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#16
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GP test results
Just tested the glowplugs. Wasn't too happy with the results, heh.
Started by removing all 4 from the engine...from rear to front, numbers 4 and 3 didn't have that much carbon buildup on them, but #2 and #1 did. I thought "oh there's the problem! #1 and #2 are bum!" Well...not quite. Exactly the opposite, really. I couldn't get to my battery charger, so I just tested them in the car off the car battery. To verify the relay worked, I took a spare large-thread plug I had laying around for my car and hooked it right up to the wire from the relay. Turn the key ...yay! Glows beautifully. So, relay works (woohoo!). To establish a ground to the plug, I just nestled it in the ground frame on the back of the engine. I then took all 4 and tested them this way. To be sure I had a good ground, I tested each three different times and re-positioned in the frame hole if they didn't glow the first time. The results....the two caked with carbon are good. The two for the front of the engine...uh oh. Explains a bit of the hard starting, heh. Also, I took pictures this time! Now I just have to figure out how to get them on here in a decent enough resolution...so pics to come later. The majority of them are of underneath the car, where the leaking is coming from.
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- 1979 W123 240D 4-speed, 390k miles |
#17
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Quote:
I second the suggestion to get the cooling system pressure tested at a reliable shop. The necessary tools will cost at least as much as having it done once, and an experienced tech is more likely to find the problem quickly.
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'79 240D |
#18
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FYI
Quote:
.
__________________
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/ |
#19
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Update!
Ordered and installed new Bosch glowplugs; reamed out the holes while I was at it and figured I'd do a compression test too. Got my lovely lady out to help me; she cranked the engine while I read the gauge. All 4 cylinders capped on about the 6th, 7th stroke at around 400 PSI, give or take a bit. Installed the new glowplugs with copper antiseize on the threads. The real test will be when she starts it tomorrow morning. The test was done with the engine warm, through the GP holes (obviously). I made sure to check each new gp before I installed them.
Oh, and the leaking? Fuel. From the IP where the hardline to injector #1 is. Is there a seal underneath that hex or something?
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- 1979 W123 240D 4-speed, 390k miles |
#20
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Answer
Quote:
Be careful you don't (Gorilla) over tighten the fitting. .
__________________
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/ |
#21
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Could you explain a bit more of this? I'm not entirely sure what you're referring to.
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- 1979 W123 240D 4-speed, 390k miles |
#22
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The lines that go back to the injector pump are held in place with nuts on the injector pump. Follow whunter's directions from there.
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1985 300D 198K sold 1982 300D 202K 1989 300E 125K 1992 940T "If you dont have time to do it safely, you dont have time to do it" "The democracy will cease to exist when you take away from those who are willing to work and give to those who would not." |
#23
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Uh...
Which is the compression nut...? From what I see, each section has 3 nuts; one large one where the fuel comes out and two smaller ones flanking it.
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- 1979 W123 240D 4-speed, 390k miles |
#24
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I think he means the nut connecting the hard line running from the injector to the IP to the IP. It's a 14 mm, I think.
__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." |
#25
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the 240 and older diesel motors should have 17mm wrench size hard line nuts on them.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#26
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Ah
Gotcha.
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- 1979 W123 240D 4-speed, 390k miles |
#27
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Yup.
OM61x = 17mm nuts OM60x = 14 mm nuts
__________________
The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
#28
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Been a while since I played with them, I guess .
__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." |
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