The online factory manual (42-140) states that the self-locking hex bolts M 12 x 30 may be used only once. What is the reasoning for this? Could I just use loctite and reuse the bolts?

__________________
1985 MBZ 300DT
1969 MBZ 220d
1984 MBZ 300TDT
1981 VW Vanagon

The self locking feature is destroyed once the hex bolt is installed and removed.

You could certainly use Loctite and accomplish the same thing.

I've reinstalled them without Loctite. My personal opinion is that the self-locking feature is overkill. Ever see a bolt back off after it has been torqued to 80 ft.-lbs.? I haven't.

Whatever you do, don't cover the threads with Loctite. Just a drop or two. You'll realize your mistake when you need to remove the calipers the next time.

Same here, I just use a tiny dap of blue loctite on the end of the bolts and then put them in, never had one come loose yet!

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

i use the red loctite.

tom w

__________________
[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.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I have done it both ways (had new bolts come with a bearing kit once). After combined 25K miles on both cars, no problem with the Loctite option.

Jim

I never thought twice about using blue loctite.

Danny

__________________
1984 300SD Turbo Diesel 150,000 miles

OBK member #23

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination