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 05-03-2006, 06:42 PM
Registered User
 
Join Date: Aug 2002
Location: Vancouver, BC
Posts: 69
Question Changing Spark Plugs

I have the spark plugs.

But I haven't attempted it yet because I don't have a torque wrench (and don't plan to buy one) and I wanted to get someone's input first.

So, if I screw in the plugs by hand, should I turn it about 1/4 turn or 1/2 turn with the socket wrench. How much would it take to get it to the approximate right torque?

Please advise.

__________________
'90 300E
Lowered with Eibach Springs
Mouldings and bumpers painted body color
Clear front corners
94/95 W124 Taillights
Reply With Quote
  #2  
Old 05-03-2006, 06:56 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,695
if you have a 12" wrench pull about half as hard as you can.

if shorter 3/4 as hard as you can.

i have never used a torque wrench yet and i have never stripped one out or had one come loose in 40 plus years.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #3  
Old 05-03-2006, 08:29 PM
Registered User
 
Join Date: Sep 2004
Location: DFW / Collin County Texas
Posts: 1,882
I too have never used a torque wrench, but I can say that if you can't rely on experience to know just how "snug" to make them without stripping them, you really should go out and buy at least a very basic torque wrench. If you try to skimp and end up stripping your head, you'll be very very upset!
__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280
Reply With Quote
  #4  
Old 05-04-2006, 09:10 AM
Sportlines
 
Join Date: Oct 2004
Location: Johnson City, TN
Posts: 985
I agree with the last post. If you have to ask, then go buy the torque wrench. No one can tell you in words how tight is tight enough. It's an experience thing. You really really don't want to screw this up.

Steve
Reply With Quote
  #5  
Old 05-04-2006, 09:49 AM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,281
Taper seat plugs achieve the proper 12 lb-ft torque very quickly after hand tight - not like gasketed plugs that require another half turn or more to achieve torque.

Bottom line - get a torque wrench! Google on Harbor Freight. Get a 3/8 drive for small jobs and a 1/2" drive to bigger jobs like wheel bolts. They are not expensive.

You also need a special tool to pull the plug wires if you don't want to wreck them. I gave a Snap-On number some time ago. Search the archives.

If you're too cheap to buy proper tools, consign the job to a pro.

Duke
Reply With Quote
  #6  
Old 05-04-2006, 11:50 AM
Registered User
 
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,947
Bosch Web site lists how far to turn the plug to achieve proper tightness.
__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles
Reply With Quote
  #7  
Old 05-04-2006, 08:37 PM
Registered User
 
Join Date: Sep 2003
Location: Suburban Washington DC
Posts: 893
On some of these engines that are packed in so tight its hard enough to tighten a plug with an ordinary 3/8 inch drive socket wrench. It's near impossible to do it with a 18 inch long torque wrench, and if you have a u-joint or wobble extension between the plug socket and the torque wrench the readings won't be accurate anyway.

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 08:53 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