Porshe 911 (997). Manual - part 85

 

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Porshe 911 (997). Manual - part 85

 

 

- Preliminary work
- Checking valve guide (valve lateral play)
- Subsequent work

Tools

Designation

Type

Number Explanation

retaining device

special tool

9739

cover for dust protection
when fitting the engine

commercially
available tool

NR.165

Preliminary work

Preliminary work

ATTENTION

Risk of damage due to particles of dirt.

Oil bores/oil ducts can become blocked up.

• 

→ When working on the engine, absolute cleanliness is essential.

→ Lay removed engine parts on a clean base and cover them without fail.

497

→ Use the cover for dust protection when fitting the engine NR.165 on the engine assembly support.

ATTENTION

Incorrect tray.

Damaged and scratched sealing face.

• 

→ Work on cylinder head only on a clean surface on the work bench.

1. Remove cylinder head → 157019 Removing and installing cylinder head - chapter on "Removing".

2. Disassemble cylinder head and clean components → 157037 Disassembling and assembling cylinder head

- chapter on "Disassembling".

Checking valve guide (valve lateral play)

Checking valve guide (valve lateral play)

Tool for fixing valve position

Special tool retaining device 9739

Diagnostic system: reading out fault memory and activating systems

Preliminary work

498

Special tool 9739 fitted

1. Fit special tool retaining device 9739 in cylinder head (valve stem side). To do this, screw in the

fastening screws by hand into the spark plug thread.

Checking valve tilt play of intake valve

Note

The permitted valve tilt play is 0.25 mm.

2. Check valve tilt play on intake valve. Adjust the dial gauge to the relevant angle of the valve to be

checked and set to '0' with preload. Press valve disc towards dial gauge and pull it back again. Read off
value and note it.

Checking valve tilt play on exhaust valve

3. Check valve tilt play on exhaust valve. Adjust the dial gauge to the relevant angle of the valve to be

checked and set to '0' with preload. Press valve disc towards dial gauge and pull it back again. Read off
value and note it.

4. Check all valves.

Subsequent work

Subsequent work

1. When all valve guides are within the permitted tolerances, assemble cylinder head again. If the

specification is exceeded, the cylinder head must be replaced.

Diagnostic system: reading out fault memory and activating systems

Checking valve guide (valve lateral play)

499

2. Install cylinder head → 157019 Removing and installing side cylinder head - chapter on "Installing".

997110, 997111, 997120, 997121, 997310, 997311, 997320, 997321, 997410, 997411, 997430, 997431,
997610, 997611, 997620, 997621

WARNUNG

Gefahr des Verlusts der Text-Bild-Zuordnung beim Ausdruck.

Aus technischen Gründen kann derzeit nicht ausgeschlossen werden, dass trotz
einwandfreier Darstellung auf dem Bildschirm beim Ausdruck der
Zusammenhang von Text und zugehörigem Bild verloren geht.

• 

Wird der Fehler nicht bemerkt, besteht die Gefahr, daß Arbeiten nicht korrekt
durchgeführt werden und es dadurch zu Personen- und Sachschäden kommt.

• 

→ Vergleichen Sie deshalb nach dem Druckvorgang unbedingt die Ausdrucke mit der
Bildschirmdarstellung. Korrigieren Sie die Ausdrucke im Fehlerfall so, daß der Inhalt der
Bildschirmdarstellung zutreffend wiedergegeben wird.

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence
between text and associated figure can be lost when it is printed out, even though
the display on the screen is correct.

• 

If the fault is not noticed, there is the danger that work will not be performed
correctly which can cause injury and damage.

• 

→ Therefore, always compare printouts with the screen display after printing them out. Correct
the printouts if they are faulty so that the content of the screen display matches that on the
printouts.

AVERTISSEMENT

Risque de perte de la correspondance texte-illustration lors de l'impression papier.

Pour des raisons techniques, il ne peut pas être exclu à l'heure actuelle que, même
en cas d'affichage correct à l'écran, la correspondance entre le texte et l'illustration
puisse être erronée sur l'impression papier.

• 

Si l'erreur passe inaperçue, on court le risque d'exécuter certaines opérations de
manière incorrecte pouvant conduire à des dommages corporels et matériels.

• 

→ Comparez impérativement pour cette raison les impressions papier avec l'affichage à l'écran.
Corrigez-les en cas d'erreur de manière à reproduire correctement l'affichage à l'écran.

Diagnostic system: reading out fault memory and activating systems

Subsequent work

500

 

 

 

 

 

 

 

Content   ..  83  84  85  86   ..