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Home >> Mercedes Benz >> 2020 >> S450 Base >> Repair and Diagnosis >> Engine Mechanical >> Timing Belt >> Engine Timing - 222 Chassis (1 Of 2) >> Testing & Repair >> Remove/Install Timing Chain(s) >> Remove/Install Primary Chain Drive Timing Chain - AR05.10-P-7613MNL

Remove/Install Primary Chain Drive Timing Chain - AR05.10-P-7613MNL

Engine 176 in model 217, 222 

Fig 1: Primary Chain Drive Timing Chain Components Location - Engine 176 In Model 222
G15365817Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
CAUTION Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning 
caused by swallowing engine oil
Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.
AS18.00-Z-0001-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Topical note  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
REMOVINGINSTALLING Remove/install     
1 Remove oil pump chain   AR18.10-P-2145MNL
    INSTALLATION IMPORTANT : Only install upper engine cover and lower engine compartment paneling after the performing a leak test.  
2 Remove secondary chain drive timing chains (8)   AR05.10-P-7614MNL 
3 Remove primary chain drive chain tensioner (4)   AR05.10-P-7802MNL 
    IMPORTANT Remove primary chain drive chain tensioner (4) without positioning crankshaft.  
4 Remove the tensioning rail (5)   AR05.10-P-8130MNL 
5 Remove slide rails (6, 7)   AR05.10-P-8482MNL 
6 Remove primary chain drive timing chain (1) from gears (2, 3) and from crankshaft toothed chain drive INSTALLATION NOTES :
Ensure that primary chain drive timing chain (1) is seated correctly on gears (2, 3) and crankshaft toothed chain drive.
This will otherwise lead to the engine damage.
 
7 Install in the reverse order    
8 Check oil level of engine and correct it    
REFER TO MAINTENANCE     AP18.00-P-1812SKI
WARNING Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
9 Perform an engine test run and check engine for proper operation and leaktightness    
10 Install lower engine compartment paneling   AR61.20-P-1105LF
11 Install upper engine cover