Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-11-2011, 02:19 AM
Registered User
 
Join Date: Jul 2010
Posts: 49
om617 Head removal question

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.

Reply With Quote
  #2  
Old 05-11-2011, 10:59 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by redline808 View Post
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.
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #3  
Old 05-11-2011, 05:56 PM
Registered User
 
Join Date: Jul 2010
Posts: 49
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!
Reply With Quote
  #4  
Old 05-11-2011, 06:49 PM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,359
FYI

Triple Square
Triple Square Tool









.
__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1980 240D
1983 300D
1984 190D
Reply With Quote
  #5  
Old 05-12-2011, 03:01 AM
Registered User
 
Join Date: Jul 2010
Posts: 49
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.
Reply With Quote
  #6  
Old 05-12-2011, 03:36 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by redline808 View Post
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!
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #7  
Old 05-12-2011, 03:56 AM
Registered User
 
Join Date: Jul 2010
Posts: 49
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.
Reply With Quote
  #8  
Old 05-12-2011, 04:04 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by redline808 View Post
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!
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #9  
Old 11-16-2012, 02:07 PM
SpecialDelivery's Avatar
SWFL Benz Clubbin...
 
Join Date: Jun 2011
Location: Cape Coral, FL
Posts: 393
anyone know the max length at which the old 3x/sq head bolts can be reused?
__________________
-SpecialDelivery
1985 300CD Silver/Blue H&R Suspension (Sold, still cryin over that)
1982 300SD Silver/Blue '85 OM617 (Sold)
1982 300D - Blue/Blue (Sold)
Reply With Quote
  #10  
Old 11-16-2012, 03:35 PM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Quote:
Originally Posted by SpecialDelivery View Post
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?
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #11  
Old 11-17-2012, 05:12 AM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,359
You have e-mail

Quote:
Originally Posted by SpecialDelivery View Post
anyone know the max length at which the old 3x/sq head bolts can be reused?
Please check your e-mail..




.
__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1980 240D
1983 300D
1984 190D
Reply With Quote
  #12  
Old 11-17-2012, 11:55 AM
SpecialDelivery's Avatar
SWFL Benz Clubbin...
 
Join Date: Jun 2011
Location: Cape Coral, FL
Posts: 393
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.

Reply With Quote
  #13  
Old 11-17-2012, 12:25 PM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,359
Chuckle

Quote:
Originally Posted by SpecialDelivery View Post
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..



.
__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1980 240D
1983 300D
1984 190D
Reply With Quote
  #14  
Old 11-17-2012, 12:40 PM
SpecialDelivery's Avatar
SWFL Benz Clubbin...
 
Join Date: Jun 2011
Location: Cape Coral, FL
Posts: 393
schweeeet....what is that a 110?
Reply With Quote
  #15  
Old 11-17-2012, 04:48 PM
whunter's Avatar
Moderator
 
Join Date: Dec 2003
Location: Metro Detroit, Michigan
Posts: 17,359
yes

Quote:
Originally Posted by SpecialDelivery View Post
schweeeet....what is that a 110?
YES

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:21 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page