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1974 280C 1991 190E 1986 E-150
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66 Posts
Discussion Starter #1
How do you replace the timing chain guide? I have the top end of the motor dismantled, but need to know where to go from here. Is the timing chain guide plastic? Because when the valve cover was taken off, rail-style plastic with serial number was laying in pieces.


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SLR
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1,366 Posts
Yeah they're plastic, unfortunately. To get to them, you need to pull the front cover off of the motor. To do that, you might have to pull the oil pan off the car too - I know with the 2.3-16 you do. Good luck
 

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Registered
1974 280C 1991 190E 1986 E-150
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66 Posts
Discussion Starter #3
So it's the front of the motor and not the top end? Or leave the valve cover off, and pull the front?


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1992 190E 2.3 8v w/ '87 5-speed and 3.27 rear, 1966 Shelby Cobra 427 S/C, 2018 Triumph Bonneville
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704 Posts
With my 190 at 118K, I was about to ask these questions too. Its a 2.3.

Things to remove:
Valve cover
Front cover
Idler pulley?
Idler pulley shock?
Electro-magnetic clutch?
What else?

Things to replace:
Chain
Tensioner
Rails/guides
What else?
 

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Registered
2000 :W220 - 1986 W201: 16v Nam,16v Euro- 2002:SL500 Silver Arrow.2002:Avalanche-
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2,263 Posts
With my 190 at 118K, I was about to ask these questions too. Its a 2.3.

Things to remove:
Valve cover
Front cover
Idler pulley?
Idler pulley shock?
Electro-magnetic clutch?
What else?

Things to replace:
Chain
Tensioner
Rails/guides
What else?

..........and a trip to MB stealer parts counter for the best of it world : MB gasket sealant uses for critical contact area : Oil pan to F/cover etc...:thumbsup:
 

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Registered
'87 190E 2.3 Manual, '81 500SEL 4whl SLS, '91 300SEL
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1,757 Posts
..........and a trip to MB stealer parts counter for the best of it world : MB gasket sealant uses for critical contact area : Oil pan to F/cover etc...:thumbsup:
I believe Permatex Grey RTV worked well for re-sealing the timing cover on our M103. With the black, it leaked like a sieve.
 

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Registered
89 merceds 190 E 2.6 95 S320W
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26 Posts
im in the process of putting my head back on. i had broke the slide rails. im wondering whats the process of getting the lower part of the front cover off? or at least enough so i can fit the new slide rails back on
 

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Outstanding Contributor Always Remembered RIP
216 with everything. 2002 SL500 with everything. 2009 SL500 with everything.
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6,543 Posts
Do follow the chain tensioner instructions below
 

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