12 Valve vs. 24 Valve
02-05-2012, 10:11 PM
#16
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I agree with all of you..definately less parts to go wrong. The main thing that our instructor wants us to look at is the valve train and set up for all 12 and 24 valve engines. However, I figured I would conduct my research on Cummins engines.
02-10-2012, 06:40 AM
#17
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Well ladies and gentlemen, I have come to a complicated conclusion on our 12 valves and the newer counterpart, the 24 valve. Our 12 valves are the legendary symbol of reliability and mechanical genious. The 12 valve's design in some respects allows relatively the same amount of air flow if not better within the head through turbulence and valve lift. The 12 valves have a greater valve lift than that of it's counterpart. However, the design of the 24 valve is based on making it more emission friendly. Also in favor of the 24 valve is the new technology we have today. Most modern inline 6 diesel engines are based upon a 24 valve head design. This comes as a result of the electronics age and the great minds of today's engineers that are able to make the electronic components work together with each other. So, each one has their advantages and downfalls, but the downfalls of the 12 valve outweigh that of the 24 valve. My final conlcusion is that we will have to wait for the testament of time. 12 valve diesels that are 30 or more years older are still running strong with the demands of todays equipment. We will see what the 24 valves are like in another 30 years too. But I can gaurantee one thing, the 12 valves will still be running strong along side them.
02-10-2012, 04:01 PM
#18
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Well ladies and gentlemen, I have come to a complicated conclusion on our 12 valves and the newer counterpart, the 24 valve. Our 12 valves are the legendary symbol of reliability and mechanical genious. The 12 valve's design in some respects allows relatively the same amount of air flow if not better within the head through turbulence and valve lift. The 12 valves have a greater valve lift than that of it's counterpart. However, the design of the 24 valve is based on making it more emission friendly. Also in favor of the 24 valve is the new technology we have today. Most modern inline 6 diesel engines are based upon a 24 valve head design. This comes as a result of the electronics age and the great minds of today's engineers that are able to make the electronic components work together with each other. So, each one has their advantages and downfalls, but the downfalls of the 12 valve outweigh that of the 24 valve. My final conlcusion is that we will have to wait for the testament of time. 12 valve diesels that are 30 or more years older are still running strong with the demands of todays equipment. We will see what the 24 valves are like in another 30 years too. But I can gaurantee one thing, the 12 valves will still be running strong along side them.
02-10-2012, 05:05 PM
#20
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Well ladies and gentlemen, I have come to a complicated conclusion on our 12 valves and the newer counterpart, the 24 valve. Our 12 valves are the legendary symbol of reliability and mechanical genious. The 12 valve's design in some respects allows relatively the same amount of air flow if not better within the head through turbulence and valve lift. The 12 valves have a greater valve lift than that of it's counterpart. However, the design of the 24 valve is based on making it more emission friendly. Also in favor of the 24 valve is the new technology we have today. Most modern inline 6 diesel engines are based upon a 24 valve head design. This comes as a result of the electronics age and the great minds of today's engineers that are able to make the electronic components work together with each other. So, each one has their advantages and downfalls, but the downfalls of the 12 valve outweigh that of the 24 valve. My final conlcusion is that we will have to wait for the testament of time. 12 valve diesels that are 30 or more years older are still running strong with the demands of todays equipment. We will see what the 24 valves are like in another 30 years too. But I can gaurantee one thing, the 12 valves will still be running strong along side them.
Good post smooth89!
I agree with you 100%!I for one am NOT a big fan of these new 2012 4th Gen Cummins 6.7 Emissions Engines! No way our older Dodge CTD 12 valve trucks had the multitude of problems these new 6.7's do!
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John_P
02-10-2012, 09:46 PM
#21
Registered User
Is the 24 valve common rail a multi squirt design, like the powersmoke?
It would be real interesting if one could combine the breathing of a 24 valve with the simplicity of distributor or inline injection.
It would be real interesting if one could combine the breathing of a 24 valve with the simplicity of distributor or inline injection.
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bushwacker (02-09-2024)
02-11-2012, 05:51 PM
#26
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smooth89:
In the area I live in here are just a few of the issues our Dodge Dealers are seeing:
1.) All kinds of CHECK ENGINE LIGHTS and trouble codes.
2.) Fuel Dilution Issues
3.) Plugged EGR Systems from Heavy Soot
4.) Plugged Intake Manifolds From Heavy Soot
5.) Plugged Turbos From Heavy Soot
6.) Broken Turbo Shafts From Heavy Soot
7.) Bad or Broken Injectors
As DTR Member houndog said, go over to the 4th Gen Section and read some of the threads there. It will make you appreciate our old Cummins 5.9 12 valve engines.
Here is a thread on a turbo failure for you:
https://www.dieseltruckresource.com/...d.php?t=299556
Look at the 6.7 intake manifold in this thread:
https://www.dieseltruckresource.com/...s-t300348.html
02-11-2012, 08:03 PM
#27
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After I bought all the 6.7 parts i was a bit upset that I couldn't find one single shop that would wire it up and make it run in the 1st gen. They did me a favor in the long run and I look forward to running it with the p-pump instead. That should fix the electrical and fueling problems and the new rods and girdle should fix the other issue.
02-11-2012, 11:12 PM
#28
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Thread Starter
hmmmm...thats interesting....and I did take a quick glance at some of the thread titles....all I can say is "unfortunate". And I can reassure you that I don't need to see the problems others are having with their trucks to appreciate my first gen....it goes beyond just that.
02-12-2012, 08:03 AM
#30
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hmmmm...thats interesting....and I did take a quick glance at some of the thread titles....all I can say is "unfortunate". And I can reassure you that I don't need to see the problems others are having with their trucks to appreciate my first gen....it goes beyond just that.
Sorry to bother with you with those links smooth89!
I only posted them because you had asked "What problems are they having?"