1997 MERCEDES-BENZ ML350 Complete Repair Manual

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Page 2353 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Test values for valve seat rings
Shown at exhaust valve seat ring
946/947/948/
951/960/961,
113.940/941/94
2/943/944
BE05.30-P-
1009-03CInlet
valve/exhaust
valve valve seatWidthmm0.8..

Page 2354 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Fig. 124: Identifying Valve Seat Dimensions -Shown At Exhaust Valve Seat Ring
INSPECTING, REMOVING , INSTALLING VALVE GUIDES - AR05.30-P-4511AV
ENGINE 112
ENGINE 112.945 in MODEL 463.209 /232 /23

Page 2355 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Commercially available tools
Workshop equipment
3Machin valve seat
ring in cylinder head
*WE58.40-Z-
1009-21A
*WE58.40-Z-
1010-21A
Observe tool manufacturers operating instructions, mainta

Page 2356 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual 1998-2005 ENGINE
Complete engine - 163 Chassis
GENERAL INFORMATION
DETERMINE LOSS OF PR ESSURE AT CYLINDER - AH01.00-N-1300-02A
All engine
If an increased pressure loss was found with the cyli

1998-2005 ENGINE
Complete engine - 163 Chassis
GENERAL INFORMATION
DETERMINE LOSS OF PR ESSURE AT CYLINDER - AH01.00-N-1300-02A
All engine
If an increased pressure loss was found with the cylinde r leak tightness tester, inspect engine by listening at
cylinder head gasket, air intake area, exhaust, oil fi ller opening and prechamber or spark plug bores of the
adjacent cylinder or cylinders.
Check the coolant in the coolant expansion reservoir for the formation of air bubbles.
Possible causes for the pressure loss are: 1. Outlet of air through prechamber or spark plug bo re of adjacent cylinder or cylinders, air bubbles
in coolant expansion reservoir:
pressure loss at cylinder head gasket
2. Outlet of air through air intake area:
For inspecting by listening, open throttle valve pressure loss at inlet valve(s)
3. Outlet of air through exhaust:
pressure loss at exhaust valve(s)
4. Outlet of air through oil filler opening:
pressure loss through pistons and piston rings
It is possible to pinpoint the pressure loss of the rele vant cylinder by spraying with engine oil. Engine oil
seals off the gap between piston and cylinder briefly.
If a reduced pressure loss now occurs for a short time, th e cause is very likely to be at the pistons, piston rings
or cylinder contact surface of the relevant cylinder.
Determining the cause can be falsified by the position of th e piston ring joints. If suspicion exists that the loss o
f
pressure is caused by the piston ring joints being positioned directly one above the other, fit parts to engine and
repeat test after running engine for a short time.
GENERAL INFORMATION ON INSPECTING CYLINDER WALLS - AH01.00-P-0300-01A

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:55 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.
me
Saturday, October 02, 2010 3:18:01 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.

Page 2357 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Engine 112, 113, 122, 134, 135, 137, 166, 275, 285, 611, 612, 613, 628, 629, 639, 642, 646, 647, 648
Pressure gloss marks, smoothings
Individual blank points, e.g. in the middle of th e cylinde

Page 2358 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual This manual is sold and compiled by
Fixyourcar2008@aol.com. Duplication and resell is not
permitted.

Page 2359 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual Fig. 2: Identifying Visible Mottling And Friction Marks On Cylinder Walls
Ring shaped imprints
Visible imprints on cylinder barrel in the upper and lo wer reverse area of piston rings are not

Page 2360 of 4133

MERCEDES-BENZ ML350 1997 Complete Repair Manual The cylinder barrel is unusable.
Fig. 4: Identifying Cylinder Wear

Roughened mottling, friction scoring
Starting from first and second piston ring, tapering to an end only in bottom part

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