|
|
|
#1
|
||||
|
||||
W126 300SD Rear Lower Shock Mount Broke!
Hey everyone,
Around Christmas time my dad informed me of a rattle in the back end of his 300SD. I chased it down to a sheared off shock bolt. The innermost bolt had sheared off and the shock was only being held on by the one bolt. I finally got around to taking a more indepth look. I took out the good bolt and went to the hardware store to get replacements. Came back and found that the "good" bolts mount had broken free of the lower control arm. So now I am looking for options and explanations: 1) I could weld the mount back into the lower control arm and use it. 2) I could replace the lower control arm and go from there. Explanations: Why would this happen ? I think maybe the rear springs are weak/bad? Force transferred to the shock and sheared the one bolt leaving the "good" one to take the load...and then the control arm metal failed...or something along those lines.. So what do you guys think?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#2
|
||||
|
||||
I am sure someone wants to see pictures.
Could be there is some bad design concerning the where the Shocks Mount or rust? What does a new R Control Arm cost and how much would it change your alignment?
__________________
84 300D, 82 Volvo 244Gl Diesel |
#3
|
||||
|
||||
Quote:
A NEW control arm.. $2,053 via XXXX IF they are even available. I was able to get a used control arm for my other 300SD locally for $50, i sunk $200 into it via new bushings/bearings and here's the result: http://www.peachparts.com/shopforum/diesel-discussion/303427-w126-trailing-arm-rear-lower-control-arm-rebuilt-replacement.html
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#4
|
||||
|
||||
It looks like there was some rust present as well. I surmise that the rust was not AS big as an influence as the sheared bolt on the other side. I couldn't get a good picture of that but the head was completely sheared off forcing all loading to the other side..
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#5
|
|||
|
|||
Weld on a new bolt. I had a shock bolt and a Panhard rod bolt break off on my Wanderlodge (prior to my purchase). I assume it was a big pothole or something. Is there a bump stop missing which allowed inordinate pressure on the shock bolt when hitting a big hole?
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#6
|
||||
|
||||
Quote:
Where would I weld a new bolt in to? Just put metal over the missing section and a bolt on it?
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#7
|
|||
|
|||
That's what I would do. Much less work than replacing the whole lower control arm and the rest of the arm looks to be fine.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#8
|
||||
|
||||
Quote:
Here is what I've got... MIG Welder | MIG Welders | MIG Welding I used it during the restoration of this car and installed a 1/4" thick piece in place of a jack point... http://www.peachparts.com/shopforum/2618488-post27.html Most of the welds on the restoration were either low duty cycle load bearing or non-load bearing...
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#9
|
|||
|
|||
Probably but I'm not an expert on welders.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#10
|
||||
|
||||
rear trailing arms
Just so you know, I have shipped those before.... Let me know if you decide to replace because there's a w126 in the boneyard right now.
__________________
daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior Cluster Needles Paint New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more |
#11
|
||||
|
||||
How bad was shipping? What did they yard want for the part? I don't mind paying so long as it's reasonable.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#12
|
||||
|
||||
It's a pretty big box.....but by removing the brake hub and all, I think it's the size and not the weight.
The yard cost is the cheap part.... PM sent
__________________
daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior Cluster Needles Paint New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more |
#13
|
||||
|
||||
My main concern for welding new metal in there is strength...
1) Can my welder weld at suitably high enough amps/volts to ensure that the metal can endure the forces/duty cycles? 2) Whats the condition of the other bolt's metal surrounding area? It might be weak? Fine? Ideally what I would like to do is replace: -the arm with a rust-free arm with new bearing and rubber bits. -A new swaw bar link -new springs and spring pads.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#14
|
||||
|
||||
Quote:
I actually bought one for each side as both had rusted through spots. the one I replaced cracked nearly in 2 when I ran over a 3 inch high curb on a traffic island doing 45mph. The Metal the R Contol Arms is made of is very thin and even less so if it is rusted. That does not bode well for welding. I think if you are going to attempt a repair you need to make 2 circular Plates (sort of 2 large thick Washers) that fit into the Hole the Shock Absorber goes into and put one Plate on each side of the Control Arm. That will spread out the stress all over what is left of that sort of flange. To keep the plates from moving around either JB Weld them to the Arm or Tack Weld them on their inside diameter. I think any welding around the out side would only weaken the Metal. Instead of attempting to drill and tape for the Bolts simply drill the hole all the way through and use a Nut on the other end of the Bolt.
__________________
84 300D, 82 Volvo 244Gl Diesel |
#15
|
|||
|
|||
107 114 115 123 use the same arm.
|
Bookmarks |
Thread Tools | |
Display Modes | |
|
|