Quote:
Originally Posted by dieseldan44
I have a set of both in the my 617 turbos.
The BOSCH nozzles have a small pintile passage that can get clogged, especially with WVO use. They are louder and run rougher.
The MONARK nozzles dont have small passages to get clogged. They are noticeably quieter and smoother running.
Fuel mileage are unoticeably similar.
I dont have bosio experience.
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Yes that is the stock Bosch for 617.952 and their replacment nozzle for previous Diesels.
The later Bosch Nozzles have a similar design to the Monak Nozzles but are still made in India. No point in paying the same or more for a lower quality Nozzle or chinese copies.
The Monark and later Bosch Nozzles use a flat spot on the side that allows for the idle fule to pass and does not clog up like the drilled passages.
Bosio Nozzles have no special mechining for the idle Fuel.
The attached diagram shows the very tiny drilled passages #14 and #15 that are in the stock Bosch Nozzle for the 617 engines.
Note that if the Car owner does regular Diesel Purges those passages will likely remain clean. But once they are clogged up the Diesel Purge fluid likely cannot pass into the drilled passages (you likely have to take the Nozzle apart and pick the Carbon out of the passages or use an ultrasonic cleaning take to get them cleaned out).