S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

M103 engine question ????

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Old Nov 28, 2009 | 04:14 PM
  #1  
roach_juts's Avatar
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From: entertainment capital of the world, Socal
2000 e430( w210),1979 240D (w123), 1992 300e(w124), 1990 mitsubishi galant VR4
M103 engine question ????

Hello everybody
my 1990 300te with M103 powerplant I hear some knocking sound on acceleration
may on low gears is it possible that I have to change my plugs
rotor distributor cap??
Is there a distributor on for this engine so I can adjust the
timing???

Thanks
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Old Nov 28, 2009 | 07:59 PM
  #2  
ohlord's Avatar
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Change the Cap,rotor and plugs

use only copper plugs no platinums.
Are you burning only premium fuel?
What kind of knock?
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Old Nov 28, 2009 | 08:35 PM
  #3  
roach_juts's Avatar
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From: entertainment capital of the world, Socal
2000 e430( w210),1979 240D (w123), 1992 300e(w124), 1990 mitsubishi galant VR4
hello
10 gal of fuel i get around 150 miles side street, i add engine oil 1qt in a month or 1.5 months

the knocking sounds like a old japanise engine that has a retard timing or negative timing from the distributoron acceleration
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Old Dec 15, 2009 | 12:28 AM
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auser's Avatar
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From: NoVa.
1989 300SE, 2002 FORD Crown Vic Police Interceptor
Do you mean pinging or a mechanical knocking?

The distributor is at the front of the engine and is fixed. All advance and retart is controlled by the EZL ignitor. The timing is adjusted by a resistor plug, I don't know where it is on the W124, this is the W126 forum.
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Old Dec 28, 2009 | 08:00 AM
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don606's Avatar
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From: Russia.Rostov-on-Don
w126 500sel
so the sound is mechanical in nature?
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