[W126 Coupe] R129 500SL help
Sulaiman Abbasi
mbcoupes@mbcoupes.com
Sun, 2 Jan 2005 20:26:32 +0300
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Satish, Rich, Dorian and Chaz,
First of all many thanks for all the advice and assistance given to me =
and my mechanic. Once again this group has come through - Satish you =
were pretty close with pointing us to the plugs/wires/timing area. The =
R129 500SL saga comes to an end and my mechanic is grinning from ear to =
ear. He says you all are a great group.=20
So what was the problem? Well it was more than one problem. The cam =
timing was out by one tooth in addition that, one of the rotors was =
cracked. The crack in the rotor caused it to have excessive play on the =
spindle. So we had a case of both timing of valves and spark being out. =
I am pretty sure that the cracked rotor was also causing the spark to =
ground out rather than discharging with full strength across the plug =
points. Spark plug wire orientation was correct.=20
Best Regards
Sulaiman
'89 500SEC Euro
-----Original Message-----
From: Richard Davisson
To: <mbcoupes@mbcoupes.com>
Subject: Re: [W126 Coupe] R129 500SL help
Date: Fri Dec 31 2004 - 11:03:43 EST
Reply-To: mbcoupes@mbcoupes.com
A long shot but it happened to me with the described symptoms: plugged =
Cats.
- Rich D.
-----Original Message-----
From: "Satish Tummala" <satish@tummala.net>
To: <mbcoupes@mbcoupes.com>
Subject: Re: [W126 Coupe] R129 500SL help
Date: Fri, 31 Dec 2004 08:23:01 -0500
Reply-To: mbcoupes@mbcoupes.com
Well, it's probably incorrect plug wire positions on the distributor =
drive. I assume this is a pre-1996 119 engine with dual distributors =
and coils correct? I doubt compression is an issue. Cam timing is =
relatively easy to check after pulling the valve covers.
I'm betting that it's the position of the plug wires on the =
distributors. Check those carefully against a diagram. Note that some =
wires from the right bank route over to the left distributor and =
vice-versa. I'll bet this wasn't done.
----- Original Message -----
From: Sulaiman Abbasi
To: mbcoupes@mbcoupes.com
Sent: Friday, December 31, 2004 1:00 AM
Subject: [W126 Coupe] R129 500SL help
I Have posted the message on the R129 list but since I am not a member =
of the R129 list I fear that my post will not get through. Those few who =
have transplanted the an M119 engine to their W126 SECs might be able to =
offer an insight.
Anyway, the problem is that my mechanic is working on a R129 that needed =
a valve job. After he refitted the heads back, the car in question has =
no power at all. It starts and idles fine but has no power once on the =
go, if the accelerator is floored ---- no power. I will be visiting him =
next week to personally drive the car and see what could be the problem =
and to help him do a bit of trouble shooting.
A few things already in my mind are to go over the cam timing, correct =
plug wire fixing and a compression test. Any other points that come to =
mind would be welcome
Thanks in advance.
Sulaiman
'89 500SEC Euro =20
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2><FONT face=3DArial size=3D2>Satish, =
Rich, Dorian and=20
Chaz,</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>First of all many thanks for all the =
advice and=20
assistance given to me and my mechanic. Once again this group has come =
through -=20
Satish you were pretty close with pointing us to the =
plugs/wires/timing=20
area. The R129 500SL saga comes to an end and my mechanic is grinning =
from ear=20
to ear. He says you all are a great group. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>So what was the problem? =
Well it was more=20
than one problem. The cam timing was out by one tooth in =
addition=20
that, one of the rotors was cracked. The crack in the=20
rotor caused it to have excessive play on the spindle. So =
we had=20
a case of both timing of valves and spark being out. I am pretty =
sure that=20
the cracked rotor was also causing the spark to ground out rather =
than=20
discharging with full strength across the plug points. Spark=20
plug wire orientation was correct. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Best Regards</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Sulaiman</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>'89 500SEC Euro</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>-----Original=20
Message-----</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>From: Richard=20
Davisson</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>To: <<A=20
href=3D"mailto:mbcoupes@mbcoupes.com"><FONT face=3D"Times New Roman"=20
size=3D3>mbcoupes@mbcoupes.com</FONT></A><FONT face=3D"Times New Roman"=20
size=3D3>></FONT><BR>Subject: Re: [W126 Coupe] R129 500SL=20
help</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>Date: Fri Dec=20
31 2004 - 11:03:43 EST</FONT></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><FONT face=3D"Times New Roman" =
size=3D3>Reply-To: <A=20
href=3D"mailto:mbcoupes@mbcoupes.com"><FONT face=3D"Times New Roman"=20
size=3D3>mbcoupes@mbcoupes.com</FONT></A><BR><BR>A long shot but it =
happened to me=20
with the described symptoms: plugged Cats.<BR><BR>- Rich D.<BR></DIV>
<DIV>-----Original Message-----<BR>From: "Satish Tummala" <</FONT><A=20
href=3D"mailto:satish@tummala.net"><FONT face=3D"Times New Roman"=20
size=3D3>satish@tummala.net</FONT></A><FONT face=3D"Times New Roman"=20
size=3D3>><BR>To: <</FONT><A =
href=3D"mailto:mbcoupes@mbcoupes.com"><FONT=20
face=3D"Times New Roman" size=3D3>mbcoupes@mbcoupes.com</FONT></A><FONT=20
face=3D"Times New Roman" size=3D3>><BR>Subject: Re: [W126 Coupe] R129 =
500SL=20
help<BR>Date: Fri, 31 Dec 2004 08:23:01 -0500<BR>Reply-To: </FONT><A=20
href=3D"mailto:mbcoupes@mbcoupes.com"><FONT face=3D"Times New Roman"=20
size=3D3>mbcoupes@mbcoupes.com</FONT></A><BR><FONT face=3D"Times New =
Roman"=20
size=3D3><BR>Well, it's probably incorrect plug wire positions on the =
distributor=20
drive. I assume this is a pre-1996 119 engine with dual =
distributors and=20
coils correct? I doubt compression is an issue. Cam timing =
is=20
relatively easy to check after pulling the valve covers.<BR><BR>I'm =
betting that=20
it's the position of the plug wires on the distributors. Check =
those=20
carefully against a diagram. Note that some wires from the right =
bank=20
route over to the left distributor and vice-versa. I'll bet this =
wasn't=20
done.<BR><BR> ----- Original Message -----<BR> From: =
Sulaiman=20
Abbasi<BR> To: </FONT><A =
href=3D"mailto:mbcoupes@mbcoupes.com"><FONT=20
face=3D"Times New Roman" =
size=3D3>mbcoupes@mbcoupes.com</FONT></A><BR><FONT=20
face=3D"Times New Roman" size=3D3> Sent: Friday, December 31, 2004 =
1:00=20
AM<BR> Subject: [W126 Coupe] R129 500SL help<BR><BR><BR>I Have =
posted the=20
message on the R129 list but since I am not a member of the R129 list I =
fear=20
that my post will not get through. Those few who have transplanted the =
an M119=20
engine to their W126 SECs might be able to offer an =
insight.<BR><BR>Anyway, the=20
problem is that my mechanic is working on a R129 that needed a valve =
job. After=20
he refitted the heads back, the car in question has no power at all. It =
starts=20
and idles fine but has no power once on the go, if the accelerator is =
floored=20
---- no power. I will be visiting him next week to personally drive the =
car and=20
see what could be the problem and to help him do a bit of trouble=20
shooting.<BR><BR>A few things already in my mind are to go over the cam =
timing,=20
correct plug wire fixing and a compression test. Any other points that =
come to=20
mind would be welcome<BR><BR> Thanks in advance.<BR><BR> =20
Sulaiman<BR> '89 500SEC Euro =
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