gmore

Just got my 1st new headbolt installed and the bolt head cracked/frayed? Don't think I can emphasize enough how careful/**** I was on this (drain block; clean/dry threaded block hole/head contact; 50Nm+90x3). Best guess, missed something that's still lubricating the thread cavity and over-torqued? Can't see any fragments below but that'll be another project for another day - this project on pause again. Forwarded info/pics to my supplier for any info from MB and will report if/when I hear anything - if anyone has experienced this, please lmk.

new headbolt frayed

gmore

OK, I'm a moron.
Was gonna call it a day but decided I better clean it up and pull it off - broke out the scope to see what I was dealing with and took pictures before and after vacuuming (pics below). I'm going to consider myself lucky and quit now (that I think I'm ahead), but it appears the oem sealant on the bolt created the illusion of a crack...at least I hope. Needs a bit more than vacuuming and will clean it up and inspect more, but I think I'm (the car) is ok.

East Coast Euro

Based on the pics it looks fine

Jasonoff

Pick borrowed from --> https://mbworld.org/forums/c63-amg-w...d-install.html

Yeah, that white sealant (bolt on the right below) can creep up a bit when it creates a seal.

gmore

yeah I believe all is good - just got the second one in without the drama and has quite a bit less sealant.

This was my 1st tty as well as oem-sealant bolt install and am doing this in part to learn and challenge myself - mission accomplished

hachiroku

i thought it was sealant, but didn't want to scream foul.

glad to know with better pics you've identified it was sealant. cheers!

m a x i m u s

I'm impressed that you even have that kind of camera equipment.

gmore

I think it was on sale for $10 at Amazon - plugs into Android phone and does work pretty well.
I believe this is the same thing (different brand)...
https://smile.amazon.com/Depstech-Se...Endoscope+2+MP

roadtalontsi

nice to see my pictures getting used still. Thats probably the best thread i've ever internet'd.