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#61
04-08-2012, 03:46 PM
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Feels like I made some progress, and its running better, and quieter.
Now, I did find an issue... Seems that the EGR flap vacuum unit on top of the air filter box is dead. when I apply vacuum to it, its not moving and will not hold vac, so assume the membrane is toast. I tried to find info on what this will do to drivability and economy, but as this was a California only spec, there is little info out there. Can anyone tell me if its worth replacing? Looks like its a dealer only part too... $$$$$! This the part sitting on top of the intake box between #2 and #3 runner.. 
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2009 Mercedes ML320 Bluetec 
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#62
04-08-2012, 03:51 PM
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Back to how the motor sounds...
I took this video with the airfilter off. The first few seconds I moved the EGR flap manually, just to show what happens... Then can someone tell me if the intake noise sounds normal? The is a "Dunk-Dunk-Dunk" noise which i have never heard before and sounds odd to my ears.. If it was on a gas motor, I would suspect a burned intake valve... Click image below to see it. 
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2009 Mercedes ML320 Bluetec Last edited by Merkey; 04-08-2012 at 04:07 PM.
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#63
04-08-2012, 04:02 PM
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I can't pull your video up from my iPhone but when I get home I'll check it out. My 603 has a tick as well that's annoying me.
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#64
04-08-2012, 04:12 PM
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Thanks,
Oh, also, I did spend time listening to the motor in general... The ticking that I was concerned about is not easy to trace, but one thing I did find was this... Using a mechanical stethascope, #4 injector sounds different to all the rest... It has a metalic "Ting" that the others dont.. From my records, #4 injector was replaced, so maybe its the correct noise and all the rest are bad! 
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2009 Mercedes ML320 Bluetec
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#65
04-08-2012, 07:15 PM
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Pull the injector and have it checked? They may have used a marginal one when they replaced it?
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#66
04-08-2012, 08:31 PM
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I would disable/delete everything involved with the EGR. No need to replace anything EGR related. Cap/plug any vacuum lines, and make a block off plate that is sandwiched between the EGR and manifold.
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 All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html
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#68
04-09-2012, 12:34 AM
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Quote:
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All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html
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#69
04-09-2012, 08:06 AM
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I'm familiar with the benefits of blocking off the EGR system on a turbo 617. Do the n/a motors enjoy a similar benefit? When I took the intake manifold off my 617 it was lined with thick gummy deposits. I've not notice similiar deposits on the intake on the 190D.
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You can't always get what you want, but if you try sometime you just might find you get what you need.
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