Quote:
Originally Posted by funola
Twitch, why not tell us more about the "pintle hole" instead of telling us to read the book? Not everyone have access to the FSM you know. 
Are you saying there is a tiny hole through the center of the pintle? what is its diameter and depth? Why is it there and how does it work? The picture you posted is too small to make out the details. |
You need to search it. I can't write a book about this for each new group of MB owners.
Check eBay for a manual. The classifieds here may help. The manual for any 61x engine would cover this topic. I have bought them for less than $10 and as much as $50, depending on the version.
The hole in the middle of the pintle connects to a cross hole and the bulk of the fuel injected should pass through the holes. The holes are so small that you will probably never notice them without magnification. Bosch sells tiny wires to clean them, another member here posted that he uses a dental drill, I have used a tiny brass wire. Be careful not to break off the tool in the hole. Steel can scratch the sealing surfaces and make the injector leak.
Another often overlooked part of injector maintenence is the leak-test. If the injector leaks at pressures approaching pop-pressure it is probably not worth messing with, cleaning may fix it.
This link will take you to a thread with what is probably the best information on this topic that you will find on this site.
http://www.peachparts.com/shopforum/showthread.php?t=155294