Black injector tip
Thread Starter
|
Senior User
Joined: Sep 2009
Posts: 366
Likes: 0
Black injector tip
So i pulled the old AD injectors out of my 7.3 and noticed this.
One injector had burnt on textured black oil deposits totally covering the bottom 1" (shinny part) of the injector. Even the orange O ring at the bottom was black, couldn't tell it was ever orange and the brass washer at the tip was black. Black, like an old cast Iron skillet that hasn't been washed in 5 years. Actually had to use a green scrubbie and gasoline to get that black burnt on sootie oily deposit off.
I am assuming thats from a bad injector cup or an injector hold down bolt that became loose? Although the bolt was tight.
One injector had burnt on textured black oil deposits totally covering the bottom 1" (shinny part) of the injector. Even the orange O ring at the bottom was black, couldn't tell it was ever orange and the brass washer at the tip was black. Black, like an old cast Iron skillet that hasn't been washed in 5 years. Actually had to use a green scrubbie and gasoline to get that black burnt on sootie oily deposit off.
I am assuming thats from a bad injector cup or an injector hold down bolt that became loose? Although the bolt was tight.
Posting Guru
Joined: Jan 2007
Posts: 2,364
Likes: 3
From: Gilbert Az.
Replace the washer at a minnimmum, mine would get new cups, washers, injectors serviced, and a compression test, but that's a personal choice! Hoh many miles? Witch injector? What led you to pull injectors? ect....?
and it's a cup killer!
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
This is why we always say to check the injector hold down bolts for the proper 120 in/lbs of torque.
Good routine whenever you pull the VCs is to check the injector holdown bolts, rocker pedestal bolt torque (20 ft/lbs) and ensure that the UVCHs are tight and that no wires are chaffing.
Good routine whenever you pull the VCs is to check the injector holdown bolts, rocker pedestal bolt torque (20 ft/lbs) and ensure that the UVCHs are tight and that no wires are chaffing.
Thread
Thread Starter
Forum
Replies
Last Post
3000gtman
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
4
Feb 2, 2017 08:27 AM
Aune163rd
1983 - 2012 Ranger & B-Series
12
Oct 20, 2016 01:07 PM
bl1989
1987 - 1996 F150 & Larger F-Series Trucks
4
Jul 7, 2016 03:02 AM
Brian Ski 44
1987 - 1996 F150 & Larger F-Series Trucks
6
Jun 26, 2016 06:45 PM
Damonkr
1999 - 2003 7.3L Power Stroke Diesel
14
Mar 25, 2010 09:04 AM
