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jdemaris
01-28-2005 06:13:30
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Re: cleaning/servicing/adjusting injectors on 188D in reply to BKahler, 01-28-2005 03:25:03
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Hooking them to the injector pump is, in no way, a thorough test. It IS a good simple test to ascertain if they are firing at all, if any orifices are plugged, but that's about it. When you test the injectors on an actual injector tester - i.e. a "pop" tester, it allows to check leak down rate before the check valves crack, set opening pressure, and a few other things. Running the injectors off the injector pump is too rapid and also does not provide you with the pressure setting on the injectors. We used to rebuild quite a few types of injectors, but usually NOT the little pencil injectors like the 188D or 207D Case uses. Some larger injectors allow either cleaning and relapping of the tips - or complete replacement of JUST the tips. With the little pencil injectors the tips are not replaceable. We used to take them apart, clean them up, and lap the valves a bit, and get some extra use out to them - but they will not last or perform as new. So, you say you're on a budget? You CAN do a quick test by hooking to the injector pump - but that's about it. And, you might extend the usuability of the injectors by resetting the crack pressures on them and cleaning and lapping - but unless you know what you're doing, it's not a good place to cut corners. The excess carbon could be from many things - worn pistons and sleeves, bad injectors, injector pump overfueled and/or the timing advance not working properly, etc. etc. The 188Ds are known to throw one particular rod but I can't recall which one. I have one in my shop with a rod hanging out the side of the block - and I've seen many other 580CKs with the blocks patched in the same spot.
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