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Home >> Mercedes Benz >> 1996 >> E320 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Timing - 210 Chassis >> Testing & Repair >> Remove/install valve springs and / or valve stem seals - AR05.30-P-3500B

Remove/install valve springs and / or valve stem seals - AR05.30-P-3500B

ENGINE 112.945 in MODELS 463.209 /232 /233 /244 /245 /250 

ENGINE 112 in MODELS 129, 163 

ENGINE 113.962 in MODELS 463.206 /240 /241 /247 /248 /249 /254 

ENGINE 113 in MODELS 129, 163, 202, 208, 210 

ENGINE 113.982 in MODELS 463.243 /246 

Fig 1: Identifying Valve Springs And / Or Valve Stem Seals Components - Shown On Engine 112 In Model 129
G04605803

Shown on ENGINE 112 in MODEL 129 

Fig 2: Identifying Valve Springs And / Or Valve Stem Seals Components - Shown On Engine 112 (1 Of 2)
G04605804

Shown on engine 112 

Shown on engine 112 

Fig 3: Identifying Valve Springs And / Or Valve Stem Seals Components - Shown On Engine 112 (2 Of 2)
G04605805
REMOVINGINSTALLING Remove/install    
1 Remove engine cover or air filter Remove engine trim panel or air filter by pulling it vertically up and off the cylinder head covers.  
2 Remove viscous fan (1) IMPORTANT Right-hand thread! AR20.40-P-5660C
3 Fan shroud (2) IMPORTANT On model 163 unscrew bolts at bottom of fan shroud.  
Models 163. AR20.40-P-5000GH
Model 463. AR20.40-P-6800V
4 Remove poly-V-belt (3) IMPORTANTInstallation:  Lock tensioning device with a drift or pin (diameter 5 mm). AR13.22-P-1202B
5 Remove cylinder head covers (6) Air filter located at vehicle side. AR01.20-P-5014B
Air filter located on engine side. AR01.20-P-5014BV
6
REFER TO MAINTENANCE		 Remove spark plugs (8) IMPORTANT Only one spark plug at each cylinder.  
Models 163. AP15.10-P-1580GH
Models 129, 202, 208, 210. AP15.10-P-1580A
Model 463. AP15.10-P-1580GA
7 Remove intake manifold (7) IMPORTANT The intake manifold system must not be disassembled.
IMPORTANT Remove intake manifold together with fuel rail.		  
Models 129, 163, 202, 208, 210. AR09.20-P-1310A
Model 463. AR09.20-P-1310AG
8 Position crankshaft to 40° after ignition TDC of cylinder 1 IMPORTANT Engine must not be cranked back! AR05.10-P-6858V 
9 Remove chain tensioner (5)   AR05.10-P-7800C 
10 Remove camshaft position sensor (11)   AR15.10-P-2000A
11 Remove camshaft sprockets (10) IMPORTANT Lock right and left camshaft with locating plates.  
SPECIAL TOOL Locating plate Figure
SPECIAL TOOL Locating plate Figure
SPECIAL TOOL Open-end wrench Figure
SPECIAL TOOL Insertion tool Figure
SPECIAL TOOL Torque wrench 001589722100
TORQUE SPECIFICATION *BA05.20-P-1001-01B 
After installation: ↓  
Inspect timing of engine. AR05.10-P-6858V 
↓ If necessary after checking:  
Set basic position of camshafts. AR05.20-P-6020AU 
12 Remove camshaft bearing bridges (9) Engines 112, 113 except code (479) Cylinder shutoff. AR05.20-P-7103AU 
Engine 113 with code (479) cylinder shutoff. AR05.20-P-7103AV
13 Position piston of cylinder to be processed to TDC IMPORTANT Crank engine at crankshaft for this purpose and hold up timing chain (so that it does not jam).
IMPORTANTInstallation:  Before installing the camshaft sprockets, again turn back the crankshaft in the starting position to 40 ° as per ignition TDC at the first cylinder.		  
14 Install retaining lock (13) for crankshaft IMPORTANT After setting TDC of cylinder to be processed, in order to prevent crankshaft turning further. AR03.30-P-5000B
15 Connect up cylinder leak tester (12) COMMERCIALLY AVAILABLE TOOLS Turn connection hose of cylinder leak tester into the relevant spark plug hole. *WH58.30-Z-1015-05A 
16 Pressurize compression chamber With a pressure of about 5 bar.  
17 Screw retaining fork and detent with hinged bearing into cylinder head SPECIAL TOOL Valve assembly tools case Fig 9
18 Attach detent depresser with lever handle and thrust piece into detent with hinged bearing, align IMPORTANT Position thrust piece vertically at valve spring retainer and align parallel to detent with hinged bearing.
SPECIAL TOOL Valve assembly tools case		 Fig 9
19 Remove upper valve spring plate (16) and valve spring (17) NOTES Do not allow valves to touch the piston crowns otherwise they will be bent.
IMPORTANT Compress valve spring and remove valve collets with tweezers or magnetic finger. The valve springs of the inlet and exhaust valves are identical.		  
    SPECIAL TOOL Magnetic finger Fig 10
    COMMERCIALLY AVAILABLE TOOLS Tweezers *WH58.30-Z-1040-02A 
20 Replace valve stem seals (18) IMPORTANT Inspect surface of valve stems for roughness and formation of burrs (visual inspection or with a nail). Replace valves with a rough stem surface or formation of burrs: ↓ AR05.30-P-3500-02A 
Remove valves. AR05.30-P-3511AV 
21 Remove lower valve spring plate (19)    
INSPECT Checking     
22 Inspect top and bottom valve spring retainers (16, 19) IMPORTANT Inspect valve spring retainer for formation of burrs, replace if necessary.  
23 Install in the reverse order    
TORQUE SPECIFICATION Camshaft

Number Designation Engine
112
except
112.951/976		 Engines
113.940/941/
942/943/944/
948/961/962/
963/964/965/
966/967/968/
969/971/980/
981/982/984/
986/992/995
BA05.20-P-1001-01B Bolt for camshaft sprocket M12x45 Stage 1 Nm 50 50
Stage 2 ∠° 90 90
Fig 4: Identifying Locating Plate (112 589 00 32 00)
G04605806
Fig 5: Identifying Locating Plate (112 589 01 32 00)
G04605807
Fig 6: Identifying Open End Wrench (112 589 00 01 00)
G04605808
Fig 7: Identifying Insertion Tool (112 589 01 03 00)
G04605809
Fig 8: Identifying Torque Wrench (001 589 72 21 00)
G04605810
Fig 9: Identifying Valve Assembly Tool Case (111 589 25 61 00)
G04605811
Fig 10: Identifying Magnet Finger (116 589 06 63 00)
G04605812
Commercially available tools

Number Designation
WH58.30-Z-1040-02A Tweezers, straight 160 mm with rounded tips
WH58.30-Z-1015-05A Cylinder leakage testing unit
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