[W126 Coupe] 500SEC engine/starter question

[Josh Allen]

Well, I figured out what was happening.  On mine, the new starter was 
apparently binding up on the ring gear, which would keep the drive 
extended, and the contact in the solenoid engaged. 
Once I replaced the starter with the old but functional one that was on 
the car before I started rebuilding the engine, the problem went away.

The starter has since been returned to Schucks.

Now I just have to figure out what is wrong with the car, as it 
instantly floods when I start it!  More fun, but I finally got an engine 
repair manual for it.  MUCH better than the second hand manuals on CD.

-Josh


dustin famer wrote:

> I had that endless cranking problem one day. My 380 stalled out in 

> front of my driveway and when I tried to restart it it would crank but 

> not start. After several tries the endless cranking started, I pulled 

> the keys out and it kept cranking, for about 3 or more 

> mins.....finally  it stopped, I fried the starter. I didn't have sense 

> enough to pull the battery cable off. The mechanic replaced the 

> rebuilt starter recently so he replace this one for free, but 

> apparently the Ignition Control Module was bad.

>  

> Dustin

>  

>

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>     Today's Topics:

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>     1. Re: OFF-TOPIC Travel Help, weekend in Seattle with

>     girlfriend, what are MUST dos? (Edward Chin)

>     2. 500SEC engine/starter question (Josh Allen)

>     3. Re: 500SEC engine/starter question (Jonathan Hodgman)

>     4. Re: 500SEC engine/starter question (Josh Allen)

>     From: Edward Chin <gdrakon at gmail.com>

>     To: "'Mercedes Coupes Mailing Lists'" <mbcoupes at mbcoupes.com>

>     Date: Fri, 16 May 2008 14:57:24 -0700

>     Subject: Re: [W126 Coupe] OFF-TOPIC Travel Help,

>     weekend in Seattle with girlfriend, what are MUST dos?

>

>     Thanks guys!  Some great suggestions here!  Too bad about that

>     train though.

>      

>     Regards,

>      

>     Eddie

>      

>     ------------------------------------------------------------------------

>     *From:* mbcoupes-bounces at mbcoupes.com

>     [mailto:mbcoupes-bounces at mbcoupes.com] *On Behalf Of *Paul Samarin

>     *Sent:* Thursday, May 15, 2008 6:41 PM

>     *To:* Mercedes Coupes Mailing Lists

>     *Subject:* Re: [W126 Coupe] OFF-TOPIC Travel Help,weekend in

>     Seattle with girlfriend, what are MUST dos?

>      

>     Dang! Dinner train stopped running October, 2007!

>      

>     http://www.eastsiderailnow.org/spirit_of_washington.html

>      

>     Paul

>      

>     Paul Samarin

>     pauls at sbcglobal.net <mailto:pauls at sbcglobal.net>

>      

>

>

>      

>     From: Josh Allen <heyallen at null-ptr.net>

>     To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>

>     Date: Sat, 17 May 2008 00:24:34 -0700

>     Subject: [W126 Coupe] 500SEC engine/starter question

>

>     If anyone can lend any ideas here, it would be much appreciated.

>

>     After installing the "new" engine in my SEC, I finally went to

>     turn it

>     over a bit to pump some oil up into the engine, and ATF through the

>     tranny plumbing.

>

>     While renewing the engine before reinstalling it, I installed a

>     rebuilt

>     starter. The new starter differs slightly from the old starter in the

>     terminal arrangement, in that it has two smaller terminals slightly

>     separated from each other, rather than the two terminals that were

>     only

>     separated by a plastic divider on the old starter.

>

>     At first, the starter wouldn't respond, so I switched the terminal

>     on it

>     for the solenoid control wire, at which point it wouldn't stop once I

>     jumpered it at the terminal block.

>

>     Once I had interrupted the endless cranking by removing the battery

>     terminal, I am now scratching my head trying to figure out what went

>     wrong. I can't seem to find a good wiring diagram to reference as to

>     which terminal on the terminal row should have power, switched

>     power, or

>     start only power. Currently, all the terminals appear to be connected

>     to B+, even when the ignition is off.

>

>     I decided that it was time to take a break and think on this some

>     more,

>     while not staring at it.

>

>     Any ideas on what I managed to mess up in hooking it up?

>

>

>     From: "Jonathan Hodgman" <jhodgman at gmail.com>

>     To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>

>     Date: Sat, 17 May 2008 10:09:33 -0400

>     Subject: Re: [W126 Coupe] 500SEC engine/starter question

>

>     Is your neutral safety switch OK/set up properly?

>

>     Jonathan

>

>     On Sat, May 17, 2008 at 3:24 AM, Josh Allen <heyallen at null-ptr.net

>     <mailto:heyallen at null-ptr.net>> wrote:

>

>         If anyone can lend any ideas here, it would be much appreciated.

>

>         After installing the "new" engine in my SEC, I finally went to

>         turn it over a bit to pump some oil up into the engine, and

>         ATF through the tranny plumbing.

>

>         While renewing the engine before reinstalling it, I installed

>         a rebuilt starter.  The new starter differs slightly from the

>         old starter in the terminal arrangement, in that it has two

>         smaller terminals slightly separated from each other, rather

>         than the two terminals that were only separated by a plastic

>         divider on the old starter.

>

>         At first, the starter wouldn't respond, so I switched the

>         terminal on it for the solenoid control wire, at which point

>         it wouldn't stop once I jumpered it at the terminal block.

>

>         Once I had interrupted the endless cranking by removing the

>         battery terminal, I am now scratching my head trying to figure

>         out what went wrong.  I can't seem to find a good wiring

>         diagram to reference as to which terminal on the terminal row

>         should have power, switched power, or start only power.

>          Currently, all the terminals appear to be connected to B+,

>         even when the ignition is off.

>

>         I decided that it was time to take a break and think on this

>         some more, while not staring at it.

>

>         Any ideas on what I managed to mess up in hooking it up?

>

>         The MB Coupes Website!

>         W126 SEC Mailing List

>         Postings remain property of MB Coupes, L.L.C.

>

>

>

>

>     -- 

>     Blue Ridge Mercedes/AMG East

>     Offering Enthusiast Service, Restoration and Modification.

>     Providing quality parts to discriminating customers in all parts

>     of the world.

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>     http://www.blueridgemb.com <http://www.blueridgemb.com/>

>     404 805 1357

>

>     1996 S600 Euro "Scharnhorst"

>     1991 560 SEC Full Euro ECE

>     1991 560 SEC 226Hp/271ft/lbs:)

>     1989 560 SEC AMG (N.Amer 250/295)

>     1986 560 SEL AMG 6.0L 32V

>     1980 280 SE Euro

>     1978 300D TMU

>     1987 560 SEL 162K Midnight Blue on Gray RIP:(

>     2006 Z4 3.0Si M spec 6sp From: Josh Allen <heyallen at null-ptr.net>

>     To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>

>     Date: Sat, 17 May 2008 08:08:44 -0700

>     Subject: Re: [W126 Coupe] 500SEC engine/starter question

>

>     Well, I never altered the neutral safety switch, so I hope it's still

>     set properly... I'll have to go check, but I never changed anything

>     down there, other than disconnecting and reconnecting when R&Ring the

>     engine/tranny.

>

>     Now that I've had some time to think, I'm leaning toward thinking

>     that

>     I've somehow gotten battery power applied to the starter control

>     wire in

>     the main vehicle harness, not the section that jumps from the

>     fender to

>     the starter. When I unscrewed the rear terminal and pulled the

>     starter

>     solenoid wire out of the set, there was still continuity to B+

>     present

>     on the other violet/white wires that it shares that terminal with.

>

>     -Josh

>

>     Jonathan Hodgman wrote:

>     > Is your neutral safety switch OK/set up properly?

>     >

>     > Jonathan

>     >

>     > On Sat, May 17, 2008 at 3:24 AM, Josh Allen

>     > > wrote:

>     >

>     > If anyone can lend any ideas here, it would be much appreciated.

>     >

>     > After installing the "new" engine in my SEC, I finally went to

>     > turn it over a bit to pump some oil up into the engine, and ATF

>     > through the tranny plumbing.

>     >

>     > While renewing the engine before reinstalling it, I installed a

>     > rebuilt starter. The new starter differs slightly from the old

>     > starter in the terminal arrangement, in that it has two smaller

>     > terminals slightly separated from each other, rather than the two

>     > terminals that were only separated by a plastic divider on the old

>     > starter.

>     >

>     > At first, the starter wouldn't respond, so I switched the terminal

>     > on it for the solenoid control wire, at which point it wouldn't

>     > stop once I jumpered it at the terminal block.

>     >

>     > Once I had interrupted the endless cranking by removing the

>     > battery terminal, I am now scratching my head trying to figure out

>     > what went wrong. I can't seem to find a good wiring diagram to

>     > reference as to which terminal on the terminal row should have

>     > power, switched power, or start only power. Currently, all the

>     > terminals appear to be connected to B+, even when the ignition

>     is off.

>     >

>     > I decided that it was time to take a break and think on this some

>     > more, while not staring at it.

>     >

>     > Any ideas on what I managed to mess up in hooking it up?

>     >

>     > The MB Coupes Website!

>     > W126 SEC Mailing List

>     > Postings remain property of MB Coupes, L.L.C.

>     >

>     >

>     >

>     >

>     > --

>

>

>     The MB Coupes Website!

>     W126 SEC Coupes

>     Postings remain property of MB Coupes, L.L.C.

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