truck advice

[houstonscott]

RMS failure is an engine failure.

 

[TMGT]

Please explain then because I couldn't find anything on the Google machine

 

[houstonscott]

Please explain then because I couldn't find anything on the Google machine

I can't teach you how to use a computer search engine. Google up reasons for a rear main seal failure.

 

[houstonscott]

This really disturbs me. I thought my Cummins had served me well for 14 years and 225,000 miles. Now I find out it's a ticking time bomb. I may not sleep tonight!:laughing:

I'll bet it's leaked into the transmission bell house and you don't even know. I'll bet it drips too. It's a design flaw in the engine. Two main reasons a RMS will fail, failed bearing on crankshaft, warped crank.

 

[houstonscott]

Please explain then because I couldn't find anything on the Google machine

you google up rear main seal failure on Dodge Ram diesels you'll find thousands. Go to a Dodge Ram forum and search. It's not a class action law suit yet, but it's close. Dealer are instructed that if it doesn't drip to ground not to honor warranty repairs. Good luck with that...

 

[TMGT]

I searched what you said to, "cummins rms problems", "cummins rear main seal problem" and and many variations of them but wasn't met with any real results.

If your going to make a one liner claim then I would think you'd be able to substantiate the claim or at least provide sources.

 

[houstonscott]

I searched what you said to, "cummins rms problems", "cummins rear main seal problem" and and many variations of them but wasn't met with any real results. If your going to make a one liner claim then I would think you'd be able to substantiate the claim or at least provide sources.

Rear Main Seal Leak??? - Dodge Diesel - Diesel Truck Resource Forums It took three seconds to get a 1000 hits.

You'll find those cranks are cast (cheaper) rather than forged. You can keep changing seal, but the engine is flawed. Makes no difference to me what you buy, or how you defend it, it's my recommendation that those engines are junk, and steer clear unless you want RMS leaks or failures.

 

[TMGT]

Ok, I saw that. It shows that people had rear main seal leaks, not an inherent flaw with the engine.
Out of curiosity I also googled powerstroke and duramax since I assume we are are refering to smaller truck diesels and got a just as many hits.

I've worked on a lot of different diesel engines including cummins including OTR and industrial and haven't seen any problems or patterns, that's why I'm trying to figure out your sources since the issue wasn't clear from your initial claim.

 

[dodge man]

To me its a flaw if its leaking so bad you have to start adding a lot of oil in between oil changes, say 2 quarts or more. I've been around a lot of engines, including a Cummins, and I've seen a lot of gaskets, seals and what not leak. I had a 70 Challenger with a 383 rear main seal that was a rope seal, probably the factory original, that leaked. Didn't mean the engine was junk. I've NEVER heard of a design flaw on the Cummins rear manin seal until this thread. Must be a problem on the newer 6.7 engines because I never heard of it on the 5.9's.

 

[houstonscott]

Ok, I saw that. It shows that people had rear main seal leaks, not an inherent flaw with the engine. Out of curiosity I also googled powerstroke and duramax since I assume we are are refering to smaller truck diesels and got a just as many hits. I've worked on a lot of different diesel engines including cummins including OTR and industrial and haven't seen any problems or patterns, that's why I'm trying to figure out your sources since the issue wasn't clear from your initial claim.

My research, obviously better than yours, I came to conclusion that you chance of a RMS on a diesel ram was very very high. Read up on why a RMS fails, it most certainly is the engine. Crank or bearings. Wobble is what makes it fail.

 

[houstonscott]

To me its a flaw if its leaking so bad you have to start adding a lot of oil in between oil changes, say 2 quarts or more. I've been around a lot of engines, including a Cummins, and I've seen a lot of gaskets, seals and what not leak. I had a 70 Challenger with a 383 rear main seal that was a rope seal, probably the factory original, that leaked. Didn't mean the engine was junk. I've NEVER heard of a design flaw on the Cummins rear manin seal until this thread. Must be a problem on the newer 6.7 engines because I never heard of it on the 5.9's.

Question the shop manager at your dealer. It's so commonplace they have a criteria to deal it... I brought it your attention so you might make a better informed choice when buying a new truck. Now you know. Make your own choice.

 

[TMGT]

Rear Main Seal Leak??? - Dodge Diesel - Diesel Truck Resource Forums It took three seconds to get a 1000 hits.

You'll find those cranks are cast (cheaper) rather than forged. You can keep changing seal, but the engine is flawed. Makes no difference to me what you buy, or how you defend it, it's my recommendation that those engines are junk, and steer clear unless you want RMS leaks or failures.

I'm not sure where your getting your information but it's wrong, the stock crank in the 5.9 and 6.7 is forged.

I don't feel the need to defend cummins, just want to make sure inaccurate infomation isn't being spread, there's enough of that on the Internet.

 

[TMGT]

Question the shop manager at your dealer. It's so commonplace they have a criteria to deal it... I brought it your attention so you might make a better informed choice when buying a new truck. Now you know. Make your own choice.

I still have alot of friends in the industry, including at cummins and Chrysler, this is news to them also.

I think you're the victim of bad information, otherwise this is heading into troll territory.

 

[TMGT]

To the OP, sorry this thread has gotten a bit off topic.

How goes the truck search?

 

[houstonscott]

I still have alot of friends in the industry, including at cummins and Chrysler, this is news to them also. I think you're the victim of bad information, otherwise this is heading into troll territory.

Why New Ecodiesel Owners Need To Beware Of Engine Failure

The new diesel.

 

[oliver1555]

I'll bet it's leaked into the transmission bell house and you don't even know. I'll bet it drips too. It's a design flaw in the engine. Two main reasons a RMS will fail, failed bearing on crankshaft, warped crank.

When I replaced the clutch at 150,000 miles, the seal was doing its job and the bell housing was as clean as could be expected with that kind of mileage. I did replace the seal, as that is the way I was taught. No drips to date. We used Dodges extensively in the oil patch and they worked very hard for a living. Never had a problem with rear main seals. Some peoples' problems are self inflicted...

 

[houstonscott]

I still have alot of friends in the industry, including at cummins and Chrysler, this is news to them also. I think you're the victim of bad information, otherwise this is heading into troll territory.

http://www.ramforum.com/f44/2015_ram_3500_cummins_6_7_issues-65721/

It's all over net.... I'm not bashing, I'm recommending you fully understand what your buying.

 

[TMGT]

Why New Ecodiesel Owners Need To Beware Of Engine Failure

The new diesel.

What does that article have to do with Cummins?
The 3.0 eco diesel is a vm motori, a different engine manufacturer.

 

[houstonscott]

When I replaced the clutch at 150,000 miles, the seal was doing its job and the bell housing was as clean as could be expected with that kind of mileage. I did replace the seal, as that is the way I was taught. No drips to date. We used Dodges extensively in the oil patch and they worked very hard for a living. Never had a problem with rear main seals. Some peoples' problems are self inflicted...

So you replaced RMS before it leaked? Smart guy.

 

[oliver1555]

So you replaced RMS before it leaked? Smart guy.

Would you have put a clutch in without changing the seal? We all know you don't like Cummins, or cummings. Millions of us have used them in pickups, trucks, tractors, and other equipment with excellent service. To each his own.