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  #1  
Old 07-23-2010, 08:06 AM
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W123 Caster / castor settings for a sedan / saloon?

Dear All,

Now I'm getting worried:-

I've been using the caster specifications for a W126 as the W123 FSM CD I've got hasn't got the right chapters - I read here on Peach Parts that that was the solution...

However, it now looks to me like I'm adjusting things too far as the wheel base length is getting longer as I try to obtain a caster of 9 degrees. I'm using the method of turning the wheel by 20 degrees. The straight ahead measurement (that I can't make - no special tool) is 10 degrees.

I now see that values are quoted as 8 degrees straight ahead for a W123 on this link

http://www.benzworld.org/forums/discount-tire-direct-tire-wheel-brake/1182622-alignment-specs-w123-tires.html

So now I'm confused.

Question:-

Does anyone know what the caster setting (measured by turning the steering) for a W123?

I hope someone can help.

(Oh and if you know the answer to this - that would be great too!

W123 tech specs req'd - wheelbase length )

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #2  
Old 07-23-2010, 04:19 PM
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Answer

Chassis: wheel alignment spec
Chassis: wheel alignment spec
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  #3  
Old 07-24-2010, 01:50 PM
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Thanks but...

Quote:
Originally Posted by whunter View Post
Chassis: wheel alignment spec
Chassis: wheel alignment spec
Thanks for the answer but I don't see which link states the difference between the two methods of measuring caster.

One method is to use the MB special tool that clamps to the suspension and can simultaneously measure camber and caster...

...The other - more practical method for the DIYer - is to measure the camber when the wheel is turned to 20 degrees left and 20 degrees to the right.

There are different values of caster for each method.
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #4  
Old 07-24-2010, 02:08 PM
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Answer

Quote:
Originally Posted by Army View Post
Thanks for the answer but I don't see which link states the difference between the two methods of measuring caster.

One method is to use the MB special tool that clamps to the suspension and can simultaneously measure camber and caster...

...The other - more practical method for the DIYer - is to measure the camber when the wheel is turned to 20 degrees left and 20 degrees to the right.

There are different values of caster for each method.
Wheel alignment DIY data = how to measure/make adjustments
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  #5  
Old 08-07-2010, 01:59 PM
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Join Date: Sep 2009
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I've now got the data I wanted!

I've now got the data I wanted...

I also got the data for a 126 and a 107.

I've put it all together into a pdf file which is attached. Disclaimer - I think this data is good - it is at your own risk if you decide to use it. If you can, check with a specialist or a dealer to make sure.
Attached Files
File Type: pdf MB front suspension data.pdf (22.1 KB, 1103 views)
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Last edited by Stretch; 08-07-2010 at 02:00 PM. Reason: Punctuation
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  #6  
Old 02-07-2011, 03:27 PM
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Quote:
Originally Posted by Army View Post
I've now got the data I wanted...

I also got the data for a 126 and a 107.

I've put it all together into a pdf file which is attached. Disclaimer - I think this data is good - it is at your own risk if you decide to use it. If you can, check with a specialist or a dealer to make sure.
Thanks Army, you're the coolest. Plus you live in the coolest country.
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  #7  
Old 11-08-2011, 11:36 AM
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thanks Army...taking my 82 to be aligned and I want to have this info in hand :-)
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  #8  
Old 11-10-2011, 08:32 PM
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Quote:
Originally Posted by Army View Post
I've now got the data I wanted...

I also got the data for a 126 and a 107.

I've put it all together into a pdf file which is attached. Disclaimer - I think this data is good - it is at your own risk if you decide to use it. If you can, check with a specialist or a dealer to make sure.
Thanks for that, BTW do you feel a difference in steering & drive quality with a change of alignment specs.
Ad
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  #9  
Old 11-13-2011, 08:16 AM
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Join Date: Sep 2009
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Quote:
Originally Posted by Adler View Post
Thanks for that, BTW do you feel a difference in steering & drive quality with a change of alignment specs.
Ad
I most certainly did - but then I had just built the front and rear suspension and put in Bilstein HDs...

...totally different car...

...almost felt like a sports car.



(Please note I did say almost!)


How different it would feel on old components I don't know. But I'd guess it would be sharper and more decisive - a bit better than the "point and hope" low mileage one owner always garaged W123s I tried before I bought my bag of nails!

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Last edited by Stretch; 11-13-2011 at 08:16 AM. Reason: Spelling
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