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ASV Turbocharger

 
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chli1976
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Post06-02-2006, 11:13    Subject: ASV Turbocharger Quote

Hello.

Vehicle: Volkswagen Golf IV, year 2000, engine code: ASV.

"The error message in the diagnostic log says 'boost pressure regulation limit exceeded.' (Unfortunately, I don't have the specific error code)."

It is a VTG loader.

Has anyone here ever disassembled a loader like this? The problem is likely due to a stiff adjustment mechanism.

I want to remove the catalytic converter from the exhaust manifold, verschandeln it myself, and eliminate any blockages. Is there anything I need to be careful of?

I recently had a similar problem with a Sharan equipped with an 85 kW pump-injector engine. In that case, I took the turbocharger to a specialized turbo company for repair. The estimated cost of the repair was 400 euros.


Translated on 17-07-2026, 10:29.
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dieselmartin
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Post06-02-2006, 11:17    Subject: ASV Turbocharger Quote

Hi.

Here's a general idea of what you can expect:
http://www.technologie-entwicklung.de/Gasturbines/VNT15-Turbo/vnt15-turbo.html

Otherwise, I would first start by working on the external components, such as the VTG rod, and checking things like the vacuum sensor.

If you detach any of the impeller blades from the shaft, the turbocharger is ruined!
The turbos are individually precision-balanced. And that precise balancing is lost when they are disassembled.

m;
No VTG, small terminals.
Transparency, Teamwork
... there was another T.

I don't know what the f*ck it was.


Translated on 17-07-2026, 10:32.
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matthiasTDI96
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Post06-02-2006, 11:31    Subject: ASV Turbocharger Quote

Hi, I just finished that.

I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

Also wie Martin schon sagt, vorsichtig sein. Wenn du das DIng ausgebaut hast würde ich zusehen, das ich die Ölzulauf und Ablauf Öffnungen verschießen würde, wenn dir da Dreck reinfällt ( von dem gibts viel ) sieht es sicher nicht so gut aus. AUch würde ich den zu und Abgang der Verdichterseite verschließen, denn da gibt es nichts zu machen. Sollte dein Garett so aufgebaut sein wie der auf den Bildern zu sehende KKK ( davon gehe ich aus ) musst du die vier Schrauben mit denen der Turbolader an der Verdichterseite an den Krümmer geschraubt ist lösen und ganz vorsichtig den Lader herausziehen. Du hast dann einmal den Turbolader und zum anderen den Krümmer mit der VTG Verstellung. Die bekommt man mit den 3 Torx lose. IcI put the whole thing into a can with diesel fuel.I applied the adhesive and then cleaned it with the toothbrush ( icon_biggrin.gif ). All parts went together smoothly, except for one adjustable wing. After consulting here, I made it movable again as described with a little force. Then I assembled everything in reverse order and it worked perfectly.

I would only do that if, like with mine, the VTG (Variable Transmission Gear) rod cannot be moved even a millimeter more. Otherwise, I would first try to loosen it while it's still installed. Because, in my opinion, there is always some residual risk involved in disassembling it.


Translated on 17-07-2026, 10:36.
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chli1976
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Post06-02-2006, 12:03    Subject: ASV Turbocharger Quote

Okay, so if we don't interfere with the compressor wheel and turbine blades, then it should be possible to achieve the desired result.

"With the Sharan, it was possible to move the vacuum actuator and adjustment lever using a large syringe. When disassembled, the adjustment lever could be pushed all the way in. I'm not exactly sure what this company did. However, the turbocharger looked like new (with a new exhaust manifold, a new vacuum actuator, but the original housing)."


Translated on 17-07-2026, 10:38.
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matthiasTDI96
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Post06-02-2006, 13:09    Subject: ASV Turbocharger Quote

"Yes, it's crucial to leave the wave untouched. There's no benefit in removing the compressor wheel or the turbine wheel. It should work with a standard variable geometry turbine (VTG) and a sufficiently large syringe for adjusting the vanes. Otherwise, you can also move the gearbox manually while it's installed. This requires overcoming the spring force of the housing. However, this might not provide accurate information about its function."
The turbocharger shown in my pictures actually comes from a Sharan; you can tell by the position of the pressure outlet.


Translated on 17-07-2026, 10:40.
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Post06-02-2006, 22:02    Subject: ASV Turbocharger Quote

Druckdose mußt nicht testen. Die ist in Ordnung! Ohne dies würde dein Lader die Ladedruckregelgrenze nie überschreiten.. Wie schon richtig erwähnt wurde, muß die VTG gereinigt werden. Dazu brauchst aber, wie bereits beschrieben, nicht den ganzen Lader zu zerlegen, sonst hastn Altteil (Schrott!). Du wirst dir beim Ausbau/Einbau von deinem GT1749V nen ziemlich häßlichen machen, weil Du die Krümmer-Lader-Einheit nur komplett ausbauen kannst und unglaublich wenig Platz hast. Also viel Spaß!. Dann ist das Zerlegen, Reinigen und Zusammenbauen der Abgasseite nur noch ein Kinderspiel!. Achte mal bei der Reinigung darauf, ob der Ring mit den Leitschaufeln schon starke Schleifspuren um die Leitschaufeln aufweist. Dann möglichst erneuern. D'wenn der Ring eine spezielle...'The coating significantly reduces the buildup. Otherwise, you'll have the 'pleasure' of complaining about it again sooner or later.


Translated on 17-07-2026, 10:41.
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Post06-02-2006, 22:26    Subject: ASV Turbocharger Quote

Quote:
Druckdose mußt nicht testen. Die ist in Ordnung! Ohne dies würde dein Lader die Ladedruckregelgrenze nie überschreiten..


Objection. I've already handled vacuum-sealed containers that were difficult to open.

Best regards, Rainer.


Translated on 17-07-2026, 10:42.
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