Oil catch can time.

[MattBLancs]

No flaps here. Actually I will be more precise with terminology as I think I'm confusing (us both equally!)

Above pictures of yours show the VNT turbo.

Quick Google search image:
https://www.google.com/search?q=vnt+tyr ... g6CjIbo7OM


The variable nozzle being created by vanes that sit on other end of the levers that engage with that shaped ring.

I do not believe these ever completely shut (as would effectively choke off the exhaust flow) instead they create a narrow opening (between adjacent blades) accelerating the exhaust gases and firing them at the turbo at an ideal angle - helping spin it.

When boost level is reached vanes open wider = less accelerated, directed gas flow and boost levels off.

Further boost detected would cause blades to open yet further and contribute little to spinning the turbine.

In this way, there's no need for a conventional wastegate.


By comparison, conventional turbo makes boost as soon as the turbine spinning fast enough. Excess boost prevented by opening the wastegate (just a crude round flap on an arm) which bypasses the turbine completely.

On a normal turbo it's important the wastegate is properly shut (to allow boost to be generated by flow through turbine) but also to open fully when required to avoid "boost creep" when wastegate isn't flowing enough to calm the turbine down.

As such I think it's a different "Goldilocks spot" we are seeking with a VNT turbo actuator.

Matt

[Huskyxantia]

Very impressive Matt, I've just been out for a drive i the car and to be honest its still seems to have a slight flat spot but when it picks up it picks up if you no what i mean, the waste gate arm might need a very slight adjustment again till i find that touch im looking for.

[MattBLancs]

Very impressive Matt, I've just been out for a drive i the car and to be honest its still seems to have a slight flat spot but when it picks up it picks up if you no what i mean, the waste gate arm might need a very slight adjustment again till i find that touch im looking for.

Sorry for going into chapter and verse, I tend to dive into the detail as need to understand "how something works" so read into a topic

Yes, pretty much identical to mine - initial performance a bit disappointing, then whooomp really goes.

Pre the turbo going was much more linear, no big turbo surge like presently, so is definitely not 100% correct.

Seems there's an oil leak demanding my attention (it's started marking it's territory) and a new thermostat and temperature sensor housing (doesn't seem to go beyond an indicated 70° of late) so will have a dig into this again soon.

Matt

[Huskyxantia]

Interesting your temperature is sitting as like mine , wonder if the wrong coolant is being used , i tend to use that pink ebay stuff, only cos it stays in the system well for 5 yrs

[Huskyxantia]

Matt if you find the turbo adjustment setting that works pop your findings up on here, as regard the temperature , ive got no air con rad fitted as it was knackered so i thought disconnect get rid more move for the rad more air flow, my temperature will rise but it takes time , but then again diesels take longer to warm up and stay warm for a long whole after switching off, if you find what's keeping yours cool , maybe the thermostat stuck open ? Let us know, and don't worry about going in depth
It will help others when they are trying to solve there car issues

[MattBLancs]

Interesting your temperature is sitting as like mine , wonder if the wrong coolant is being used , i tend to use that pink ebay stuff, only cos it stays in the system well for 5 yrs

Used to sit nearer 80° (including post turbo rebuild) and has been on cheap long life pink stuff for me too - Eurocarparts, bought a big 20 litre drum ages ago, still chugging through it.

Always give a good flush with hosepipe before changing coolant. Actually now I think about it, am probably due another coolant change, so will take some more from the drum when I do the thermostat housing job

[MattBLancs]

Matt if you find the turbo adjustment setting that works pop your findings up on here

Yes, definitely

No Aircon condenser on mine either. DPF heat shield had fretted a hole in the rigid pipework just above the compressor connection. No compressor on the car either now - shorter belt took it out the system. Evaporator coil off when engine came out.

Matt

[Huskyxantia]

What size belt matt, im thinking of removing my ac compressor no need for it.

[MattBLancs]

What size belt matt, im thinking of removing my ac compressor no need for it.

I knew you'd ask that! Will try and have a look tomorrow.
Matt

VNT actuator adjustment:
To save me watching the video I posted earlier again: they quoted 15-18 inches of mercury= actuator pulls vanes to full extent. Under boosting = actuator needs shortening. Overboosting = needs to be longer.
Will keep researching....

[Huskyxantia]

Nice one matt,
Heres the little 206cc , taken by me this morning.

[Huskyxantia]

Just to get back to the oil catch can thing, i have said parts to fit one . But not sure if i should. I've an oil leak which is seeping through the rocker valve cover to air duct and thats even changing the cover for new and a thicker o ring, the oil sits near the injector which i thought was leaking, I've brought new complete seal kit plus studs and nuts all new just incase, just a tad over £23 . There if needed.

[Huskyxantia]

Simple test ,

[Huskyxantia]

Now , oil catch can stuff.

Dont think my 206cc has enough engine bay room !

[Huskyxantia]

Good video

[Huskyxantia]

The 206 has had an oil puddle which i suspected could of been and actual injector seal. So with that plans to repair a puncture on a ride on were shelved and the injector issue was taken on.

So we all know the drill move all pipe work out the way take off the valve cover to get better room to wiggle what needs wiggling , and once all is moved i got the offending injector out it was gunked up to the hills ! The copper washer was so flat im surprised the leak wasn't worse. I cleaned the hole re cut the seating as to make it nice and flat all swarf out nice bright shiny alloy ! Put my shades on... so on went the washer the color and the sleeve , or big black rubber washer thing .. 20 mins later everything back, the car fired into life it sounded a little quieter too it ran up to operating temp and no sign of any leakage. Ive just checked the tyre appointment im job number 10 fitter is at job number 9 so not long now ! Tyres are being changed due to there age there cracked badly and one looks like it has part of the tread missing.

Different motor but same principle ,and a pretty good video ill post this as it might help someone in the future.