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 ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-04-2008, 09:36 PM
Actros617's Avatar
Ich fahre dieseltypen
 
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,103
Question Injector replacement question....

I am about to replace my injector tip in my 300SD, so after i remove the injector and R&R my tip reinstall the the injector torque it and install it back, do i have to any fuel priming????
__________________
Benz's in our garage
2008 E320 Bluetec 127k mi

Sold
1987 300SDL 200K+
1994 S320 181K mi


RIP SECTION

1995 E320 Special Edition [Rear ended]
1984 300SD [Head on collision]
Reply With Quote
  #2  
Old 12-04-2008, 09:59 PM
Registered User
 
Join Date: Jan 2003
Location: Reno/Sparks, NV
Posts: 3,063
No, but on your car you can so you don't have to crank the engine as long. Be sure to use new heat shields. It's also a good idea to test the new nozzles before reinstalling.
__________________
2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL
Reply With Quote
  #3  
Old 12-05-2008, 12:16 AM
Actros617's Avatar
Ich fahre dieseltypen
 
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,103
yes i do have new heat shield, now how do i test the new nozzles, use a injector test bench
__________________
Benz's in our garage
2008 E320 Bluetec 127k mi

Sold
1987 300SDL 200K+
1994 S320 181K mi


RIP SECTION

1995 E320 Special Edition [Rear ended]
1984 300SD [Head on collision]
Reply With Quote
  #4  
Old 12-05-2008, 02:39 AM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
^^I would think.
__________________
83 SD

84 CD
Reply With Quote
  #5  
Old 12-05-2008, 03:20 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 22,456
If no one else had mentioned it the 2 parts of the Spray Nozzle cannot be interchanged with the other Spray Nozzles; keep the parts together.
Likewise do not mix the parts of an 1 Injector keep all the parts (except the Spray Nozzle you are changing) from each Injector together with that Injector.
There is a hand pumped Injector Nozzle Tester with a Gauge on it used to test the Opening Pressure of the injectors. If you want to see what they look like do an Ebay Search "Diesel Injector or Nozzle Tester".
Also when Injectors are rebuilt the lap the precision surfaces inside of the Injector which makes a good sealing surface. If you just swap the Spray Nozzles besides the chance of gettin dirt trapped between those surfaces it just plain my leak a little between the Injector Body and the Nut.
Also to set the Opening Pressure you need to swap different sized shims that go on one end of the spring inside of the Injector and put the Injector on the Nozzle Tester to see what opening pressure you are getting.

To bleed the air from you system leave the Hard Line Nuts up by the Injectors a little loose and crank (with out overheating your Starter or killing the Battery) until you see fuel spurting out from under the nuts. Tighten the nuts and start the engine.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #6  
Old 12-05-2008, 11:47 AM
Actros617's Avatar
Ich fahre dieseltypen
 
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,103
This is great info thx for the input all, also what about the oil in the injector nozzles, do i have to wash it off with diesel additive or just put it it, i also going to clean my injector housing while i am at it too i ll see how it goes...
__________________
Benz's in our garage
2008 E320 Bluetec 127k mi

Sold
1987 300SDL 200K+
1994 S320 181K mi


RIP SECTION

1995 E320 Special Edition [Rear ended]
1984 300SD [Head on collision]
Reply With Quote
  #7  
Old 12-05-2008, 03:14 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
I just made sure all the parts were clean when putting them back together. I sprayed them with brake cleaner. I installed new nozzles a while back. Be sure to tighten the two parts very hard. I followed DG's advice to not gorilla tighten, should'nt have done that, as I had to take 'em back out and do so.
__________________
83 SD

84 CD
Reply With Quote
  #8  
Old 12-05-2008, 03:45 PM
C Sean Watts's Avatar
NOCH EIN PILS!!
 
Join Date: Mar 2006
Location: NC
Posts: 1,318
Keep everything clean as possible.

Dip the cleaned internal parts in clean diesel fuel just before putting them together - NEVER leave anything dry. If you have a torque wrench..

injector halves -
1. 30ft lbs leave it a minute then loosen.
2. 60 ft lbs " " "
3. 65 ft lbs leave it.

injector into head - 55ft lbs or 75Nm.
__________________
1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!
Reply With Quote
  #9  
Old 12-05-2008, 04:07 PM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,282
Quote:
Originally Posted by Actros617 View Post
how do i test the new nozzles, use a injector test bench
You probably can skip the "testing" unless your feeling really unlucky. I have just "swapped in new nozzles and away you go", chances are your fine. That said, I recently sprung to have new nozzles balanced and tested for both my 240s, nice idle now, Depends if you wanta spend the $ Always new seals tho.
__________________

1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #10  
Old 12-05-2008, 04:24 PM
bgkast's Avatar
Rollin' on 16s
 
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
Isn't the injector body torque value 70-80 NM?

I would not install a set of nozzles with out pop-testing. I have rebuilt sets using the original shims and usually one or two injectors are quite a bit off. Springs wear, and you are also using a different nozzle design and manufacturer.
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
Reply With Quote
  #11  
Old 12-05-2008, 05:39 PM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,282
Quote:
Originally Posted by bgkast View Post
value 70-80 NM?

I would not install a set of nozzles with out pop-testing.
I wouldn't either now that I know the pleasure of a smooth idle also having the feeling I did the best I could to have my babies running well. Heck, I've pulled injectors from parts cars, stuck em in, down the road I go. It runs. Nah, I'll have em tested now
__________________

1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #12  
Old 12-05-2008, 05:44 PM
Actros617's Avatar
Ich fahre dieseltypen
 
Join Date: Apr 2008
Location: Oklahoma
Posts: 1,103
I would like to test them but those diesel store DELCO if you ever heard it and the only one in my state is going to charge me $25 buck for 1 injector to test... that like $125 for all of them its a rip off...REALLY
__________________
Benz's in our garage
2008 E320 Bluetec 127k mi

Sold
1987 300SDL 200K+
1994 S320 181K mi


RIP SECTION

1995 E320 Special Edition [Rear ended]
1984 300SD [Head on collision]
Reply With Quote
  #13  
Old 12-05-2008, 07:58 PM
Registered User
 
Join Date: Jan 2003
Location: Reno/Sparks, NV
Posts: 3,063
I have a pop tester in my garage but it got stuck and I couldn't fix it before I installed my new Bosio nozzles. So I took my chances and installed the new nozzles without testing. After they broke in & settled, the engine was as smooth & quiet as with the old Bosch nozzles that I knew were balanced. So I guess I got lucky. Keep in mind though that initially the pop pressures will be slightly different than after break-in. So it's a waste of time to be too picky about the pressures with brand new nozzles. If you reuse the same internal parts from each injector, I think there's a good chance the new nozzles will be balanced after break-in if not before. Testing, especially for spray pattern, is more useful with the lower quality nozzles like the made-in-India Bosch. I'd never install those without testing.
__________________
2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL
Reply With Quote
  #14  
Old 12-05-2008, 09:35 PM
bgkast's Avatar
Rollin' on 16s
 
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
Not to pimp my self, but I test and balance them for $10/each for forum members
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
Reply With Quote
  #15  
Old 12-05-2008, 09:53 PM
Registered User
 
Join Date: Jul 2004
Posts: 6,941
Quote:
Originally Posted by bgkast View Post
Not to pimp my self, but I test and balance them for $10/each for forum members
Keep on pimping.... we lov ya B.
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 11:27 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page