stripped allen bolt in 602 head - PeachParts Mercedes-Benz Forum

earl orchard · #1 07-01-2014, 01:20 PM

so like a big dumbass i stripped one of the two allen head bolts in my 602 any ideas on how to get the sucker out? ( one by the timing chain) what happens if i cant get it out?

cheers

kenny

loneranger · #2 07-01-2014, 01:42 PM

try using a regular 12 pt socket- 10 mm or maybe a standard size, put it on an extention and drive it on the outside of the allen bolt. It is an interference fit and should unscrew the bolt with a ratchet on the extension. I may be wrong on the socket size, try standard and metric sockets til you find one that will drive on.

vstech · #3 07-01-2014, 02:38 PM

one of the little ones? ouch...

I think they are recessed, so getting an external grip socket on there may be impossible, but give it a try... don't attempt to use the irwin brand from autoparts stores, get an actual snap-on or MAC version... they are harder, and slimmer...

take the one bolt you got out with you so you don't have to buy the entire set... $$

Diesel911 · #4 07-01-2014, 03:25 PM

Quote:

Originally Posted by earl orchard

so like a big dumbass i stripped one of the two allen head bolts in my 602 any ideas on how to get the sucker out? ( one by the timing chain) what happens if i cant get it out?

cheers

kenny

Was this removing them or installing them?

earl orchard · #5 07-01-2014, 03:36 PM

removing, i got the first one out,man was it in there. the second one stripped after one try, i tried an extractor socket,but there is not enough room for the socket to set all the way round the bolt so i will try a thinner one tonight as per lonerangers idea. i have a drill extractor set, but that a last resort

winmutt · #6 07-01-2014, 03:37 PM

Drill it? Assuming you are talking about the two at the front of the head.

Diesel911 · #7 07-01-2014, 03:40 PM

Quote:

Originally Posted by earl orchard

removing, i got the first one out,man was it in there. the second one stripped after one try, i tried an extractor socket,but there is not enough room for the socket to set all the way round the bolt so i will try a thinner one tonight as per lonerangers idea. i have a drill extractor set, but that a last resort

If you are removing the Cylinder Head the Bolt heads if done carefully can be drilled away or ground off. When the Head is pulled up off of what is left it will likely be loss or can be turned with a Vice Grips.

I have no knowlege of these other then the info from the Ad.
The Lisle Corp. 4-pc Stripped Screw Extractor Set, No. 62110, includes six lobed spiral bits which are designed to remove rounded or stripped fasteners with internal drive heads. Four sizes of extractors fit Torx and Torx Plus sizes T-40 to T-55; internal hex sizes 1/4” to 1/2” and 6mm to...

To see a Pic go to Post #14
OM617 oil filter housing leak

earl orchard · #8 07-01-2014, 03:46 PM

Quote:

Originally Posted by winmutt

Drill it? Assuming you are talking about the two at the front of the head.

yes, the two allen head bolts in the timing chain area, i got one out and the other stripped

i am somewhat freaked out by this

earl orchard · #9 07-01-2014, 03:53 PM

Quote:

Originally Posted by Diesel911

If you are removing the Cylinder Head the Bolt heads if done carefully can be drilled away or ground off. When the Head is pulled up off of what is left it will likely be loss or can be turned with a Vice Grips.
?

I have no knowlege of these other then the info from the Ad.
The Lisle Corp. 4-pc Stripped Screw Extractor Set, No. 62110, includes six lobed spiral bits which are designed to remove rounded or stripped fasteners with internal drive heads. Four sizes of extractors fit Torx and Torx Plus sizes T-40 to T-55; internal hex sizes 1/4” to 1/2” and 6mm to...
i have something very close to that To see a Pic go to Post #14
OM617 oil filter housing leak

so once the head of the bolt is gone the head will pull sraight up and off? so no threads to hold it there?

Sugar Bear · #10 07-01-2014, 04:41 PM

Epoxy the bit into the stripped bolt, let it dry thoroughly. Come back and try it. Be careful that the epoxy that breaks away when applying torque does not go into the oil pan. Stuff the chain cavity with rags first.

When trying to loosen it apply moderate torque and then a sudden jolt of high torque in a snap motion without releasing the moderate torque first.

earl orchard · #11 07-01-2014, 05:07 PM

Quote:

Originally Posted by Sugar Bear

Epoxy the bit into the stripped bolt, let it dry thoroughly. Come back and try it. Be careful that the epoxy that breaks away when applying torque does not go into the oil pan. Stuff the chain cavity with rags first.

When trying to loosen it apply moderate torque and then a sudden jolt of high torque in a snap motion without releasing the moderate torque first.

i tried that with gorilla glue did not work..so you think epoxy would be strong enough to hold and break the bolt free? any kind of epoxy will work?

moon161 · #12 07-01-2014, 05:13 PM

How bad is the socket really? Here's what worked for me when I rounded one a bit.

Penetrant- PB blaster is what I used.
Whack the head on the side w/ a brass drift and a BFH.
More penetrant.
Clean the socket out w/ q-tip and penetrant.
Seat good allen key (not a cheapo) in socket w/ extension and BFT. You'll feel it bottom out.

Also you can try left handed drill and then bolt extractor.

2 usually makes the biggest difference for me.

earl orchard · #13 07-01-2014, 06:54 PM

Quote:

Originally Posted by moon161

How bad is the socket really? Here's what worked for me when I rounded one a bit.

Penetrant- PB blaster is what I used.
Whack the head on the side w/ a brass drift and a BFH.
More penetrant.
Clean the socket out w/ q-tip and penetrant.
Seat good allen key (not a cheapo) in socket w/ extension and BFT. You'll feel it bottom out.

Also you can try left handed drill and then bolt extractor.

2 usually makes the biggest difference for me.

this thing is inside the timing chain area inside the head,most difficult to access to say the least, i have a bolt extractor set (kinda looks like a christmas tree) i have not used, do i use the extractor bit that is about the same/smaller than the bolt i want to back out? or do i use a larger bit ?

Sugar Bear · #14 07-01-2014, 07:14 PM

Did this with JB Weld on a starter bolt on an 85 300TD and it worked. It really helps if an assistant can strike the bolt with a long punch and hammer at the same time torque is applied.

earl orchard · #15 07-01-2014, 08:04 PM

Quote:

Originally Posted by loneranger

try using a regular 12 pt socket- 10 mm or maybe a standard size, put it on an extention and drive it on the outside of the allen bolt. It is an interference fit and should unscrew the bolt with a ratchet on the extension. I may be wrong on the socket size, try standard and metric sockets til you find one that will drive on.

hey Loneranger if you and Tonto are in town i will buy you guys a beer! 12mm 12point beat on with a hammer,turned with a 18" breaker bar did the trick, i had already tried it with an extractor bolt,but the extractor socket was to fat to get on the bolt properly.
have a great holiday weekend !

cheers
kenny