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#16
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Nice job Jeremy! We should get together in SR or Napa one day (or the Windsor PNP) Just picked up a '75 w115 300d (nice car for 300.00!) and also have an '84 euro spec wagon and of course my trusty high mileage still beautiful 300sd.
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#17
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I have a pop tester and have done this job. The injector tips wear out with B100 and I can only imagine what SVO does.
With homebrew B100 or SVO I would clean them every 12K miles. I put in new Monark injector nozzles and saw a huge improvement.
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1991 350SD (updated rods) Biodiesel B100 when I can find it. Dino when really cold outside |
#18
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WVO/SVO I can understand... But B100 made reasonably well should have superior lubricity.
In general, IMO its better to run blends anyway...
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
#19
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Nozzle erosion?
Quote:
The nozzles in the #20 head I bought from Sixto were dirty due to the WVO he was experimentally mixing into pump diesel but there was no erosion that I could see, even under a microscope. I would think that the water in under-dried biodiesel would be the big killer. Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#20
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To the person marking halves and re-aligning them upon reassembly: old alignment doesn't matter nearly as much as torquing to the right spec. Pop pressure is not so much preserved by the closeness of original shell alignment, but by the spring + shim length w.r.t. inside chamber length.
As people mentioned, when you lap halves you shorten the (internal) spring chamber length, which has the effect of raising pop pressure. And when you lap halves, any alignment marks made on the two halves are immediately rendered even more meaningless. Torque to spec, check pop pressure, and adjust shims accordingly, repeat until spec pop is reached. Or, just slap 'em back together and hope they're better than before and if they are, great!
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Cheers! Scott McPhee 1987 300D |
#21
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I think it bears repeating that a BRASS brush is used to clean the nozzle area so as not to scratch the metal.
Clarification required: Jeremy did you remove the nozzle pin from the nozzle, then scrub the end of the nozzle, or did you leave the pin in and scrub the lot? And did you do anything special (brass wire?) about cleaning the nozzle pin hole through the nozzle? thx
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Cheers! Scott McPhee 1987 300D |
#22
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Quote:
I think we need some pictures so we don't talk at cross-purposes. In the 6th picture of my OP, I show all the individual parts. I removed the "nozzle needle" from the "nozzle" and cleaned both, as well as all of the other parts, separately. That included carefully scraping the front surface of the nozzle with a razor blade (after removing the needle), to get the carbon that shows in pictures 3 and 4 off of the nozzle. As you say, it's important to use a brass (soft metal) brush so as not to damage the tips. When I looked at the nozzle needle under a low-power (20X - 50X) binocular zoom microscope, I could see no holes in the needle. I admit to being somewhat confused because other threads talk about holes in the tip. I concluded that the other threads were talking about OM61x-family engines. Did I miss something? Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#23
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You're right, let's use same terminology, I'll follow the picture in this thread.
What I meant was, when you take the nozzle needle out of the nozzle, do you plunge anything down inside of the empty nozzle with any cleaning action? The hole I speak of is very visible to naked eye, it's where the tip of the nozzle needle goes through the nozzle. Do you attack that hole (from the outside) with any brushing action (needle removed) or running a wire through the hole? That's what I meant to ask. I get that you removed surface carbon on the face of the nozzle/injector, but it's what goes on in that very tiny region of the hole that matters most.
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Cheers! Scott McPhee 1987 300D |
#24
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Clarification
Quote:
Jeremy
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#25
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There are tools specifically designed to do that job.
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#26
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Would you mind sharing it with the forum?
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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed. W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html 1 X 2006 CDI 1 x 87 300SDL 1 x 87 300D 1 x 87 300TDT wagon 1 x 83 300D 1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry. |
#27
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That is a lot like asking your dentist if you could borrow his drill so you could fill your own cavity. There is a lot more involved than just having the right tool.
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#28
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Great write-up Jeremy. I am definitely going to do this on my 84 300D. My impression in the past has been that there are special skills and tools involved. There certaily are some skills here, but I can handle it.
Are those your hands holding the injector or is that a professional model? There is no dirt. Not even under the fingernails. Richard
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85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale** 84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds 00 Toyota Sienna 208K (Sold) 15 Subaru Outback 43K 11 Subaru Outback 67K 98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now. 30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60 |
#29
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Quote:
"There are special skill and tools specifically designed to do that job"
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed. W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html 1 X 2006 CDI 1 x 87 300SDL 1 x 87 300D 1 x 87 300TDT wagon 1 x 83 300D 1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry. |
#30
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My hands
Quote:
Your '84 300D will have different injectors but the pieces should all be similar and likewise the techniques. Jeremy
__________________
"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
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