Oh no, please not the turbo again

[gavinwibrow]

Can't do anything until the morning, but would appreciate any advice.
Have just got back from a 5 day 2K round trip to Cape Arid/Esperance.

This morning on the way back I commented to myself how well the beast (TD5) was running and Murphy must have heard my mutterings to myself.

This afternoon, I flattened her to overtook some trucks and noticed a slight hesitation (like bad plugs in a petrol?), then all seemed well again.
A couple of hours later tried another overtake not far from home. Power dropped off, black smoke started coming out the back and the EGT went from 450 up to 600 plus almost immediately so I backed off and I also then noticed boost had gone down to about 0.15. After a quick check and not seeing anything wrong, I then nursed her home. No apparent oil loss, no increase in engine temp or loss of engine oil pressure, but more black smoke and high EGT if I even thought about using a heavy foot.

Although I can't see anything obvious I'm hoping its something simple like a delaminated hose, ALTHOUGH the engine was replaced with a military Defender 40K version about 15K/9 months ago after the turbo self destructed and made some damage to the internals of my 153K original TD5. Repairs including using the 40K turbo, and had all new hoses fitted (including good silicone kit for the turbo), new MAF etc.
I do have a 12 month warranty on the donk, but unsure about the turbo.

[Rok_Dr]

Ouch! I've got my fingers crossed for you that it's not major.

Cheers
Steve

[justinc]

black smoke my guess delaminated or severely leaking pressure (boost) side hose, turbochargers when failing/failed stop inputting boost usually, therefore ECU limits fuel injected therefore lack of black smoke. white or light blue is usually a sign of turbo failure, accompanied by a feeling of acceleration without touching the throttle...:o.

hope it is just a simple hose/ plumbing issue:)

jc

[gavinwibrow]

I'm not quite sure what I'm looking for and cant get hold of my mechanic yet.

I've checked RAVE but can't find a diagram or descriptors for turbo hoses, or for that matter much specific details about the turbo apart from generic stuff,although plenty on coolant hoses etc.

I'm now assuming that silicone hoses are also not impervious to early failure.

Anyone happen to have some/any info before I randomly start pulling bits off?

[OffTrack]

It's very unlikely the silicon hoses will delaminate.
You might find that you've blown a hose off, especially given it's happened when you put the foot down.
Check that both ends of all three turbo hoses are firmly clamped in place.

I doubt it's any of the hoses related to the modulator - I've had the hose from the turbo pipe to the modulator split a couple of times and you get a whistle similar to a failed exhaust manifold, and the engine will over boost.

cheers
Paul

[bob10]

I had a similar problem after I replaced the rubber hoses with silicon , the hose connected to the turbo outlet blew off, just outside Longreach [ it lasted from Brisbane. ] The hoses get very 'greasy' [slippery]. You have to have top shelf clamps to hold them , my symptoms were identical to yours. Bob

[Disco Muppet]

Was thinking you might have blown the hose off last night.

[justinc]

Agree, if silicon yes they get very slippery:(

JC

[justfishing]

Hello Gavin,
Just read your post if you need it I have got my spare turbo here, I am in Perth till Monday I have my daughter's wedding today but could pop over on Friday afternoon to have look if you can wait.
Ian

[gavinwibrow]

SUCCESS - don't you just love this site, or more properly the wonderful people on it.

Ian - many thanks for the generous help offer, but should be OK now.
Justin C - spot on diagnosis as usual.
Paul, Bob and Muppet - after your follow up posts I went back to the wee beastie for a second look. The new silicone hose had shed its shiny clean cramp which was hiding on the shiny Allard ERG kit alongside the end of the hose - I think I need new eyes to have missed that.
I'm about to reconnect the hose (and order a set of the top grade ones for silicone hoses) and (Murphy close your ears) not expecting any problems.
My greatful thanks to all. cheers Gavin

[OffTrack]

SUCCESS - don't you just love this site, or more properly the wonderful people on it.

The new silicone hose had shed its shiny clean cramp which was hiding on the shiny Allard ERG kit alongside the end of the hose - I think I need new eyes to have missed that.

I'm about to reconnect the hose (and order a set of the top grade ones for silicone hoses) and (Murphy close your ears) not expecting any problems.
My greatful thanks to all. cheers Gavin

Good to hear it was something easily fixed. :cool:

This is one of the reasons I like the Samco XDB hoses.

http://www.aulro.com/afvb/attachment.php?attachmentid=59330&stc=1&d=1366250349

They have a section at each end that has one ply less than the rest of the hose. This stops the clamp slipping out of position and also gives better clamping as there is less material under the clip to compress. Even so I had one inadequately tightened clamp blow off soon after I fitted them :angel:

[bob10]

I'm glad it wasn't anything major, after years of near panic when a failure happens, I've learned to start at the most simple reason, & work up. You can't go wrong asking this forum, someone always knows, or can point us in the right direction, Bob

[macksrallye]

While your all thinking about turbos I've noticed my Td5 (99 auto with recently replaced motor & turbo both 140000ish) seems to rub well with decent boost in cool conditions (morning/night) but once it's warm/hot it just doesn't seem to have anywhere near the pull & hunts through th gears. Not black smoke or anything (although it does have a leak in the flexi piece on the downpipe) but after the dramas I've had with it I'm a little cautious.

Any ideas???

[justfishing]

While your all thinking about turbos I've noticed my Td5 (99 auto with recently replaced motor & turbo both 140000ish) seems to rub well with decent boost in cool conditions (morning/night) but once it's warm/hot it just doesn't seem to have anywhere near the pull & hunts through th gears. Not black smoke or anything (although it does have a leak in the flexi piece on the downpipe) but after the dramas I've had with it I'm a little cautious.

Any ideas???

Hello
you should hook up with a electronic diagnostics (nanocom) maybe you MAF is not so good, unplug it to see if there is any difference running.
Ian

[macksrallye]

Thanks Ian, I'll give that a go. Are MAF problems common/expensive?

[Rok_Dr]

In my experience engines will generally perform better in cold/wet conditions rather than hot/dry. That said I would expect a similar performance up untill the mid 30's unless I had a heavy trailer behind me.

A dead MAF is not uncommon but if correctly diagnosed is a 5 minute job to replace. There are plenty of threads here on diagnostics using either a nanocom or multimeter.

Cheers

Steve