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Old 11-10-2012, 05:39 PM   #41
E46330iguy
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Yes, that ticking/tapping noise you hear may be the only two things:
1. Bad injectors ! ( because of that, you have rough idle )
2. worn lifters !

dovla
If it was an injector is would smoke like crazy and blow smoke rings at idle, Not to mention make pretty much no power and the car would throw a Code
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Old 11-10-2012, 06:21 PM   #42
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The click doesn't sound like injectors to me. It sounds like lifters. Even gas engines can make a sound similar to that. The rest of the engine sounds normal. Diesels are inherently louder than gasoline cars though. That's what happens when you inject fuel into high pressure air and blow it up with just compression. I've heard good things about putting Seafoam in the oil. I'm pretty sure it's acceptable on diesel engines. Don't take my word for it though.
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Old 12-03-2013, 10:34 AM   #43
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did you ever sort this problem? ive the same noise, when I put a screwdriver to the injectors to listen 2 of them are noisier than the other 2. no erratic idling. just noisy.
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Old 12-03-2013, 10:53 AM   #44
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If only you knew just how high the compression ratio of a diesel is and how much psi the injectors work at along with the fact heat of compression is enough to cause combustion. You'd understand why they are so loud.
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Old 12-03-2013, 11:06 AM   #45
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but a significant notice in noise between the first 2 and the 2nd 2 injectors
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Old 12-03-2013, 12:53 PM   #46
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I know 0.0 about BMW diesels, but, I have owned various VW diesels since 1998. Sounds about the same as every diesel I have ever owned? Common rail is a little quieter, but, if not common rail, and I do not think it is, then that is flat out normal.
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Old 12-03-2013, 12:58 PM   #47
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Have a turbo diesel dodge truck outside that sounds exactly like that and pulls like a mother ****er. Welcome to the world of diesel engines. Enjoy your car!
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Old 12-03-2013, 01:15 PM   #48
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Really doesn't sound that different from some of the direct injection petrol engines (until you get on throttle anyway). Though now that I listen a little closer, I hear two distinct noises. One of them is just the injectors... but there's a slower and lower pitch one that I'm not sure about
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Old 12-03-2013, 01:35 PM   #49
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All the diesel sold in the States now is what is called low-sulfur diesel. It burns cleaner yet largely lacks the lubrication properties the old formula possessed. This causes minor buildup inside the fuel system, i.e. the lines, injectors, pump, so forth. They do include additives to offset this but even still as with the old formula it's a good idea to manually clean out the fuel loop once in a while. Lubro Moly makes a product called Diesel Purge which works wonders. You will have to pull the main supply and return fuel lines and reroute them to just pull the Purge from a container which runs through the fuel loop then back into another container but the product cleans the fuel system out very well. It's something I have to do every couple of years or so to smooth out the engines on my two MB diesels. Furthermore the loud metallic tapping noise is due to nailing injectors. The nozzles are semi-clogged and creating the noise. Diesel purge the system & change the fuel filter afterward. Might pay to have the injectors professionally cleaned.

One could very leisurely get all of this done without turning a wrench by running two or three tanks full of B100 which is 100% biodiesel. Hard to find though. Bio is an extremely effective diesel fuel system cleaner, as well as a superior alternative fuel for diesel engines.

Also get out and do an Italian tuneup every once in a while. All engines tend to need this from time to time.

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Old 12-03-2013, 02:33 PM   #50
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Also get out and do an Italian tuneup every once in a while. All engines tend to need this from time to time.
+1

Always remember doing this in my old Volvo 740 TD, visible smoke coming out of the exhaust that day, but never after. Ran much better after too.
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Old 12-03-2013, 02:48 PM   #51
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+1

Always remember doing this in my old Volvo 740 TD, visible smoke coming out of the exhaust that day, but never after. Ran much better after too.
Works a treat doesn't it? I usually just go find a long hill and floor it. Need to get the engine working full load at full temp. Engine usually settles down and smooths out nicely afterward. But a diesel will never be as quiet as a petrol engine. My friends used to tell me they could hear me coming because it sounded like pots & pans rolling down the street.
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Old 12-03-2013, 02:53 PM   #52
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Works a treat doesn't it? I usually just go find a long hill and floor it. Need to get the engine working full load at full temp. Engine usually settles down and smooths out nicely afterward. But a diesel will never be as quiet as a petrol engine. My friends used to tell me they could hear me coming because it sounded like pots & pans rolling down the street.
In the UK lots of our cars are Diesel, for example there is a Mondeo that has a 155BHP engine. Does the USA get the big M-Benz 320 Diesels?
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Old 12-03-2013, 03:23 PM   #53
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I have a 1985 300D Turbodiesel and a 2005 E320 CDI. The two could not be more different obviously. I consider the old 300D to be the best car ever made and is my personal favorite of all time. Most faithful car ever, biggest threat you will face is rust. Sadly most of them still in service are Swiss cheese by now. It has a poorly designed climate control system though. Heater works brilliantly but forget about the AC.

The CDI outputs 369 pound-feet of torque and returns 35 mpg on the highway. They made a commercial showing it outrunning a Corvette of the same year in a quarter-mile drag race. It's very quiet but you can still hear a dull faint knocking. Diesels are my favorite, I even like the smell of the exhaust.
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Old 12-03-2013, 06:56 PM   #54
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I have a 1985 300D Turbodiesel and a 2005 E320 CDI. The two could not be more different obviously. I consider the old 300D to be the best car ever made and is my personal favorite of all time. Most faithful car ever, biggest threat you will face is rust. Sadly most of them still in service are Swiss cheese by now. It has a poorly designed climate control system though. Heater works brilliantly but forget about the AC.

The CDI outputs 369 pound-feet of torque and returns 35 mpg on the highway. They made a commercial showing it outrunning a Corvette of the same year in a quarter-mile drag race. It's very quiet but you can still hear a dull faint knocking. Diesels are my favorite, I even like the smell of the exhaust.
I have a 83 240D manual..love the car but getting on the freeway really sucks with 67 HP(at the crank) LOL. Sucks the US didn't get the 330D
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Old 09-04-2014, 05:43 PM   #55
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Very interesting thread gents but what on earth is an Italian tune up??!

Does anyone know for sure that Seafoaming a diesel is ok?


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Old 09-04-2014, 05:52 PM   #56
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Very interesting thread gents but what on earth is an Italian tune up??!

Does anyone know for sure that Seafoaming a diesel is ok?


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Italian tuneup = driving the piss out of the car.
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Old 09-04-2014, 06:28 PM   #57
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Of course , should have known, thanks


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