as you think.
If the turbo has been on its way out for a while you will now be getting higher exhaust pressure than previously so any oil that's built up in the system could be shifting.
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K11 Micra x3 - Mk3 astra - Seat Marbella - Mk6 Escort estate - B5 Passat - Alfa 156 estate - E36 compact Mk2 MR2 T-bar - E46 328i - Skoda Superb - Fiat seicento - 6n2 Polo - 6n polo 1.6 - Mk1 GS300 EU8 civic type S - MG ZT cdti - R56 MINI Cooper S - Audi A3 8p - Jaguar XF (X250) - FN2 Civic Type R - Mk2 2.0i Ford Focus
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