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 06-22-2007, 12:04 PM
Registered User
 
Join Date: Jun 2007
Posts: 7
Question What Exactly does Adjusting the Valves Do?

Does it prolong the engine? Make it run quietier? Get better fuel consumption? Exactly what is it suppose to do?

What if it is done incorrectly, what damage can result from that?

Thanks

Gray 1985 300D

Reply With Quote
  #2  
Old 06-22-2007, 12:12 PM
Registered User
 
Join Date: Nov 2004
Location: North central Texas
Posts: 2,588
Quote:
Originally Posted by Gray 1985 300D View Post
Does it prolong the engine? Make it run quietier? Get better fuel consumption? Exactly what is it suppose to do?

What if it is done incorrectly, what damage can result from that?

Thanks

Gray 1985 300D
First, Yes.

Second, $$$.
Reply With Quote
  #3  
Old 06-22-2007, 12:36 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,875
Quote:
Originally Posted by Gray 1985 300D View Post
Does it prolong the engine? Make it run quietier? Get better fuel consumption? Exactly what is it suppose to do?

What if it is done incorrectly, what damage can result from that?

Thanks

Gray 1985 300D
Valves that are too tight means valves do not close all the way resulting in lower compression, which leads to increased fuel consumption, carbon build up, burned valves, and in extreme cases, piston and valve contact.

Valves that are too loose does not allow proper air intake and poor exhuast expelling. Again, poor fuel economy increased carbon buildup from unburned fuel. If carbon gets trapped on the valve seat, theheat from the premarutely escaping gasses can also burn a valve.

Too much carbon chokes the entire intake and exhaust systems, blocks the prechamber and glow plugs, amoung other things.

Whiskey Dan gave you the condensed version, which is extremely accurate.
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 280K miles

03 VW Golf TDI 5 speed 400K Miles Engine died

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 400K
Reply With Quote
  #4  
Old 06-22-2007, 12:50 PM
F18 F18 is offline
Registered User
 
Join Date: Oct 2005
Location: Massachusetts
Posts: 677
ditto with Whiskeydan and RR Grassi...........think of those valves as valves of a human heart! They control the flow of oxygen rich blood and also the flow of oxygen depleted blood. If the valves don't orchestrate opening and closing on time or don't fully open or close then efficiency is lost and you are fatigued because of oxygen deprivation and a build up of waste products in your system.

Thats my last Friday lecture!

Cheers from sunny Cape Cod
__________________
FRED

Daily Driver: 98 E300TD 199K
Hobby Car: 69 Austin Mini
Past Diesels: 84 300SD, 312K
87 300SDL, 251K
94 Chev. K-1500 6.5Ltr.TD, 373K

Last edited by F18; 06-22-2007 at 12:57 PM.
Reply With Quote
  #5  
Old 06-24-2007, 08:07 PM
Registered User
 
Join Date: Aug 2003
Posts: 49
Is there a DIY link for the adjustment?
Reply With Quote
  #6  
Old 06-24-2007, 08:50 PM
gatorblue92's Avatar
Save the manuals!
 
Join Date: Jan 2006
Location: Delaware
Posts: 3,395
Quote:
Originally Posted by patc View Post
Is there a DIY link for the adjustment?
yep...
http://www.dieselgiant.com/valveadjustment.htm

__________________
1977 MB 240D 4 speed 145K - Nearly Perfect
1995 MB E420 197K - Weekend Toy
2018 Ford F150 5.slow 23K - My DD
2020 Subaru Ascent 10k - Wife's DD

1979 MB 280E 90K - Sold
1983 MB 240D 238K - Scrapped
1984 MB 300D 347K? - Sold
1984 MB 300TD Wagon - 188k - Sold
1987 MB 300E 5 speed 258K - Scrapped
1991 MB 300TE 5 speed 276K - Sold
1993 MB 400E 218K - Sold
1993 MB 400E 130K - Sold
1995 MB E320 Wagon 190k - Sold
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 10:20 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