Anyone do a compression test? - MBWorld.org Forums

Mar 5, 2015 | 05:11 PM

Merc63

Thread Starter

MBWorld Fanatic!

Joined: Jan 2009

Posts: 4,563

Likes: 42

C63 AMG

Anyone do a compression test?

What were your results? I got 180psi all around give or take a few psi. Cars been sitting for 5 months. I am not sure if the throttles were opening when I pressed the gas however.

Mar 5, 2015 | 05:22 PM

shardul

Former Vendor of MBWorld

iTrader: (1)

Joined: May 2008

Posts: 12,139

Likes: 295

From: Houston

2003 W211 E55, 2003 W220 S600

as long as the reading form each cylinder are within 5 to 10 % of each other you are fine.

Mar 5, 2015 | 05:45 PM

Merc63

Thread Starter

MBWorld Fanatic!

Joined: Jan 2009

Posts: 4,563

Likes: 42

C63 AMG

I'm aware of the variance between cylinders. Im looking more for a comparision to another engine to see how the rings are doing.

Mar 5, 2015 | 08:21 PM

shardul

Former Vendor of MBWorld

iTrader: (1)

Joined: May 2008

Posts: 12,139

Likes: 295

From: Houston

2003 W211 E55, 2003 W220 S600

Ok got you
I have seen different gauges yield different numbers on same engine on a particular car. But at 180 psi you are in good shape

Mar 6, 2015 | 03:53 AM

bhamg

MBWorld Fanatic!

Joined: Aug 2009

Posts: 2,899

Likes: 93

C63 AMG

180 across the board actually sounds perfect given the compression ratio. So, odds are it's in great shape with respect to that. And IIRC you cleaned out any carbon when the s/c went on so that's not a factor.

Last edited by bhamg; Mar 6, 2015 at 03:57 AM.