2021-2024 Audi Q5 Cylinder Head Oil Leak TSB 2072716/6

Symptoms

Owners of 2021-2024 Audi Q5 models equipped with the 2.0L TFSI (DPVA) engine may observe "oil residue on the cylinder head cover." This condition is often accompanied by "cylinder head cover leaking in the area around the threaded connection (on one or more bolts)." These visible signs indicate a potential issue with the cylinder head cover's sealing integrity.

Technical Background

Audi has identified that in some cases, the cylinder head cover bolts may become loose over time. This loosening can lead to a compromised seal, resulting in oil residue accumulating around the threaded connections of the cylinder head cover. The TSB 2072716/6 addresses this specific issue to prevent further oil leakage and maintain engine integrity.

Important Warnings

Technicians performing this repair must adhere strictly to the guidelines to ensure proper resolution and warranty coverage. Audi advises:

• "Try to reproduce the customer complaint (based on the description/cause of the issue), so that it can be clearly assigned to this TSB. The following repair must only be carried out if all the criteria (model/type, chassis number, engine/motor, gearbox code, PR number(s), part number, software version, code, etc.) apply exactly. Otherwise, this solution will not eliminate the problem and repeat repairs may be necessary. In such a case, the warranty claim may be rejected, and the cost of the parts may be charged back."
• "If the torque wrench does not click after a quarter turn (90°) when checking the bolts are tightened to 14Nm, the affected bolt must be replaced."
• "When re-tightening the bolt(s), the maximum torque of 14 Nm must not be exceeded."
• If several bolts are affected, technicians should "do not loosen them at the same time (i.e. several at once). Please remove, replace, and tighten the volts one by one in order shown in Figure 1."
• The oil separator gasket should be reused if it is not damaged after removal, contrary to some information in ELSA.

Repair Procedure Summary

Addressing the Audi Q5 cylinder head oil leak involves a precise procedure to ensure the cylinder head cover is properly sealed. The repair outlined in TSB 2072716/6 includes the following steps:

1. Initial Inspection: All 22 cylinder head cover bolts must be thoroughly checked for looseness or damage.
2. Oil Separator Removal: The oil separator needs to be removed to access the cylinder head cover bolts. The gasket for the oil separator should be inspected and reused if undamaged.
3. Bolt Replacement: Any loose bolts identified during the inspection must be replaced with new ones.
4. Tightening Procedure: New bolts are to be tightened to a specific torque of 8 Nm + 90°. Existing bolts that were not replaced should be tightened to 14 Nm. It is crucial to follow the tightening sequence shown in Figure 1 of the TSB.
5. Sequential Tightening: If multiple bolts are affected, they must be removed, replaced, and tightened one by one in the specified order to maintain even pressure across the cylinder head cover.

Warranty Information

For eligible vehicles, warranty claims related to this Audi Q5 cylinder head oil leak should be submitted using Service Number 1570 and Damage Code 0050. The claim comment should reference "As per TSB 2072716/6." All warranty claims must comply with the Audi Warranty Policies and Procedures Manual. If the vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance for diagnosis and repair.

Production Solution

Audi has implemented a production solution to address this issue. Vehicles with a production date of May 2024 or later, identified by production number WA1GAAFY6R2117575, incorporate improvements to prevent the cylinder head cover bolts from becoming loose.

Source: NHTSA ID 11017622