vinkodex.PD TDI: the injector seat works loose, cylinder head damage
It does not show up on every car. Check before you buy.
critical
severity
not available
mileage
2
sources
2 sources next to the write-up.
The fault
How you spot it
The PD (pump injector) unit is held in the cylinder head by a single side bolt. Over time the seat works itself loose: the mounting slackens, the copper ring no longer seals, and hot combustion gas blows past. First you hear a characteristic "puffing", rhythmic blowing noise from the top of the engine when cold, soot appears under the cam cover, and then the seat surface in the cylinder head erodes. At that point replacing the seal is not enough: the head has to be refurbished or replaced. It affects PD engines between 1998 and 2010, regardless of size.
Which model
Who it affects
The card opens the generation, the engine or the transmission.
Engines and transmissions
Engine
AJM
Engine
AMF
Engine
ARL
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ASZ
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ATD
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ATJ
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AUY
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AVB
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AVF
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AWX
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AXR
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BAY
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BJB
Engine
BKC
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BLS
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BMS
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BNM
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BNV
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BRU
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BWB
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BXE
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BXF
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BXJ
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BSU
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BMM
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AXB
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AXC
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BRR
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BRS
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BSW
vinkodex.Checklist
PD TDI: the injector seat works loose, cylinder head damage
What you would check for this fault. Take it to the car.
Before you buy
Checklist
What you tick stays on this device only.
Sources
How we know
KFZ DietrichPumpe-Düse-Einspritzung: Technik, Symptome, DiagnosePD-TDI von VAG erklärt: Funktionsprinzip pro Zylinder, typische Themen an Düsen, Element und Verkabelung im Ventildeckel sowie der Diagnoseweg.
AUTO BILDLeistungsverluste und Kopfschäden - AUTO BILDVW stellt seine Diesel auf Common-Rail-Technik um, doch die Probleme mit den Pumpe-Düse-Motoren nehmen kein Ende. AUTO BILD recherchierte die Ursachen – und stellte VW zur Rede.
Information, not an expert opinion
We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.
- A fault on the list does not mean the car you are looking at has it.
- A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
- You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.