Thread: Turbo worn?

obviously the first things to check would be all the lines to and from turbo, for leaks.

I'd be inclined to test for the ability to get more boost with an adjustment, before laying out $s for a new turbo/cartridge.

How much slack is in the turbine when you reach in and move it by hand.

Is that boost reading at 3K RPM with the pedal hard to the floor(or close to it).

boost is dependent on demand, not just RPM.
You can rev to 3K and still only see 4 or 5 Psi boost.

My maximum boost comes in at 20Psi just a touch over (3250-3500RPM).
I think at 3K RPM I see about 16-ish(max) or close to it with foot almost at the floor.

I reckon I'm in a similar boat, but I have no idea what boost I'm running because I don't have a gauge...I want one though so I can see what it's doing.

Someone on the forum was telling me about these:

Land Rover 300 TDi Upgrade Kit | Facebook

It sounded like it's just Land Rover bits but basically new ones that aren't worn at all...and they're shiny Sounded really good, just didn't have the money and I wasn't sure if I needed it but it did sound like a great idea instead of putting something on it that will overtax things.

I was just up all through the High Country last long weekend and it really struggled on the highway as soon as I hit even the slightest incline, and apart from my roof rack I didn't have anything on the roof, I've even got D-Gas and it's got low kms. I'll be in 5th coming down a decline and it'll fang up to 120 if I let it very easily, but as soon as even the slightest incline starts it just drops down to 80 and I have to drop down to 4th and I can probably hold on about 80km/h and maybe creep faster but not much. It's got a bit of gear in it, but nothing crazy, and no trailer.

I need to get a boost gauge on it and see what it's doing, I am hearing a whistle when going fast which may be a hole in a hose somewhere but I haven't found it yet. You can only hear that whistle when speed is up above 80km/h.

Originally Posted by Young Angus

....

I need to get a boost gauge on it and see what it's doing, I am hearing a whistle when going fast which may be a hole in a hose somewhere but I haven't found it yet. You can only hear that whistle when speed is up above 80km/h.

Yeah boost gauge is good for various health check/observations.

eg. if a hose splits ever so slightly where you just lose a teeny amount of boost compared to what you normally see, a boost gauge will show you this, whereas a non boost gauge won't!

And did you say you have an EGT gauge fitted? what kind of temps are you getting?

As for the whistle .. those small boost hoses are all probably fairly old now .. could be a wise move to 'preventatively' replace them before they all start to slowly perish and cause annoyance at inconvenient moments!

Originally Posted by AK83

Yeah boost gauge is good for various health check/observations.

eg. if a hose splits ever so slightly where you just lose a teeny amount of boost compared to what you normally see, a boost gauge will show you this, whereas a non boost gauge won't!

And did you say you have an EGT gauge fitted? what kind of temps are you getting?

As for the whistle .. those small boost hoses are all probably fairly old now .. could be a wise move to 'preventatively' replace them before they all start to slowly perish and cause annoyance at inconvenient moments!

Ahh yes I forgot the EGTs, probably an important bit of info that.

I'd be cruising at high speeds (not a hot day) on a flat or downhill and get around 400 on the EGT as the lowest. As soon as I'd hit an incline this would start to get pretty high if I stayed in 5th shooting up to 600 pretty quick, I'd drop down to 4th and try to maintain some kind of speed and it would stabilise but still around that 550 to 600 mark and then it would start to go up if I tried to keep speed up the incline. A few times it would get up to 680 easily and then I'd back off pretty quick and just resign to the hill beating me and go slower.

I'm happy to take things slow if I need to, but with the D-Gas and the fact I'm not towing I'm not understanding why it seems to be struggling so much. I'm sure it used to be better years ago.

Oh and I'm pretty sure most of the hoses were just replaced with new ones, so not sure if there's something somewhere that is causing a whistle but I'm also sure it wasn't there before at high speeds.

EGTs sound ok, I'd be looking at a set of silicone intake hoses (not the real cheapies from eBay), before I bought a boost gauge. Sounds a lot like hoses delaminating on the inside, or small splits (usually in the hardest to find areas).

As a reference point for 'ya Ben:

I get this both on the run up Pentland Hills(basically all the time, except really cold(~ 10°C days) and the Craigieburn bypass(but only with a strong headwind!)

If I keep foot down, I'll eventually see about 720°C on mine now(I've tweaked injection pump). Before IP tweak, I'd max at about 650°C
In both the above scenarios I'll maintain 100k/h relatively easily .. maybe 95-ish on the steeper section of Pentland Hills.

If I just back off a smidge to about 90-85(ish) it drops to the high 600's.
All info on the tdi is that 700 is a maximum safe limit .. obviously you don't want to run it that hot all the time tho(I think).

As your scenario of flat roads, in most conditions: I see about 450-ish.

As I was getting overly warm(actually too hot for my liking) coolant temp with the AC on a very hot day(40-ish) .. I removed the front grille.
Coolant temps dropped to much better levels(mid - high 90's max), but the drop in EGT surprised me more.
Approx 50°C drop in the conditions I reiterated above.

First time I've driven the Pentland hills in 4th(auto) without having to drop to 3rd and 80(odd) k/h due to EGT.

If I reduce the fuelling on the IP, I then don't have enough power to maintain above 80k/h in top, where it drops out of torque converter lockup.
With the lower IP fuelling it goes into a repetitive loop dropping to 3rd unlocked, then back into 4th locked, and so on. Really annoying!

ps. if you need a hand again some time to check for that whistling noise, shoot me a PM to txt, see if we can catch up to check stuff for 'ya.
Sometimes I have free time on Thu, Fri or alternating weekends.

Originally Posted by AK83

As a reference point for 'ya Ben:

I get this both on the run up Pentland Hills(basically all the time, except really cold(~ 10°C days) and the Craigieburn bypass(but only with a strong headwind!)

If I keep foot down, I'll eventually see about 720°C on mine now(I've tweaked injection pump). Before IP tweak, I'd max at about 650°C
In both the above scenarios I'll maintain 100k/h relatively easily .. maybe 95-ish on the steeper section of Pentland Hills.

If I just back off a smidge to about 90-85(ish) it drops to the high 600's.
All info on the tdi is that 700 is a maximum safe limit .. obviously you don't want to run it that hot all the time tho(I think).

As your scenario of flat roads, in most conditions: I see about 450-ish.

As I was getting overly warm(actually too hot for my liking) coolant temp with the AC on a very hot day(40-ish) .. I removed the front grille.
Coolant temps dropped to much better levels(mid - high 90's max), but the drop in EGT surprised me more.
Approx 50°C drop in the conditions I reiterated above.

First time I've driven the Pentland hills in 4th(auto) without having to drop to 3rd and 80(odd) k/h due to EGT.

If I reduce the fuelling on the IP, I then don't have enough power to maintain above 80k/h in top, where it drops out of torque converter lockup.
With the lower IP fuelling it goes into a repetitive loop dropping to 3rd unlocked, then back into 4th locked, and so on. Really annoying!

ps. if you need a hand again some time to check for that whistling noise, shoot me a PM to txt, see if we can catch up to check stuff for 'ya.
Sometimes I have free time on Thu, Fri or alternating weekends.

Cheers Arthur, might just have to take you up on that again, would be good for a catch up too and hell we should go hit some tracks that aren't too far from Melbourne on a weekend day trip sometime.

Oh, sorry about the hijack

More hijacking...does anyone elses blue silicon hose have a big piece of non silicon between two smaller pieces of blue hose, one at the turbo and one at the bottom of the intercooler?

Looks like there is a nick in this piece of what looks like pipe too.

Is this normal?