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Photo DIY- Engine Compression Testing M113
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Posted 2/5/2015 9:23 PM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
1000
Photo DIY- Engine Compression Testing M113

As part of my 100K Service, I replaced the Spark Plugs. During this procedure, I also Routinely do Compression Testing, as well.

Be sure the Engine is a OPERATING TEMPERATURE, prior to testing. Remember, on the Multi-Plug engines, remove only ONE of the plugs.



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#226610
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Posted 2/6/2015 6:56 AM
DUTCH
Administrator Doppelgänger




Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
5000
RE: Photo DIY- Engine Compression Testing M113

I'm jealous of all the neat toys!
#226616 - in reply to #226610
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Posted 2/6/2015 8:56 AM
NHDave
Extreme Veteran




Date registered: Dec 2013
Location: Seacoast NH.
Vehicle(s): 2004 AMG
Posts: 464
300
Re: Photo DIY- Engine Compression Testing M113

Jealous indeed, look at G-Mans that shop!
I see the need to use the circuit 30 post but didn't see any other cable connected. In this process, is there a need to connect a battery sustainer.

#226619 - in reply to #226610
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Posted 2/6/2015 10:09 AM
jmr89



Date registered: Nov 2012
Location: France
Vehicle(s): Class G W463 320Cab V6 >>Ancien 230 GE Cab 1990
100
Re: Photo DIY- Engine Compression Testing M113

Hat super compression!
#226622 - in reply to #226610
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Posted 2/6/2015 11:29 AM
WEBIII
Extreme Veteran


Date registered: Oct 2010
Location: Inlet Beach, FL
Vehicle(s): 461.318, 463.241
Posts: 315
300
Re: Photo DIY- Engine Compression Testing M113

Assuming the #4 cylinder's rate of degradation continues to outpace the #7, do you have any concern about the deviation between 4 and 7?

Is the #4 cylinder the farthest from the oil pump on an m113?

Thanks for the effort to make all these writeups.
#226626 - in reply to #226610
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Posted 2/6/2015 1:39 PM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
1000
Re: Photo DIY- Engine Compression Testing M113

The Other Connection is with the Adapter placed in Circuit 87. Soooo, you press the Trigger, it allows 12V to go from Circuit 30 post, out to the Starter Solenoid.
#226628 - in reply to #226619
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Posted 2/6/2015 2:00 PM
G-AMG
G-Class DIY Host




Date registered: May 2006
Location: South Texas
Vehicle(s): '04 G55, '80 280GE, '99 S420, '98 E320, 2011 E350
1000
Re: Photo DIY- Engine Compression Testing M113

WEBIII - 2/6/2015 11:29 AM

Assuming the #4 cylinder's rate of degradation continues to outpace the #7, do you have any concern about the deviation between 4 and 7?

Is the #4 cylinder the farthest from the oil pump on an m113?

Thanks for the effort to make all these writeups.


Supposedly, up to 1.5 Bar Variation is "Normal".

To be honest, that #4 was a bit harder to press-in the Rubber cone. I probably should ha used the Screw-In method.
#226630 - in reply to #226626
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