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  #1  
Old 04-15-2008, 09:36 AM
Chad300tdt's Avatar
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Location: North Wales, PA
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Upgrading w123 with 1st generation w126 brakes

I just upgraded my wagon with first generation w126 rotors and calipers. I used a 1985 300SD to search for parts.

The only difference between w123 and 1st gen. w126 brakes is the front rotors are vented and thicker on the w126 and I think the caliper has a shorter piston. The rear calipers and rotors are exactly the same.

This upgrade is only for the benefit of the vented rotors and no different than a caliper and rotor R&R. I replaced the hoses and my front wheel bearings at the same time. There is no additional stopping power ... just more time to use it.

I used this write-up to help me. Thanks rhodes2010, it was helpful:
How To Replace Front Rotor W123


Before:


After:


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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

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1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
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  #2  
Old 04-15-2008, 10:17 AM
DeliveryValve's Avatar
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Quote:
Originally Posted by Chad300tdt View Post
......

After:

....
Beautiful job! Keep us informed on the long term results.
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  #3  
Old 04-15-2008, 10:35 AM
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Thanks

I'll let everyone know how it holds up. I plan to tow a trailer which is what prompted the upgrade to vented rotors.
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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #4  
Old 04-15-2008, 10:39 AM
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Quote:
Originally Posted by Chad300tdt View Post
Thanks

I'll let everyone know how it holds up. I plan to tow a trailer which is what prompted the upgrade to vented rotors.
To lancaster?

The new set-up does look pretty - nice job. I won't be posting my before and after shots of the 240d - ol' arlene is camera shy.
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  #5  
Old 04-15-2008, 10:43 AM
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Quote:
Originally Posted by Jordan G View Post
To lancaster?
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2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #6  
Old 04-15-2008, 10:43 AM
t walgamuth's Avatar
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That is a good idea. I had trouble with the heavier 300td wanting to warp rotors so a vented rotor is good with the extra weight, IMHO.

Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. It still needs upholstery redone...I also have a 427 Cobra replica with an aluminum chassis.
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  #7  
Old 04-15-2008, 10:45 AM
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Chad, you should paint your calipers red or something bright while you're at it. That would look pretty cool.
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  #8  
Old 04-15-2008, 10:51 AM
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Quote:
Originally Posted by t walgamuth View Post
That is a good idea. I had trouble with the heavier 300td wanting to warp rotors so a vented rotor is good with the extra weight, IMHO.

Tom W
Your previous posts on this topic helped me decide to do this upgrade.


Dee8go,

I was considering painting the calipers, but they look so pretty the way they are. They will most likely be all black with brake dust in a week anyway.
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2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #9  
Old 04-15-2008, 11:00 AM
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I saw new brake lines there too. Looks nice.
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  #10  
Old 04-15-2008, 11:09 AM
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Quote:
Originally Posted by lietuviai View Post
I saw new brake lines there too. Looks nice.
Thanks. The fittings that were attached to the wheel well were tough even with two wrenches. I ended up breaking a piece off the plastic sensor cable clip. It still works fine, and it was the worst thing that happened through the whole job.

I am glad I decided to get two 3/8" drifts for the old race removal. Each hub destroyed all the clean edges on one drift. I imagine one 1/2" drift might give enough edge for all four races if you plan carefully.
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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #11  
Old 04-15-2008, 11:13 AM
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I've rounded the fitting that attaches to the hose on one my of cars once. Not fun.
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  #12  
Old 04-15-2008, 11:29 AM
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Why not SS brake hoses?
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  #13  
Old 04-15-2008, 11:35 AM
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Quote:
Originally Posted by Jeremy5848 View Post
Why not SS brake hoses?
I was trying to keep my costs to a minimum. The brakes aren't the only thing I've needed to work on.

Do these rubber lines get much expansion? I guess if I was going to a 4 pot caliper it would be necessary.
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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
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  #14  
Old 04-15-2008, 11:36 AM
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[QUOTE=Chad300tdt;1825029]Your previous posts on this topic helped me decide to do this upgrade.

Glad to help.

Looks like a first class job.

Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. It still needs upholstery redone...I also have a 427 Cobra replica with an aluminum chassis.
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  #15  
Old 04-15-2008, 11:39 AM
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Quote:
Originally Posted by lietuviai View Post
I've rounded the fitting that attaches to the hose on one my of cars once. Not fun.
Happened to me too on a rear brake line of our '83SD....ended up replacing that section of the hard line....not all that big of a deal, but still a pain.
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