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  #31  
Old 07-11-2011, 06:15 PM
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1987 w124 300D
 
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Location: Edmonton, Canada
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Quote:
Originally Posted by tangofox007 View Post
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.
I meant to ask my dentist that the other day...


c'mon this is a DIY forum!

We live dangerously here by attempting our own fixes. Live and die by them.

Risk a little and share the secret sauce of what you know about these tools, and what to do with them, that is, if you know. Otherwise maybe point us to your dentist.
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  #32  
Old 07-11-2011, 07:21 PM
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Quote:
Originally Posted by scottmcphee View Post

Risk a little and share the secret sauce of what you know about these tools, and what to do with them, that is, if you know.
The problem, Scott, is not the I don't know anything about injector tools. The problem is that the Bacharach tools that I have are a bit "vintage" and are no longer available through normal sales channels. So I don't know how or where the typical DIY'er would obtain them. And for those DIY'ers just interested in fixing up a set or two of injectors, new nozzles are likely a more cost-effective approach than spending money on a nozzle cleaning kit. Even then, you are absolutely stabbing in the dark without a nozzle tester.
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  #33  
Old 07-11-2011, 08:11 PM
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Special skill, special tools, stabbing in the dark ??

As a die-hard DIYer, I will try everything, anything to get things fixed without resorting to anything special. Improvisation is the name of the game, not so much I cannot afford them but adventure is fun. I hack Kilma relay, convert A/C, design electronic circuit and improvise. I am admit I am not good with engine or tranny. I will try anything as long as I do not put myself or other road users at risk. This forum has a wealth of info, all about DIY and there is no 'Special' about it. Just look at the ingenious methods some members came up to fabricate tools to get things done. That said, there are special MBZ tools that are needed but IMO not with injectors. Any backyard mechanic can service an injectors with ( may be without ) a pop tester.

We do not need a dentist with special drill bits.
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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

2 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.
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  #34  
Old 07-11-2011, 08:30 PM
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Quote:
Originally Posted by ah-kay View Post
That said, there are special MBZ tools that are needed but IMO not with injectors. Any backyard mechanic can service an injectors with ( may be without ) a pop tester.
That's great to hear. Now I don't have to feel bad about not sharing my tools!

In any case, ah-kay, I will help you. If you will send me the injectors that you have "serviced" yourself, I will be happy to test them for you. Let's put your theory to the test.
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  #35  
Old 07-11-2011, 09:15 PM
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Quote:
Originally Posted by tangofox007 View Post
That's great to hear. Now I don't have to feel bad about not sharing my tools!

In any case, ah-kay, I will help you. If you will send me the injectors that you have "serviced" yourself, I will be happy to test them for you. Let's put your theory to the test.
I will bookmark this thread and take up your offer.

The injectors I opened up and re-aligned afterwards are in use now. Actually, they are on their way to SFO to pick up my daughter returning from Machu Pichu, Puru in the 300D. They seems to perform OK, they HAVE to, as it is doing a 500 mile trip and the car will be left in Santa Cruz.
__________________
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

2 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.
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  #36  
Old 07-12-2011, 12:50 AM
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Homebrew B100

Quote:
Originally Posted by JHZR2 View Post
WVO/SVO I can understand... But B100 made reasonably well should have superior lubricity.

In general, IMO its better to run blends anyway...
I like B100 better than diesel, but not even the factory-made B100 around here is ASTM tested. The homebrew stuff probably has free fatty acids, some methanol, a little water, glycerin, glycerides, and who knows what else in it.

From my first-hand experience homebrew B100 will eat your injector tips.

As for higher lubricity of biodiesel, some of it comes from the impurities.

B100 that has been distilled (colorless) will oxidize fast with no added antioxidants, all B100 will grow bacteria without the addition of biocide.

Degraded B100 will eat your injector tips.

When running B100 I always have spare fuel filters in the trunk.
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  #37  
Old 07-12-2011, 12:56 AM
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Originally Posted by Jeremy5848 View Post
That is interesting -- commercial or homemade biodiesel? My '87 300D Turbo (W124, OM603) ran on commercial B100 for about 6,000 miles and since then (another 20,000 miles) commercial B20. I noticed no tip erosion when I removed the #14 head.

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
I couldn't see the wear on the injector tips (just carbon), but when I pop tested them the spray pattern was ugly compared to my new Monark injectors.
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Dino when really cold outside
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  #38  
Old 07-12-2011, 01:02 AM
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Quote:
Originally Posted by scottmcphee View Post
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

I soaked my completely disassembled old injectors in carb cleaner and cleaned them with the brass brush and a little brass pick. Pop testing / balancing before installation.
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Biodiesel B100 when I can find it.
Dino when really cold outside
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  #39  
Old 07-12-2011, 01:11 AM
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Not a hard job

Quote:
Originally Posted by scottmcphee View Post
I meant to ask my dentist that the other day...


c'mon this is a DIY forum!

We live dangerously here by attempting our own fixes. Live and die by them.

Risk a little and share the secret sauce of what you know about these tools, and what to do with them, that is, if you know. Otherwise maybe point us to your dentist.
Rebuilding injectors with new tips and and re-balancing is an easy job. If changing the oil is a 1, and rebuilding your turbo is an 8, this would be a 2. Having a pop tester and a box of shims is key.
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1991 350SD (updated rods)
Biodiesel B100 when I can find it.
Dino when really cold outside
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  #40  
Old 07-12-2011, 09:59 AM
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Quote:
Originally Posted by Bob Albrecht View Post
Rebuilding injectors with new tips and and re-balancing is an easy job.
It's also not what this thread is about.

Quote:
Originally Posted by Bob Albrecht View Post
Having a pop tester and a box of shims is key.
Balancing your tires is easy, too. All you need is a dynamic balancing machine and a box of wheel weights.
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  #41  
Old 07-12-2011, 10:53 AM
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1987 w124 300D
 
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Quote:
Originally Posted by Bob Albrecht View Post
Rebuilding injectors with new tips and and re-balancing is an easy job. If changing the oil is a 1, and rebuilding your turbo is an 8, this would be a 2. Having a pop tester and a box of shims is key.
Rebuilding is easy, done that. I have a pop tester.

Cleaning is what I was asking about.
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  #42  
Old 07-12-2011, 11:03 AM
RML RML is offline
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Quote:
Originally Posted by Bob Albrecht View Post
Rebuilding injectors with new tips and and re-balancing is an easy job. If changing the oil is a 1, and rebuilding your turbo is an 8, this would be a 2. Having a pop tester and a box of shims is key.
I have read the thread about making a pop tester and I may do that. Where does one obtain a set of shims. I recall reading a thread that discussed the difficulty of finding a source for these.

Richard
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85 300D 72K Anthracite Grey (Rutherford) 0-60 in 13 seconds
84 300D 331K Black (Rufus) 0-60 in 14 seconds (adjusted the ALDA)
00 Toyota Sienna 208K (Sold)
15 Subaru Outback 22K
98 Ford Taurus 62K (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
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  #43  
Old 07-12-2011, 11:07 AM
RML RML is offline
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Quote:
Originally Posted by scottmcphee View Post
I meant to ask my dentist that the other day...

c'mon this is a DIY forum!

We live dangerously here by attempting our own fixes. Live and die by them.

Risk a little and share the secret sauce of what you know about these tools, and what to do with them, that is, if you know. Otherwise maybe point us to your dentist.
As long as we are talking about dentistry, I was wondering if a piece of dental floss through the hole would be effective in cleaning it? I would think that the unwaxxed stuff would work best to keep from leaving any wax in the hole.

Richard
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85 300D 72K Anthracite Grey (Rutherford) 0-60 in 13 seconds
84 300D 331K Black (Rufus) 0-60 in 14 seconds (adjusted the ALDA)
00 Toyota Sienna 208K (Sold)
15 Subaru Outback 22K
98 Ford Taurus 62K (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
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  #44  
Old 07-12-2011, 11:12 AM
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Quote:
Originally Posted by RML View Post
As long as we are talking about dentistry, I was wondering if a piece of dental floss through the hole would be effective in cleaning it? I would think that the unwaxxed stuff would work best to keep from leaving any wax in the hole.

Richard
Would that be the hole in the nozzle or the hole in the needle valve?

Either way, the answer is no. In the case of the nozzle, it's the valve seat that needs cleaning; the tool for that is a brass scraper machined to match the angle of the seat. The needle valve hole is usually cleaned with an appropriately-sized fine wire.
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  #45  
Old 07-12-2011, 11:22 AM
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Quote:
Originally Posted by RML View Post
Where does one obtain a set of shims. I recall reading a thread that discussed the difficulty of finding a source for these.
Not only are shims hard to find, buying a set isn't exactly cost effective at the single car DIY level.
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