VW Touareg repair


+ 1. Operation and car maintenance
- 2. Engine
   + Preliminary checks on the car
   - Mechanical part (petrol engines 3,2L)
      Removal of the power unit
      Removal and installation of the left and right pillows of a support of the engine
      Removal and installation of a conducted disk
      Removal and epiploon installation from a flywheel
      Replacement of an epiploon of a cranked shaft on the party of a damper of krutilny fluctuations
      Replacement of a sealing flange of a cranked shaft on the party of a damper of krutilny fluctuations
      Removal and installation of a cranked shaft
      Removal and installation of a lateral cover
      Removal and installation of a cover of a head of the block of cylinders
      Removal and installation of a head of the block of cylinders
      Check of phases of a gazoraspredeleniye
      Adjustment of phases of a gazoraspredeleniye
      Removal of cam-shafts
      Installation of cam-shafts
      Check of axial shift of cam-shafts
      Marking of cam-shafts
      Replacement of maslosjemny caps
      Check of directing plugs of valves
      Processing of saddles of valves
      Sizes of valves
      Check of pistons, piston rings and diameter of the cylinder
   + Mechanical part (petrol engines 4,2L)
   + Mechanical part (diesel engines 5,0L)
   + Removal and stretcher installation
   + pressurization System (diesel engines)
   + cooling System (petrol engines)
   + cooling System (diesel engines)
   + greasing System (petrol engines)
   + greasing System (diesel engines)
   + injection System (petrol engines)
   + injection System (diesel engines)
   + System of production of the fulfilled gases
   + System топливоподачи (beninovy engines)
   + Tables
+ 3. Transmission
+ 4. Running gear
+ 5. Steering mechanism
+ 6. Brake system
+ 7. Onboard electric equipment
+ 8. Body
+ electric equipment Schemes


Volkswagen Touareg / Touareg repair>> Engine>> Mechanical part (petrol engines 3,2L)>> Processing of saddles of valves
NOTE
At repair of engines with leaky valves process or to replace saddles of valves and valves insufficiently. Especially in engines with long service life it is necessary to check directing plugs of valves on wear.

Saddles of valves follows дообрабатывать only so to reach a faultless type of a working surface. Before processing follows риссчитать the most admissible allowance on processing. At allowance excess on processing function of hydraulic regulation of a gap in a drive of valves (hydrojacks) that will cause GBTs replacement can be broken.
Remove cam-shafts.
Calculate the most admissible allowance on processing as follows:
– insert the valve in directing and densely press it to a saddle;

NOTE
If the valve at repair is replaced, at measurements follows use the new valve.


Fig. 2.85 . A distance between the end of a core of the valve and the upper edge of a head of the block of cylinders


– measure A distance between the end of a core of the valve and the upper edge of a head of the block of cylinders (fig. 2.85) ;
– calculate the most admissible allowance on processing on the basis of the measured distance of A and minimum admissible size.

Minimum sizes

The measured distance of A minus the minimum size = Max. admissible amount of completion.
Example:
The measured distance..... 10,6 mm
Minimum size..... 10,2 mm
The most admissible allowance on processing..... 10,6–10,2=0,4 mm

NOTE
On the following schemes the most admissible allowance on processing of saddles of valves is represented as the size B.

Processing of a saddle of the inlet valve

Fig. 2.86 . Scheme of processing of a saddle of the inlet valve


a–Ж30,6 mm
b–the most admissible amount of operational development
c–0,9–1,5 mm
d–Max. Ж35,0 mm
r2 – radius of 2,0 mm
Z–bottom edge of a head of the block of cylinders
a–45 ° corner of a facet of a saddle of the valve
b–30 ° a corner of the top correcting facet
g–60 ° a corner of the bottom correcting facet

Processing of a saddle of the final valve

Fig. 2.87 . Scheme of processing of a saddle of the final valve


a–Ж26, mm
b–the most admissible amount of operational development
c–1,2–1,7 mm
d–Max. Ж29,0 mm
r2 – radius of 2,0 mm
Z–bottom edge of a head of the block of cylinders
a–45 ° corner of a facet of a saddle of the valve
b–30 ° a corner of the top correcting facet
g–60 ° a corner of the bottom correcting facet


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