Author Topic: Taking apart injectors (Read 4133 times)

hamradio · « **on:** December 16, 2007, 05:40:24 pm »

Hi,
can I safely disassemble and reassemble an injector, for cleaning purposes, without doing damage or messing anything up?

CoolAirVw · « **Reply #1 on:** December 16, 2007, 08:11:02 pm »

How to http://vincewaldon.com/index.php?option=com_content&task=view&id=20&Itemid=28

More info...http://mercedesshop.com/shopforum/showthread.php?t=155294

hamradio · « **Reply #2 on:** December 17, 2007, 01:53:24 pm »

Thank you very much! Very helpful!

Where do I get new nozzles, and how much are they?

oldskool rich · « **Reply #3 on:** December 17, 2007, 05:58:39 pm »

i got my merc nozzels for £60 from bosch

Vincent Waldon · « **Reply #4 on:** December 17, 2007, 06:37:23 pm »

Quote from: "hamradio"

Where do I get new nozzles, and how much are they?

The vast array of Worldpac suppliers has them at around the $15 dollar mark each.

BTW... it would be helpful if your QTH was in your profile... the answers to questions like this can be different depending on where on the globe you live !

Vince

previously known as VE1BAI.... many moons ago.

duffer · « **Reply #5 on:** December 17, 2007, 09:51:43 pm »

Quote from: "Vincent Waldon"

Quote from: "hamradio"

Where do I get new nozzles, and how much are they?

The vast array of Worldpac suppliers has them at around the $15 dollar mark each.

BTW... it would be helpful if your QTH was in your profile... the answers to questions like this can be different depending on where on the globe you live !

Vince

previously known as VE1BAI.... many moons ago.

Which nozzles are you referring to at $15?

www.autohausaz sells the 0434 250 103 nozzles for about $8-9.
but the 0434 250 138 (DNO SD273) nozzles are $26.64.

I bought the latter, but I'd rather pay $15 than $26.64

Vincent Waldon · « **Reply #6 on:** December 17, 2007, 10:26:41 pm »

Of course they're out of stock at the moment... so they don't appear in the price listings, but I just bought four 173s for 15 bucks each from bestpriceautoparts.ca.

OM617 · « **Reply #7 on:** December 18, 2007, 01:16:31 am »

Injectors are very precise devices.

Wear clean gloves lubricated in diesel. The acids in your finger's oils can permanently etch the unprotected surface of the nozzles.

Always keep the injector nozzles separate from each other. The nozzles are closely matched to their nozzle body. The injector bodies have a specific thickness spring shim to set he pop pressure.

And as always, use a torque wrench to put them together, don't just muscle them tight.

Op-Ivy · « **Reply #8 on:** December 18, 2007, 02:26:53 am »

Sorry to thread jack but... Do you have to pop test them after following the rebuild procedure?

jtanguay · « **Reply #9 on:** December 18, 2007, 03:28:09 am »

Quote from: "Op-Ivy"

Sorry to thread jack but... Do you have to pop test them after following the rebuild procedure?

no. but it is a really good idea! spray pattern is much more crucial than pop pressure, unless the pop pressure is way off and starts to affect timing.

Vincent Waldon · « **Reply #10 on:** December 18, 2007, 09:21:11 am »

My vote would be "yes"; it's a great idea to test/calibrate them after rebuilding... for a couple of reasons:

- I personally find the rebuilding process tends to up the breaking pressure... sometimes substantially. Perhaps I lap too much... ;-)

- quite possible to get a bum nozzle from the factory, or have something in the injector bind etc. Both have happened to me.

- it's nice to confirm they are not going to leak *before* installation

vw-uziel · « **Reply #11 on:** December 19, 2007, 03:18:22 am »

Ok, what injectors do i need for the turbo setup on my car. I live in South Africa so VW diesel stuff is quite scares here.

blkboostedtruck · « **Reply #12 on:** December 19, 2007, 03:44:11 pm »

if you have a TD pump that has the LDA on top use the 155 bar injectors!
Duane

Author Topic: Taking apart injectors (Read 4133 times)

OM617