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Called few shops around but they all want the car back at their garage. Tried to explain to them with 4 lug bolts broken in the lug holes, I can't mount the wheel so can't get it towed either but no success.
Decided I am going to ***** them out myself so over the weekend went appropriate parts shopping.
The car needs to be moved from the non Lift garage spot to the Lift spot so had to buy the dollies, always wanted them so happy to have them
From the factory the dolly wheels bearings aren't lubricated so they make noise and not as freely movable, so started by greasing them.
Next Steps:
Move the car to the Lift Bay
Remove the Caliper and the rotor to see the extent of the broken studs
Ordering Left Hand Drill Bits and the EZ out's
I believe the W210 E55 uses 12mm lug bolts while the W211 E55/63 use 14mm lug bolts. If so, the W212 E63 wheels are drilled for 14mm lug bolts while you are using 12mm lug bolts. That slack would cause a bending moment that will break the bolts where the threads are aligned with the hub.
Your car is very modified so double check the parts on your car.
EDIT: if so, modify the hubs for 14mm bolts or install wheels designed for 12mm bolts.
EDIT 2: looking at the photo, the rotors look drilled for 14mm bolts; there seems to be larger diameter around the bolts. If you want to keep the later wheels, I would modify the hubs for 14mm bolts torqued to 100 ft-lbs. Please note I have not verified if the W210 hubs are thinner than the W211 hubs. If thinner, the hubs may not withstand the increased torque without stripping the threads. Another reason I rarely and now only mildly modify my cars. Been there, done that, got multiple T-shirts...
Last edited by bbirdwell; Oct 16, 2023 at 10:05 PM.
Not sure how to tell if they were over torqued though?
At this point looks like they were just crappy bolts and didn't hold up to the job
Does that look like a stock E55 rear hub or upgraded to accommodate the bigger brakes ?
I think it comes down to ball seat radius size primarily, length, and bolt quality
Stock OEM is M12 X 1.5 X 38 ( also seen 40mm) R12 ball seat. For W212 it's R14 M14 X1.5 X 26 I believe
The length of a stock W210 bolt extended beyond the back of the OEM mono block wheel is 17mm poking out for 38mm shank. An OEM bolt on the w212 wheel should stick out the same ~17mm with a 26 shank length.
W212 rear 10 spoke OEM is ET 52? (Correct me if Im wrong) minus 10 mm spacer is ET 42. Stock is ET 35 so the bolt length should be 26mm shank plus 7mm so length so ~ 33MM
M12 x 1.5 x 33 R14 Ball Seat bolt is needed if the math checks out
I had the same problem you did and snapped 4 bolts -2 bolts 2 times same side, Then replaced with same brand with new and they snapped again. I thought at first it was a bolt quality issue and never had a problem until I added more power via tune . Thought they were over torqued too.. It wasn't until I researched the info above and discovered I needed R14. I had the right size not the right radius.
Currently I run W212 E63 Split spoke replicas with M12 x 1.5 x 28mm R14 (aftermarket black bolts) rear ET35. Snaps have gone away and there is a more solid feeling by way of the wheels being more securely clamped on the hub with the new bolts. Time will tell!
Referring to ^^^^, all true and as a matter of fact I did buy hybrid and longer bolts R14- 1.5 but at the time didn't realize the bolts were different. I was planning on switching them but had not done it yet.
The bolts do pass the hub so were definitely long enough and the spacers are from ECS 10 mm and are hub-centric
I think i might have found out the problem too.
One of the lug bolts were missing so if they were over torqued, why a missing lug bolt?
It is quite possible some one was trying to steal the wheels and when he saw son walking out, left the job half done.
So driving the car with 4 lose bolts with one missing one, caused all the problem
Anyway, I was able to remove the broken lug bolts and would soon start shopping for the new wheels, don't like spacers, never did.
New wheel specs would be :
Front 19x9 28 mm
Rear 19x 9.5 38 mm
Going with the above specs, I should be able to use the wheels for both W210 E 55 and W212 E63S wagon...
When I had my 210 on original monoblocks with original bolts, I walked out of the house and noticed that 2 bolts had snapped off front the right rear wheel one day. I don't remember if this happened on one or two occasions since it was so long ago, but I ended up replacing all 5 bolts on that wheel and that was the end of it. They were the old bolts that snapped and not the replacement ones. I couldn't find a reason it happened and it was only that wheel. I always torqued my bolts to 85 ft lbs with a torque wrench.
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