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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-14-2003, 04:54 PM
Registered User
 
Join Date: Jan 2003
Location: USA
Posts: 699
240D valve adjustment questions

Dear friends:

When you prepare to do valve adjustment on a 240D (1981):

1) Do you have to remove both the radiator, fan shroud and fan in order to access and rotate the crankshaft using a 27 mm socket and ratchet drive?

2) Is it possible to just remove the fan without removing the fan shroud and radiator? I don't want to remove the radiator because it seems hard to remove the oil cooler from the radiator.

3) The radiator drain hose on my 240D is made of some blue plastic, and its neck got broken when I tried to turn it in order to drain the coolant. What should I do to fix it? (just drill through it and replace with another drain plug?

4) I also tried to rotate the crankshaft (and hence camshaft) by rotating the power steering pulley bolt. However, I could only rotate it a little bit before it became very hard to turn (so I stopped because I did not want to destroy the power steering pump). Was it because of the high compression in diesel engines?


Thank you in advance for your help.

Eric

Reply With Quote
  #2  
Old 04-14-2003, 06:45 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: Eastern TN
Posts: 20,841
1) You shouldn't have to remove anything to get to the crank bolt if you have the right length of socket and extension.

2) Just the shroud. Maybe not even that if you know what you're doing.

3) I don't know about that. Maybe best to seal the radiator drain valve and pull the lower hose to drain the cooling system in the future.

4) You can't destroy the power steering pump that way. The belt will slip before you do any mechanical damage.

These engines are not particularly hard to turn even with the relatively high compression. I'm in terrible physical shape and I can turn a 400psi OM603 without undue strain. Remove the glow plugs so there's no compression. Don't use a puny 8" wrench.

Only turn the engine in the direction it turns when operating. That's clockwise looking at the engine from the front.

Sixto
91 300SE
87 300SDL
83 300SD
Reply With Quote
  #3  
Old 04-14-2003, 07:47 PM
haasman's Avatar
Registered User
 
Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,097
I used to turn the engine with the power steering pump nut. I pushed down on the belt when I turned it to ensure proper tension. Worked well.

Haasman
__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
Reply With Quote
  #4  
Old 04-14-2003, 09:49 PM
ILUVMILS's Avatar
Senior Member
 
Join Date: Sep 2002
Posts: 3,066
Hi ericnguyen, don't take anything apart!!! Follow haasman's advice. It's the way to go.
Reply With Quote
  #5  
Old 04-14-2003, 11:27 PM
Registered User
 
Join Date: Jan 2003
Location: USA
Posts: 699
If I want to rotate the crankshaft instead of the power steering pulley, I believe the fan must be at least removed in order to have have access to the crankshaft bolt (27mm) either from above or below my 240D.

Eric
Reply With Quote
  #6  
Old 04-15-2003, 07:37 AM
LarryBible
Guest
 
Posts: n/a
It will NOT be necessary to remove the fan to access the crankshaft bolt on a 240D. You will need a 27MM deep socket or 27MM socket and very short extension. Don't turn the engine with the power steering pulley causing excess strain on the belt.

If it were a 300D, then you would be best served to get the fan out of the way, but there is PLENTY of room on the four cylinder.

I noticed that you asked this question AND the question about the transmission plugs. The best way to answer these types of questions is to get on your old clothes and start checking things out with a little experimentation.

Best of luck,
Reply With Quote
  #7  
Old 04-15-2003, 06:12 PM
Registered User
 
Join Date: Jan 2003
Location: USA
Posts: 699
Hi all:

I've just finished adjusting the exhaust and intake valves on my 1981 240D after removing the engine fan, the fan shroud and rotating the crankshaft from above (using a long breaker bar). I used the regular 14 mm wrenches and managed to adjust all 8 valves successfully. It's not really difficult to adjust them with regular wrenches.

LarryBible: on my 240D, if I did not remove the fan, it would be almost impossible to access the 27mm crankshaft bolt from above because the fan hinders the breaker bar, and accessing it from below would require the removal of the fan shroud (which in turn requires the removal of the fan).

For the manual transmission fill plug question, I just want to get everything ready before crawling under a car, especially dirty diesel ones :-)

Eric
Reply With Quote
  #8  
Old 04-15-2003, 08:36 PM
Scott500SEC
Guest
 
Posts: n/a
on my 78 300d i just hooked up an underhood starter switch and bumped the starter to get the lobes where they should be...sure was easy on ME.

Scott L

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 12:58 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page