Renewing seals on injector: Audi TT Mk2 2.0 (BPY, BWA, CDLA, CDLB, …)

🧭 Before you start

Fits: Audi TT Mk2 (8J, 2006–2014)

• Special tools named: T10133/5, T10133/6, T10133/7, T10133/8, T10133/4
• Renewed: o-ring

Don't miss

• The injector must be renewed if the groove is damaged.
• The illustration shows an injector with "“offset connector”". This can be ignored since it is not relevant when replacing the combustion chamber ring seal.
• The teflon ring is widened as it is pushed onto the injector. The teflon ring must therefore be compressed again after it has been fitted. This is done in two steps. The procedure is described below.
• Fit new O-ring on injector. Lubricate O-ring lightly with clean engine oil before installing.
• The teflon ring must not be lubricated.

🔧 Engine codes this applies to

📋 Procedure

1. Carefully remove old teflon ring using suitable tools (e.g. cut open ring using razor blade, or prise open ring with small screwdriver and then pull off forwards). It is important to ensure that the groove and the continuous ridge in the bottom of the groove are not damaged. [Note: The injector must be renewed if the groove is damaged.]
2. Before new teflon ring is fitted, any combustion residue must be removed from ring groove and injector stem using a clean cloth. [Note: The illustration shows an injector with "“offset connector”". This can be ignored since it is not relevant when replacing the combustion chamber ring seal.]
3. Fit assembly cone T10133/5 with new teflon ring (1) onto injector (2).
4. Use assembly sleeve T10133/6 to press teflon ring further onto assembly cone T10133/5 until it seats in groove. Do not use any lubricants during this procedure. [Note: The teflon ring is widened as it is pushed onto the injector. The teflon ring must therefore be compressed again after it has been fitted. This is done in two steps. The procedure is described below.]
5. Slide calibration sleeve T10133/7 onto injector as far as the stop by pressing lightly and turning approx. 180°. Pull calibration sleeve T10133/7 off again by turning it in the opposite direction.

6. Slide calibration sleeve T10133/8 onto injector as far as the stop by pressing lightly and turning approx. 180°. Pull calibration sleeve T10133/8 off again by turning it in the opposite direction.
7. Fit new O-ring on injector. Lubricate O-ring lightly with clean engine oil before installing.
8. The teflon ring must not be lubricated.
9. Use supplied nylon brush T10133/4 to thoroughly clean holes for injectors in cylinder head prior to installing injectors. [Note: An open inlet valve may prevent cleaning. If so, the engine must be cranked by hand by rotating the crankshaft with a spanner.]
10. Refit support ring (1) on injector and clip radial compensation element (2) onto support ring. [Note: The teflon seal on the injector must not be oiled or greased.Make sure there is no cleaning fluid or oil in the cylinder head bores when installing the injectors.]
11. Push injector by hand as far as it will go into aperture in cylinder head (do not use oil or grease). Ensure that the injector is properly seated in the cylinder head. [Note: It should be possible to insert injector easily. If necessary wait until the combustion chamber ring seal has contracted sufficiently.Note correct installation position and ensure that injectors are properly seated in cylinder head.If the injector cannot be pushed in by hand, use puller T10133/2A(2) with striker T10133/3 to insert the injector.]
12. The remaining installation steps are carried out in the reverse sequence.

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