126 500 & 560 - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 08-03-2016, 03:07 PM Thread Starter
BenzWorld Junior Member
 
Date registered: Aug 2016
Vehicle: 1989 420 SEL
Location: Moore Haven Florida
Posts: 7
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Garage
Send a message via Skype™ to FloridaSESELSEC
(Thread Starter)
126 500 & 560

Some years ago a MB part trained tech (he said trained up to 126s) told me that the 126 500 engine block was cast iron & the 560 block was aluminum. He was certainly knowledgeable on the 500 as he stripped and rebuilt the engine but I am now interested in purchasing a SEC in the US and the 560 is in far greater numbers, please help
George
FloridaSESELSEC is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 08-03-2016, 03:22 PM
BenzWorld Veteran
 
Date registered: May 2014
Vehicle: 1988 300e 75 300d 74 450sl
Location: norcal
Posts: 764
Mentioned: 2 Post(s)
Quoted: 191 Post(s)
Quote:
Originally Posted by FloridaSESELSEC View Post
Some years ago a MB part trained tech (he said trained up to 126s) told me that the 126 500 engine block was cast iron & the 560 block was aluminum. He was certainly knowledgeable on the 500 as he stripped and rebuilt the engine but I am now interested in purchasing a SEC in the US and the 560 is in far greater numbers, please help
George
Maybe that part trained is where the confusion is. the 500 was only in the 126 for two years in the us 1984 and 1985 and both were aluminum the 560 was in 1986 to 1991 and it was also aluminum
in 1981 us production had the first aluminum v8 380 and it was made until 1985
so with five years of the 560 4 years of the 380 and two years of the 500 there will be more 560's to choose from
rollin560 is offline  
post #3 of 9 (permalink) Old 08-03-2016, 03:34 PM Thread Starter
BenzWorld Junior Member
 
Date registered: Aug 2016
Vehicle: 1989 420 SEL
Location: Moore Haven Florida
Posts: 7
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Garage
Send a message via Skype™ to FloridaSESELSEC
(Thread Starter)
Sorry Let me try again My SEL 500 was in the UK, that's where the conversation took place and the 500 was (as far as I know) the normal or popular engine and the 560 a rarity. I grew to trust my 500 and had few problems. The tech basically warned against the aluminum 560.
I am shortly to purchase a SEC in USA and felt if the 560 was a problem after all its much hotter Florida than UK would it be better to have a 500 or even 420 if they were cast blocks
George
FloridaSESELSEC is offline  
 
post #4 of 9 (permalink) Old 08-03-2016, 05:49 PM
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 19,554
Mentioned: 34 Post(s)
Quoted: 1796 Post(s)
Lifetime Premium Member
Garage
I am pretty confident the 4.5 was the last iron block m117 engine (and the first m117). The only confusion I could possibly see with respect to this is the fact that the next m117 engine to be produced was the 5.0 liter in the 450slc 5.0, a car of which only about 1600 were produced. In that version of the 5.0 m117, there is/was a detachable aluminum flange/adapter plate where the transmission connects, just like the iron block engines. On the cars labeled 1980 model year and later, the 500slc (and the 500sl, and probably any 500 w126 cars) the adapter plate was integrated to the block, not a separate piece of metal like the early alloy 5.0 engines.

I don't know how or why an experienced MB mechanic would say that any v8 engine after 1980 was an iron block.

Maybe a straight 6?

Maybe some other confusion?

.

My signature:
Click for list of my 34 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
post #5 of 9 (permalink) Old 08-03-2016, 05:54 PM
Lifetime Premium Member
 
Date registered: Jun 2009
Vehicle: 92 MB 400E, 99 BMW R1100RT, 00 BMW 323i Touring, 05 MB C230, 07 Chevy Tahoe LTZ, 07 Silverado Z71
Location: DFW
Posts: 4,825
Mentioned: 0 Post(s)
Quoted: 813 Post(s)
Lifetime Premium Member
No 420SECs or Gen 2 500SECs in the US. Except for a handful of private imports.

Also, pretty sure you are overthinking the whole thing. Just get what ever you find is best taken care of, condition matches the price, has best service records and fits your budget.

1992 MB 400E
1999 BMW R1100RT
2000 BMW 323i Touring
2005 MB C230K Sport
2007 Chevy Tahoe LTZ
2007 Chevy Silverado CC Z71
TexFinn is online now  
post #6 of 9 (permalink) Old 08-03-2016, 05:58 PM Thread Starter
BenzWorld Junior Member
 
Date registered: Aug 2016
Vehicle: 1989 420 SEL
Location: Moore Haven Florida
Posts: 7
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Garage
Send a message via Skype™ to FloridaSESELSEC
(Thread Starter)
Ok so both 500 & 560 are aluminum block engines in 126 models from the 1980s is that the case. I assume the 420 will also be Aluminum. Thanks
George
FloridaSESELSEC is offline  
post #7 of 9 (permalink) Old 08-04-2016, 05:18 AM
BenzWorld Veteran
 
Date registered: Aug 2009
Vehicle: '72 250C, '74 280C, '85 500SEL, '81 300CD.
Location: Tucson, Az.
Posts: 715
Mentioned: 3 Post(s)
Quoted: 71 Post(s)
The 420's had the M116's not M117's engines.


http://www.w116.org/library/autocar7202/

This might be where the confusion between alloy and iron blocks was created.

Last edited by Mike D; 08-04-2016 at 05:25 AM.
Mike D is offline  
post #8 of 9 (permalink) Old 08-04-2016, 05:21 AM
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 19,554
Mentioned: 34 Post(s)
Quoted: 1796 Post(s)
Lifetime Premium Member
Garage
Quote:
Originally Posted by Mike D View Post
The 420's had the M116's not M117's engines.


But similar to the m117 engines (4.5, 5.0, 5.6), all m116 beyond the initial iron block 3.5 are alloy: 3.8, 4.2, 3.8.


I'm pretty confident that all v8 from 1989 on are alloy block.

.

My signature:
Click for list of my 34 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
post #9 of 9 (permalink) Old 08-04-2016, 08:53 AM
BenzWorld Elite
 
flyboyike's Avatar
 
Date registered: May 2003
Vehicle: 2012 Focus SE
Location: Ormond Beach, FL
Posts: 7,704
Mentioned: 1 Post(s)
Quoted: 69 Post(s)
Quote:
Originally Posted by Fonzi View Post

I don't know how or why an experienced MB mechanic would say that any v8 engine after 1980 was an iron block.
This was in the UK, so he was probably just drunk.

Felicita e un bicchiere di vino con un panino.
flyboyike is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome