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  #1  
Old 12-03-2019, 09:55 PM
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Question Ford Noisy Engine

Even my question not be about Mercedes Benz, I am curious to know why from different car manufacturers their diesel engines has different level of noise.
I have noticed that Ford F250 engines are louder than any other truck diesel.
I know many other truck diesel with almost same size engine but none of them has the engine so loud as Ford F250.
Can someone explain to me why those F250's are so noisy?
Thanks.

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  #2  
Old 12-03-2019, 11:19 PM
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Quote:
Originally Posted by nyko46 View Post
Even my question not be about Mercedes Benz, I am curious to know why from different car manufacturers their diesel engines has different level of noise.
I have noticed that Ford F250 engines are louder than any other truck diesel.
I know many other truck diesel with almost same size engine but none of them has the engine so loud as Ford F250.
Can someone explain to me why those F250's are so noisy?
Thanks.
Evidently you have not ever heard a Dodge with the Cummins engine! They are by far the loudest Diesel engine of the Big Three.
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  #3  
Old 12-03-2019, 11:38 PM
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It is difficult to sell a vacuum carpet cleaner that does not make a lot of noise --- it doesn't sound like it is working. Noise equates to power for some people. The machine that makes the most noise sounds like it is the best.
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Old 12-04-2019, 01:18 AM
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Dodges are not that loud tbh. The Cummins is rather quite.

The old 7.3 DI diesel is LOUD as hell.
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Old 12-04-2019, 02:27 AM
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Post Noisy Machines

My old Kirby vacuum cleaner is like having a 707 jet running but it sucks like no other before or since, I'll keep it .
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Old 12-04-2019, 10:54 AM
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Some cummins are more noisy than others. It has a lot to do with the muffs.
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  #7  
Old 12-04-2019, 12:38 PM
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Quote:
Originally Posted by t walgamuth View Post
Some cummins are more noisy than others. It has a lot to do with the muffs.
Yes, the older ones are way loud. Most all the newer engines (from the Big Three) that are common rail and/or direct injected are much quieter.

Last edited by ROLLGUY; 12-04-2019 at 01:22 PM.
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Old 12-04-2019, 01:07 PM
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Isnít the noise of a diesel mostly determined by the injection pump ?
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  #9  
Old 12-04-2019, 01:41 PM
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A lot of the newer diesels are downright quiet. Pilot injection and a smooth pressure increase vs. just a big chunk of fuel all at once and a pressure spike makes a huge difference. My girlfriend's '13 TDI Beetle, while definitely not a gasser, is no louder than a gasser with the windows up.

My 617 is noisy noisy, almost Cummins like jarring. None of the other 617's I've heard sound like that. Timing is perfect and it runs well otherwise, so I don't worry. I do wonder, though.

Edit: If anyone's in Oregon with a normal running 617 and would be willing to meet up and compare notes, I'll buy lunch or coffee or whatever.
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Old 12-04-2019, 03:57 PM
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The PowerStroke diesels use a hydraulic HEUI injector setup that runs off oil pressure to fire the injector. Each injector has a spool valve in it and is electronically controlled. The early 7.3's had a single-shot injector. They were LOUD due to the diesel knock of each injection event. Later 7.3's had multi-shot injectors and were a bit quieter, but still pretty agricultural. The 6.0's improved the multi-shot setup and the 6.4's got it to the point that they were very quiet (but one of the worst engines Ford/Navistar ever made). The current 6.7's are extremely quiet in their stock form due to the multi-shot injection and common-rail setup.

Our old IDI diesels aren't exactly silent, but when well tuned they're remarkably quiet. My 3.4L "rod bender" is so quiet when idling that the loudest part in the engine bay is the "clack" of the delivery valves or the cooling fans if the A/C is on.
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  #11  
Old 12-04-2019, 04:31 PM
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International 7.3 is loud?

Im believing that the person has not heard a 5.9 litre cummins diesel even at idle.. - It has the most bassy firing knocks that are heard from afar.
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Old 12-04-2019, 05:22 PM
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There is a difference in clatter between direct injection engines (OM617 for example) and common rail injection systems which are notably quieter.

In addition, a lot of the clatter in the OM617 originates in the vacuum pump. Both older diaphragm and later piston types are noisy.
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Old 12-04-2019, 09:24 PM
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OM617 is a prechamber engine. Direct injection is usually louder.
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  #14  
Old 12-04-2019, 09:58 PM
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Quote:
Originally Posted by Zulfiqar View Post
International 7.3 is loud?

Im believing that the person has not heard a 5.9 litre cummins diesel even at idle.. - It has the most bassy firing knocks that are heard from afar.
Exactly what I said in post #2
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  #15  
Old 12-05-2019, 10:27 AM
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Question

There are a lot of guys in this post talking about "noisy engines" but none of them, except "diseasel300",explaning the reason why the engines are loud.
Can other guys try to explain WHY that engine is noisy?
Why mean for what reason the engine is louder than other diesel engines.
Thanks

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