ra05006010291x

0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603

Typ ra · téma 05.30 · verze 9918 · 1999-04-30

Platí pro:

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 1 Motor › 05 Rozvod motoru › 05.30 Ventily — Řada 601 · Řada 602 (modely 91*, 96*)

Platí také pro motory/převodovky: 603 91*, 603 96*, 603 970, 603 971

05-291 Machining valve seats

Preliminary work:
Cylinder head removed (01-415).
Valve springs removed (05-250).
Valves removed.
Valve guides checked (05-285).

Operation no. of operation texts and work units
or standard texts and flat rates 05-4511

0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603

Valve guides

check (05-285).

Valve seats

machine according to tool manufacturer's operating instructions. See data sheet for settings.

Valve seat

check for leakage (item 3).

Valves

insert and measure dimension "a".

Data

Valve seat

Intake

Exhaust

Valve seat width (b)

1.2-1.7

1.7-2.0

Valve seat angle (a)

45°

45°

Upper correction angle (b)

15°

15°

Bottom correction angle (Y)

65°

65°

Permissible deviation in concentricity of valve seat

0.03

0.03

Min. dimension (a) on new valves and valve seats

0.1-0.5

0.1-0.5

Dimension (a) on remachined valve seats and reground valves

- 1.0

- 1.0

0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603
0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603

Dimension (a) is reduced by the amount the cylinder head face is ground down (see RI 01-418).

Commercially available tools and test equipment 1)

Designation

e.g. company

Order no.

Valve seat turning tool with hand drive

Serdi GmbH
Bregenzer Str. 69
88131 Lindau

SL 1050

Holding device for cylinder head
and valve seat turning device

e.g.
Wall support or
work place or
machining center

Serdi GmbH
Bregenzer Str. 69
88131 Lindau

SL 1100
SL 1200
SL 1300

Forming cutter for

Intake valve seat
Exhaust valve seat

Serdi GmbH
Bregenzer Str. 69
88131 Lindau

41 191
41 192

Vacuum tester for leakage check

Serdi GmbH
Bregenzer Str. 69
88131 Lindau

8000

Motorization

Serdi GmbH
Bregenzer Str. 69
88131 Lindau

SCL 660

1) Other approved valve seat turning equipment and accessories are listed in the catalog "Test Reports for Test Benches and Equipment for Mercedes-Benz Workshops", Volume 1.

Note
With the machining tools listed under commercially available tools the various angles on the valve seat are machined in one operation. Clamp cylinder head in clamping device to disassemble and machine. Machine valve seats with valve seat turning device, with valve seat grinder or valve seat mill.

After machining the valve seat inserts check the installation position of the hydraulic valve clearance compensating elements and correct,
if required (05-211).

It is also necessary to check the distance between the end of the valve stem and base of the camshaft bearing (01-418).

0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603

1 Check valve guide, replace, if required
(05-285).

2 Machine valve seats (see tool manufacturer's operating instructions).

3 Insert valves and check leakage of valve seat with vacuum tester.

0291 - Machining the valve seats Engines 601, 602 (except 602.98), 603

4 Insert valves and measure distance (a).
If dimension (a) is not within tolerance, replace valve seat insert (05-290).

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