y, May 10, 2008 1:07 PM
To: Mercedes Discussion List
Subject: Re: [MBZ] W123 300D losing compression??
Engine was bored to 91.5mm ( Yes it is allowed check EPC and Mercedes
OEM
piston A6170301917 ) was used. HEad was redone using only OEM parts ,
including new guides all round . Oil consumption ha
If the rings are bad, you will have tremendous blowby. If you don't,
likely the valves are bad, much cheaper.
Peter
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> On Behalf Of Peter Merle
> Sent: Saturday, May 10, 2008 1:07 PM
> To: Mercedes Discussion List
> Subject: Re: [MBZ] W123 300D losing compression??
>
> Engine was bored to 91.5mm ( Yes it is allowed check EPC and Mercedes OEM
> pist
] W123 300D losing compression??
Engine was bored to 91.5mm ( Yes it is allowed check EPC and Mercedes OEM
piston A6170301917 ) was used. HEad was redone using only OEM parts ,
including new guides all round . Oil consumption has increased from and
initial 0.2 to approx 0.5 l /1000 km. Engineering shop
Check valve clearance, then run a few hundred km and check again --
if they close up, you nee to have them set "loose" and recheck each
few hundred km until they quit closing up, then set to spec. Carbon
builds up on the valve stems and will prevent them from fully closing
if the clearance
Engine was bored to 91.5mm ( Yes it is allowed check EPC and Mercedes OEM
piston A6170301917 ) was used. HEad was redone using only OEM parts ,
including new guides all round . Oil consumption has increased from and
initial 0.2 to approx 0.5 l /1000 km. Engineering shop was one that
services the l
If you don't have increased oil consuption, it's definitely the
valves, but if the valve guides were not installed and sized
correctly, you now have worn over-size guides, and the valve seats,
especially on the exhaust valves, are shot, causing low compression.
The only way to tell is to do
PROTECTED]>
To: "Mercedes Discussion List"
Sent: Friday, May 09, 2008 11:46 PM
Subject: Re: [MBZ] W123 300D losing compression??
> It's all goobered up. You gotta go drive it flat out for like 2000
> miles up hill, a Gumball Rally kind of thing.
>
> --R
>
> Pete
It's all goobered up. You gotta go drive it flat out for like 2000
miles up hill, a Gumball Rally kind of thing.
--R
Peter Merle wrote:
> My W123 300D seems to be slowly deteriorating. Oil consumption has increased
> , compression is down to min 16 bar. I had overhauled this engine myself
> abo
