om617 Head removal question - PeachParts Mercedes-Benz Forum

redline808 · #1 05-11-2011, 02:19 AM

What holds the rocker assemblies in place. I cannot get to the head bolts with out removing them. My head bolt socket is not long enough to reach down to the head bolts because the notch in the rocker towers is to small. There is a hole in the center of each, I assume there is a bolt holding it to the head. I cannot see into the hole. Does anyone know what kind of bolt, hex, star, other? and size tool I will need.

thanks.

Stretch · #2 05-11-2011, 10:59 AM

Quote:

Originally Posted by redline808

What holds the rocker assemblies in place. I cannot get to the head bolts with out removing them. My head bolt socket is not long enough to reach down to the head bolts because the notch in the rocker towers is to small. There is a hole in the center of each, I assume there is a bolt holding it to the head. I cannot see into the hole. Does anyone know what kind of bolt, hex, star, other? and size tool I will need.

thanks.

The rocker arms are meant to be held in place with Allen head bolts. For pictures see this thread:-

OM617 rocker arm problem?

(Please note the group of 2 rocker arms are on the front part of the engine - and the group of 3 are on the back - over cylinders 3,4 and 5 => If you have time to read through the thread you'll find out why that can cause problems!)

The head bolts can be of 2 types - hex head (in which case their tightness needs to be checked after a specified time in the FSM - I forget what it is - I'll look it up if you need it) - or a 12 point star type. According to vstech (reliable source) they are tripple square keys

Daft W123 300D nut and bolts sizes

From this thread:-

Daft W123 300D nut and bolts sizes

The rocker arm bolts do not go lower than the head gasket. The camshaft tower bolts do.

redline808 · #3 05-11-2011, 05:56 PM

I actually just need to take off the head. I am only trying to lighten up my mock up block. I am going to prop it up on the damper side so I can center my transmission on to the back side and make my bell housing adapter.

Thanks for the awesome reply!

whunter · #4 05-11-2011, 06:49 PM

Triple Square
Triple Square Tool

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redline808 · #5 05-12-2011, 03:01 AM

LOL, apparently someone previous had taken out the long hex bolts which hold the rocker onto the head, just leaving the hole. so, here i am trying to stick long hex wrenches down the empty holes wondering where the top of the bolt is. i was over it, so i took a piece of wood and a hammer, they popped right off. all that was holding them was the dowels. to funny.

Stretch · #6 05-12-2011, 03:36 AM

Quote:

Originally Posted by redline808

LOL, apparently someone previous had taken out the long hex bolts which hold the rocker onto the head, just leaving the hole. so, here i am trying to stick long hex wrenches down the empty holes wondering where the top of the bolt is. i was over it, so i took a piece of wood and a hammer, they popped right off. all that was holding them was the dowels. to funny.

Kind of funny - but what else is missing?

Oh and take a look at the pictures posted in the first thread in my first reply of the bolts you need to put the rocker towers back in place.

They are waisted bolts - and not very cheap if you ask the dealer!

redline808 · #7 05-12-2011, 03:56 AM

Im actually not putting it back together. it was a bad engine that was given to me. I am using it to mock up my adapter plate so i can bolt my om617 to a toyota r150f and install it into my T100. i only wanted to take off the head to make it a little lighter.

Stretch · #8 05-12-2011, 04:04 AM

Quote:

Originally Posted by redline808

Im actually not putting it back together. it was a bad engine that was given to me. I am using it to mock up my adapter plate so i can bolt my om617 to a toyota r150f and install it into my T100. i only wanted to take off the head to make it a little lighter.

Oh great thank %$^&$*& for that!

SpecialDelivery · #9 11-16-2012, 02:07 PM

anyone know the max length at which the old 3x/sq head bolts can be reused?

Stretch · #10 11-16-2012, 03:35 PM

Quote:

Originally Posted by SpecialDelivery

anyone know the max length at which the old 3x/sq head bolts can be reused?

The FSM chapter 01-405 gives three lengths for "double hex head" bolts - information is on the 1st page of the PDF will that do?

whunter · #11 11-17-2012, 05:12 AM

Quote:

Originally Posted by SpecialDelivery

anyone know the max length at which the old 3x/sq head bolts can be reused?

Please check your e-mail..

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SpecialDelivery · #12 11-17-2012, 11:55 AM

Thanks Roy, I should have mod'd that post, I found them in the FSM. Now if I can figure out how to upload pdf's *like a boss*

Do you or anyone out there know what this sensor is supposed to be wired into? I have looked into this a few times and cant seem to find it.

whunter · #13 11-17-2012, 12:25 PM

Quote:

Originally Posted by SpecialDelivery

Thanks Roy, I should have mod'd that post, I found them in the FSM. Now if I can figure out how to upload pdf's *like a boss*

Do you or anyone out there know what this sensor is supposed to be wired into? I have looked into this a few times and cant seem to find it.

That is your block heater, all you need is a cord..

.

SpecialDelivery · #14 11-17-2012, 12:40 PM

schweeeet....what is that a 110?

whunter · #15 11-17-2012, 04:48 PM

Quote:

Originally Posted by SpecialDelivery

schweeeet....what is that a 110?

YES