Assuming that it will start.....fire it up and crack the fuel lines at the IP ~1/8 turn, one at a time, then retighten. Idle should deterioate if that cyl is firing. If no change, you found the bad one(s).
Thread: 300 sd dead cylinder, which one?  |
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Started 6 months ago by beeman
I drove my 300sd sixty miles freeway, the car ran like a bird , I returned running on four cylinders, what a let down. Now which is the offending pot? It is not as tho' a person can short out a spark plug as in gas etc. I am guessing I have a faulty injector but there must be other possibilities. I need help on this one anybody please....
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beeman replied 6 months ago
Thank you TMAllison, the engine does start and I will do the procedure to-day.
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beeman replied 6 months ago
Quote:
Originally Posted by TMAllison
Assuming that it will start.....fire it up and crack the fuel lines at the IP ~1/8 turn, one at a time, then retighten. Idle should deterioate if that cyl is firing. If no change, you found the bad one(s).
#5 cylinder was found to be dead and we removed the injector and found ...
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TMAllison replied 6 months ago
Don't know what that would be; some sort of fuel contamination?
Teh next step is to swap that inj with another and see if the miss moves with the inj that came form the bad hole. That confrims the inj is the issuse and not compression or the IP.
EACH time an inj is torqued it OUGHT to receive a new crush washer. This protects the inj nozzle by sealing it from excessive heat exposure....
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240D 3.0T replied 6 months ago
Quote:
Originally Posted by TMAllison
EACH time an inj is removed it MUST receive a new crush washer.
This is right.
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beeman replied 6 months ago
Thanks for the advice. I need to know more about injectors. The crush washer will be replaced. It sure would be great to have the MB special tool to remove inj with two flat sides on a round nut. Thanks again.
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240D 3.0T replied 6 months ago
Quote:
Originally Posted by beeman
It sure would be great to have the MB special tool to remove inj with two flat sides on a round nut.
What are you talking about?
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beeman replied 6 months ago
Quote:
Originally Posted by 240D 3.0T
What are you talking about?
The inj has a round nut with two flat sides for a special MB socket tool. We removed the cam cover and removed the nut and the springs, needle and two washers. The bottom washer with a relief machined into it is very badly worn and the curl of ...
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240D 3.0T replied 6 months ago
Quote:
Originally Posted by beeman
The inj has a round nut with two flat sides for a special MB socket tool.
That is the precombustion chamber collar.
I strongly suggest you figure out what you're doing instead of guessing and randomly tanking things apart! If you keep this up you are going to be in FAR worse ...
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beeman replied 6 months ago
Quote:
Originally Posted by 240D 3.0T
That is the precombustion chamber collar.
I strongly suggest you figure out what you're doing instead of guessing and randomly tanking things apart! If you keep this up you are going to be in FAR worse shape than a simple misfire.
Yes I appreciate your comment and this has...
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