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#1
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Glow plug is loose
I started changing out my gp's today on my 84 300d. I got my front one out and seemed somewhat carboned up. I checked the archives on "what to do" at that point and decided to just twist a 6mm allen wrench into the hole to do a slight reaming. I then turned the car over to blow out any carbon. Upon putting the gp back in, it seems to wobble within the threaded hole and goes in farther than the others 'bottom out' at. From what I can see of the pre chamber threads, they don't appear stripped or anything of the sort. wondering if there was some type of washer or bushing I may have blown out of the hole opening. The new gp's match the old almost exactly except for the new ones are slightly tapered on the end. #2 gp went in fine and tight but i did not do the reaming and blowout. Ideas?
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Whoever dies with the most toys......Wins! 1984 300d 165k miles |
#2
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As far as I know there isn't any washer or bushing. The GP's thread in as they are. Only thng I can think of is that you cleaned out some of the carbon and it now the GP threads in deeper. As far as using an allen wrench, I would never stick anything without threads into something with theads as that would tend to flatten the threads. If you need to clean threads, always use a thread reamer.
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#3
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same on mine, works fine
Hello pdxman
Same as on mine which works fine. #1. Glow plug goes in 1.5 mm deeper than the other four. No problems so far, it runs fine and starts at -10F on glow plugs. I will be curious to know why this happens. Have a great day.
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#4
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I don't believe I did anything to the threads as the allen wrench I used was slightly larger than the size of the tip but smaller than the diameter of the threads. Does anyone know how deep the prechamber is? If I snug the GP all the way up to the shoulder of the plug I won't go in too far and damage something will I?
Thanks
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Whoever dies with the most toys......Wins! 1984 300d 165k miles |
#5
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Well, I finished doing all five plugs (bosch) today. I just skipped the part on reaming the holes and had no further trouble.
I didn't keep track of the exact time it took as I didn't dedicate all my time at once, but would guess I spent nearly four hours changing all plugs out without removing any of the fuel lines. Is it just me, or when working on cars is the number one item I spend time on is trying to retrieve dropped tools? If I didn't keep one of those spring loaded part retreivers handy I would still be out there looking for a dropped wrench between the pump and the lower crankcase.
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Whoever dies with the most toys......Wins! 1984 300d 165k miles |
#6
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Maybe we need strings on our wrenches, just like our mothers did with our mittens. Those deep engine crevices must be magnetic: the bigger the hurry the deeper the wrench/part goes.
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daBenz - 1970 220D |
#7
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