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  #1  
Old 11-17-2009, 12:40 AM
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Injector tester

Hi All,

I just had to share pictures of my new toy.

It worked slick for rebuilding the injectors on my 240D. I splurged and found the test guage on eBay (...could never have justified full price...). It's not fluid filled, but the graduations are every 10 PSI - works great! And the hydralulic pump is a max 2850 PSI (~200 bar) too. I had another set of spare injectors so was able use shims to balance all well within spec; car runs great!

Thanks to all who shared their experience on building their own!

Cheers,
Andy
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Injector tester-diesel-injector-tester-1.jpg   Injector tester-diesel-injector-tester-2.jpg  
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Old 11-17-2009, 02:15 AM
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Looks very professional.

The Factory Made Nozzle/Pop Testers do not have Liquid Filled Gauges. But, they have a valve that isolates the gauge so you can work the handle and get the air out without damaging the Gauge.

I think yours has that vlave also.
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Old 11-17-2009, 10:46 AM
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Yes, I saw one of the forum members had put a one way flow control valve just before the guage. The pressure relief valve on the pump itself backs off the pressure ok, but in addition, the flow control can ease the needle back down to zero more smoothly.
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Old 11-17-2009, 11:02 AM
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Looks good ! The canister on the back is for filling with diesel and checking level ?
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Old 11-17-2009, 11:09 AM
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Yes, that's correct. I actually had it left over from another project and put it to use (...New England packratting skills put to use...). It also acts like an expansion reservior for when you back off the pressure, so the level varies slightly in use. It's a bit of a pain to get fuel funnelled into it, but since very little fuel is used when testing it's not too bad.
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Old 11-17-2009, 11:32 AM
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Nice...

I tried the home brew model using a cheap bottle jack some years back. I did manage to make it work for about 10 injectors. I was pumping it up and heard a squealing whistle and "found" a crack in the little pump section. Yours looks a lot better.
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Old 11-17-2009, 11:40 AM
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Thanks Sean. I appreciate the kudos, especially from your area of expertise!

Rebuilding the injectors was a fun project and very rewarding being able to use the homemade tester.

... hmmm, now on to pull the injectors out of my 300D parts car to play with...
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Old 11-17-2009, 03:12 PM
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That's a SWEET application!
Can you tell us where you got your parts? Is that a Harbor Freight pump?
Thanks,
Dan
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