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 06-23-2011, 04:49 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
Broken Flywheel bolts

Trying to save a buck I re-used the flywheel bolts. Unfortunately, 2 broke off. Does anyone know the easiest way to remove the remainder of the bolt? Easy out?
Now I'll remove the remainder and replace with new bolts.

Reply With Quote
  #2  
Old 06-23-2011, 04:50 PM
Registered User
 
Join Date: Dec 2006
Location: beautiful Bucks Co, PA
Posts: 961
Left handed drill will probably take them right.
Reply With Quote
  #3  
Old 06-23-2011, 05:38 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,281
No, a Left handed drill will take them left...
LOL....
if you have to buy a left handed drill bit....and this really is a magic solution most of the time... you can use right handed ones to do pilot holes to make sure you are centered... then just make sure you are leaving safety distance to the threads .. but once you get the insides out...and the pressure is counter clockwise they usually come right out.
Reply With Quote
  #4  
Old 06-23-2011, 07:27 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
So I should use a regular bit to drill a hole and then use a left handed drill bit to extract the remainder of the bolt?

I'll also have to read up on the torque and angle(?) of the bolts. Obviously I misunderstood what torque the bolts should be.

Charlie
Reply With Quote
  #5  
Old 06-23-2011, 07:33 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,281
You probably do not have any left handed drill bits in your tool box...
I had to try three bolt places in Austin to find them back when I first tried this...
So I was trying to give you the cheapest route.... is it perfectly ok to use a regular right hand drill to take it out several steps... then when you get to the last step use the left hander and it should back it right out..
Now, if you have the money... buy a whole set of left handers... but do not let any ' helper' use them... as they will dull them fast not remembering to turn them the correct direction.... LOL
I could be wrong but I do not think the flywheel bolts use the ' torque to lb then add 90 degrees rotation as do SOME of the head bolts.. be sure to check on that ...
Reply With Quote
  #6  
Old 06-23-2011, 08:02 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
Flywheel bolts.

This angle of rotation thing has me concerned
Reply With Quote
  #7  
Old 06-23-2011, 08:13 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,281
Ok.. be sure to run a proper size tap into that hole first.
Automotive torques assume ' lightly oiled threads' ...someone will dispute that statement....and they will be wrong.
Be sure your bolt threads are clean with no burrs.
Know how to use a torque wrench... measure the one you use if it is a click type first.... mine are the old bending type and one must be sure to be applying the pressure with the handle centered...
Take it up to the specified torque in the fashion required... IE..if they say use a star pattern and go up in 20 ft lb increments ... do it that way.
When you get to the specified torque then use a right angle and mark how far that rotation is.... do not use a torque wrench for this part.. use a breaker bar if you have one. Turn to correct angle and leave it alone.
Oh,,, and use new bolts.....LOL
Have a cold drink...
Reply With Quote
  #8  
Old 06-23-2011, 08:22 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
Thanks, that is some great info.

Charlie
Reply With Quote
  #10  
Old 06-23-2011, 10:33 PM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,649
Harbor Freight has the Chicom left hand drill bits.

Charlie
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
Reply With Quote
  #11  
Old 06-24-2011, 10:15 AM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
The left hand drill bits are great if you can get 'em or wait for them.

The following alternative might work for you.

1) Take out the bolts that didn't break and remove the flywheel

2) If the snapped off bits are protruding used vise grips or what ever to remove (may be cut a slot in a protruding head with a Dremel type thing and back out the bolt with a flat blade screw driver)

3) If the snapped off bolt doesn't stick out you could turn the crank so that the snapped off bolt is positioned in the gap in the transmission adapter plate where there might be enough space to use a normal drill bit to drill forward - thus pushing the bolt out of the flange on the crankshaft and into the gap between the block and adapter plate...

...measure the gap between block and adapter plate and compare with length given in the picture in post #6 to be sure!
__________________
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!

Last edited by Stretch; 06-24-2011 at 10:18 AM. Reason: Corrected post number
Reply With Quote
  #12  
Old 06-25-2011, 01:51 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
Well I removed the remaining 9 flywheel bolts. There were only 2 broken bolts(?)(I don't know where the other broken bolt went to) which I removed with Channel Lock.
I've priced the flywheel bolts and they are somewhat expensive. I haven't priced them at the dealer although I would think that they would be about double.
Is the danger of re-using the bolts that they will break once that the engine is running or that the bolts cannot be torqued because they have stretched too much?

Charlie
Reply With Quote
  #13  
Old 06-25-2011, 02:08 PM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Charlie,

I can't remember exactly how much my flywheel bolts were at the dealer but they weren't hyper stupid - if I remember correctly they were about 3 euros a piece.

The FSM specifies the stretch limit if I remember correctly. But seeing as what has just happened, I personally would be replacing with new.
__________________
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
  #14  
Old 06-25-2011, 02:15 PM
Registered User
 
Join Date: Dec 2006
Location: Birmingham Alabama
Posts: 161
I agree I don't want to risk it. The prices range from $6.50-$8 per bolt.

Charlie
Reply With Quote
  #15  
Old 06-25-2011, 02:18 PM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
Asking the dealer for a price doesn't cost money - have you asked fastlane yet?

__________________
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
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 03:50 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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