Fuel Injector questions

[Jan Pinkowish]

-----Original Message-----
Message: 7
Date: Sat, 19 Aug 2006 20:24:00 EDT
From: DGraber460 at aol.com
Subject: Fuel Injector questions

I have 3 different sets of injectors with 3 different part numbers.
The family album shows #049-133-551 A as the part number for all years  of 
URQ in US (83-85). It shows the same number for '88 5KTQ, but superceded by  
026-133-551.
 
One of my sets is number 049-133-551 A.
The other sets are 437-502-023, and 437-502-015
All have "014" in a circle stamped on them as well. Is that a flow rate  
reference?
Some have numbers stamped on the hex portion as well and some don't.
 
Any injector Gurus out there that can shed dome light on this?
On testing, some have better spray patterns than others, but I don't want  to 
mix and match unless they are the same flow rates.
TIA 
 
Dennis 
Denver
<><><><>

Hi Dennis,
049 133 551A injectors have a dished spray end(for the pattern) and no air shroud cap.

026 133 551 injectors have a flat spray end with a dished air shroud cap over it and use the 2-piece injector inserts.  The top insert is brass and the bottom insert is plastic.  Air is injected from the head into through a hole in side of the brass insert and then down into the plastic insert to cool the injector.  These are used on the 85-87 4kq, 4k, AWA later 5k, 5kt, and 5ktq.

0437 502 023 and 0437 502 015 are Bosch numbers.

049 133 551A and 0437 502 023 are the same injector.  If you type either number into autohausaz.com, the same part appears.

If you enter the "015" and "023" part numbers into autohausaz.com web page, you get the same picture, but 2 different prices. 

These are all coarse thread injectors, so the operating pressure for the different numbers should be the same.

Stamped numbers on the hex portion are Bosch production numbers.

I called Bosch USA, and none of the techs knew or could source info on injector flow rates.  I tried looking through Bosch Germany website with no luck.  I don't remember what I found with Google.

Bottom line?  Choose the five best injectors with 049 133 551A or 0437 502 023 numbers.

HTH

Jan Pinkowish