2008 Dodge Ram 2500 67 Diesel High Miles Review

 6.7 Cummins Diesel Engine Problems

The 6.7 Cummins diesel engine is the latest of the B series engines. It's a straight-half dozen, 24 valve turbodiesel released for Dodge Ram trucks in 2007. The B6.seven Cummins still lives on in Ram 2500 and 3500+ trucks to this day. Though, it'southward been through a few updates over the years. As of 2021, the 6.7 Cummins offers an impressive 400hp and 1000tq. Many likewise associate the Cummins proper name with some of the best low-cal truck diesel engines ever. However, no engine is perfect and the 6.vii Cummins diesel is no exception. In this article, nosotros discuss the most common problems on the Contrivance Ram 6.seven Cummins engine likewise as overall reliability.

5 Common 6.7 Cummins Problems

A few of the most common faults on the ISB 6.seven liter Cummins turbodiesel engine include:

• Clogged DPF
• Turbo failure
• Head gasket
• Fuel dilution
• EGR cooler

Issues with the Cummins 6.7 often come up down to emissions parts. Even so, the turbos and caput gaskets are known to run into occasional failures too. It'southward a proficient time to add a few notes that apply to this article. We're referring to these issues as the about common. That doesn't necessarily mean they affect a huge number of 6.7L Cummins diesel engines. Rather, when problems practice happen these are a few of the most common.

Dodge and Ram trucks have besides been using the half-dozen.7 Cummins since 2007. Certain years may be more than prone to these failures – specifically the earlier model year Dodge and Ram trucks. It's natural for all engines to have a few kinks in their early years. Nonetheless, many of the B6.seven Cummins engines suffer from the above faults. Throughout the rest of this post we'll discuss each of the 5 problems in-depth and end off with overall thoughts on Cummins 6.7L reliability.

1) 6.7 Cummins DPF Clogging

Diesel particulate filter (DPF) bottleneck is a common trouble on the Dodge, Ram 6.7 Cummins. Initially, Chrysler opted to avoid using diesel frazzle fluid (DEF). Without DEF the B6.7 diesel must run a little bit on the richer side to reduce NOx emissions. This in turn leads to more particulates (soot), which can quickly clog the DPF.

These clogging issues were so problematic early that Dodge rolled out multiple PCM re-flashes in an attempt to reduce the occurrence. In 2013, Ram pickup trucks receive SCR emissions command systems along with diesel fuel exhaust fluid. This helps reduce particulates, so DPF bottleneck is less common on the after twelvemonth 6.seven Cummins. Nevertheless, it still affects many trucks – especially as mileage builds up.

Information technology's pretty bad for a turbodiesel engine to run with a highly clogged frazzle DPF. This causes a build-upwardly of back-pressure level for the 6.7 Cummins, which can lead to more heat and stress on the engine. As such, it'south important to ensure your vi.7 Cummins DPF is functioning properly. Some take success in washing out chock-full diesel particulate filters. Others decide to delete the DPF completely.

B6.7 Cummins DPF Chock-full Symptoms

Symptoms that bespeak the Dodge, Ram 6.7 diesel particulate filter is chock-full include:

• Power loss
• Long crank
• Reduced power fashion
• Engine fault codes

1 of the main symptoms y'all may find is ability loss on the vi.7 Cummins with a chock-full DPF. If exhaust gases can't escape efficiently you'll have a build upward in pressure. That causes the vi.seven engine and turbo to run poorly. This is particularly true if you cease upward in low power mode due to the half dozen.vii Cummins DPF clogging. You may also observe long cranks or an engine error lawmaking.

Dodge, Ram 6.7 DPF Replacement

The DPF is an expensive piece of emissions equipment. Even a refurbished six.7 DPF can run due north of $one,000 while original filters are nearly double that. Contrivance and Ram vi.seven Cummins owners have a few options. Aftermarket college functioning diesel particulate filters exist, only those still oft come in over $one,000. Some take success in pressure washing the OEM six.seven DPF. Trying to clean the filter may not work at all, only if it does it's probable to be a shorter-term solution.

Ultimately, this leads some to get the road of completely deleting the half-dozen.7 Cummins DPF with an aftermarket frazzle. This is definitely the easiest on the upkeep and most constructive long-term solution. Notwithstanding, DPF deletes do come with some legal concerns due to emissions.

2) B6.7 Cummins Turbocharger Failure

Turbo problems or failures are more common on earlier model 6.vii Cummins engines. However, it tin can happen on whatever twelvemonth as turbochargers naturally accept a lot of abuse. We titled this section turbo failure, just at that place are a few issues that may non result in complete failure. A few issues that may occur with the half dozen.vii Cummins turbo include:

• Leaking oil seals
• Worn bearings (also much shaft play)
• Sticking VGT parts
• Compressor or turbine wheel damage

As turbos historic period, leaking oil seals and worn bearings are amid the most common issues. B6.seven Cummins turbos run in excess of 100,000 RPM'south. Over time, the half dozen.7 turbo bearings may habiliment down and lead to excessive shaft play. If left lone the turbine or compressor wheel may contact the turbo housing and outcome in complete failure.

Since turbos run off incredibly hot exhaust gases information technology'south important to allow the oil to achieve operating temperatures earlier pushing the Dodge Ram 6.seven Cummins as well hard. Cold oil splashing on hot turbo seals is a recipe for premature turbo seal problems. You should too permit the truck idle for a couple minutes earlier shutting down the engine. This will help cool the turbo.

Turbo bug can popular up at any point, but information technology becomes much more than common north of 120,000 miles. A turbo rebuild may exist possible. However, if your 6.vii Cummins is high mileage on the original turbo information technology may brand sense to replace the entire turbo.

Dodge, Ram half dozen.vii Diesel Turbo Failure Symptoms

Look for the following symptoms that may betoken an issue with the B6.vii turbo:

• Slow spool
• Poor performance
• Excessive smoke from frazzle
• Whining sounds

There are a few other possible symptoms, likewise. A sudden failure will typically issue in desperate amounts of smoke and oil loss. Moderate smoke will too occur when the turbo seals are on their way out. vi.7 Cummins turbos failing over time will generally make whining sounds, spool slowly, and not reach the target heave.

B6.7 Cummins Turbodiesel Turbo Replacement

New OEM turbochargers come in north of $1,000 and often close to double that price. A remanufactured turbo will run around $1,000 to $1,500. Information technology'southward certainly not cheap. Yous can find some high quality half-dozen.7 Cummins turbo upgrades for effectually the same price as OEM, if non fifty-fifty cheaper.

Turbo upgrades are a good route to go – in our opinion. It volition let yous to excerpt a little more performance from your Dodge or Ram truck. However, turbo upgrades are still a good option even if you want OEM performance. A larger, more than efficient turbo will have an easier task and should in theory hold upwardly longer than the OEM turbo.

3) Dodge, Ram 6.7 Cummins Head Gasket Problems

Head gasket problems on the six.7 Cummins may not be as well common in actuality. Notwithstanding, compared to the previous 5.9 Cummins engines the B6.7 runs into the outcome a lot more ofttimes. Part of it may have to exercise with the sheer power and torque the Contrivance Ram vi.7 makes. Loftier cylinder pressures may be to blame for the head gasket failures.

Chances are head gasket failures are somewhat blown out of proportion. In other words, it's likely not as common equally some may propose. It's all the same worth the mention though since head gasket replacement tin exist pretty pricey. When the head fails some opt to upgrade the fire-rings and head studs to help proceed the caput from lifting.

ISB half-dozen.vii Head Gasket Failure Symptoms

Symptoms of a blown B6.seven Cummins head gasket include:

• White'ish smoke with sweet scent
• Oil mixed with coolant
• Coolant mixed with oil
• Overheating

A diddled head gasket will likely allow coolant into the combustion chambers. This will issue in white smoke from the exhaust with a sweet smell from the coolant burning. Additionally, diddled 6.vii Cummins caput gaskets can permit oil and coolant to mix together. Higher pressure in the cooling system can also consequence in rapid overheating and/or coolant pouring out of the tank.

6.7L Cummins Diesel Caput Gasket Replacement

Replacement costs can vary depending upon the year and model of the Dodge or Ram truck in question. Fortunately, there is only one caput gasket thanks to the straight-six design. vi.vii caput gaskets run in the ballpark of $100-200. Labor is where the costs begin to add up, and the repair can come in excess of $1,000 all in. That's likewise assuming yous're non upgrading whatsoever parts.

Some half dozen.7 Cummins owners look to kits like this to avoid any potential issues in the futurity. The kits expensive especially when you add in labor. It's a good idea to go with ISB half dozen.7 Cummins head studs at the least, though.

4) ISB 6.7L Cummins Fuel Dilution Issues

Alright – we'll speed things up a chip moving through these next sections. Some fuel dilution in the oil is natural on the B6.7 diesel engine. It's inherent due to the way the engine manages regeneration. This is the procedure in that particulates are trapped in the DPF and burned for cleaner emissions. The half dozen.7 Cummins does non use a 7th injector to innovate fuel into the exhaust. Rather, the fuel injectors spray some fuel into the exhaust stream during the cylinders exhaust strokes.

This allows minor amounts of fuel to stick to the cylinder wall where fuel can then mix with the oil. Some fuel dilution occurs in almost all diesel engines. Withal, some 6.seven Cummins diesels seem to have too much dilution. Dodge and Ram state the acceptable limit at 5% dilution.

Anything higher can be an issue since too much fuel tin interfere with oils task to properly lubricate and protect the engine. It won't cause whatever immediate and severe damage on the ISB six.7L engine. However, it tin result in premature wear for engine internals.

Dodge, Ram 6.7 Fuel Dilution Symptoms

There aren't usually any immediate symptoms of fuel dilution on the half dozen.7 Cummins. As such, it's a good idea to do an occasional oil analysis. This will help you determine the rate of fuel dilution in your specific B6.seven diesel fuel. You lot can and then come up with an oil change schedule based on that data.

How to Avoid Cummins 6.7L Fuel Dilution

A few ways to help prevent too much fuel dilution on the B6.7 Cummins include:

• Permit engine to warm upward
• Avoid extended idling

Allow the engine to warm up before driving under heavy engine loads, such as towing heavy weights. The fuel is less likely to stick to the cylinder walls on a warmer engine. Additionally, avoid idling the engine for extended periods of fourth dimension. This somewhat ties into point i. If the Cummins 6.7L diesel is left to idle too long the cylinder temperatures drop. This volition increment the corporeality of fuel sticking to cylinder walls.

5) 6.7 Cummins EGR Cooler Problems

EGR problems are a problem among many modern diesel trucks. The B6.7 Cummins is no exception here. It's truthful most mod diesels primarily take issues with a lot of the emissions related equipment. As such, long-term diesel owners are likely well aware of these bug. We'll continue this pretty short.

The EGR valve and cooler on the 6.vii Cummins is known to have problems, peculiarly with higher mileage. It's mutual for owners to simply delete the EGR system when problems do pop up. Of grade, EGR delete can have legal concerns due to emissions laws.

Sometimes cleaning the EGR valve will aid alleviate issues. Though, it's usually a good idea to replace or delete the parts – especially if your Dodge or Ram 6.vii is higher mileage.

Dodge, Ram half-dozen.7 Cummins Reliability

Is the Dodge and Ram 6.vii Cummins engine reliable? Yep and no. The B6.7 diesel certainly doesn't have the aforementioned reputation as some of the older diesels similar the 5.ix Cummins or 7.three Power Stroke. Withal, many mod diesel engines are in the same gunkhole as the 6.vii Cummins. A lot of the emissions related technology can really kill these diesels. DPF and EGR bug are a few of the emissions parts that can cause headaches on the 6.7 Cummins engine.

That said, the vi.7 Cummins is a fairly reliable engine overall. This is particularly true if you lot opt to delete some of the emissions equipment similar the DPF and EGR systems. Beware of potential emissions or legal implications, though.

Otherwise, maintain your B6.7 Cummins well and it will likely reward you with a solid, reliable feel. It's a good idea to perform the occasional oil analysis to ostend fuel dilution. Piece of work out an oil change schedule based on the results. Keep up with other bones maintenance and stay on top of repairs every bit half-dozen.7 Cummins failures occur.

Once more, the 6.7 Cummins may not have the aforementioned legendary reputation as some of the older diesel engines. When well maintained the ISB 6.7L should withal agree upwards well across 250,000 miles. Nosotros'll consider that pretty respectable longevity.

half-dozen.7 Cummins Common Problems Summary

The Dodge, Ram ISB half dozen.7L Cummins is an impressive diesel fuel engine. Information technology was the first lite duty truck to break into the 1,000 torque territory with the vi.7 Power Stroke following soon afterwards. In that location's no question the 6.seven diesel provides enough of power and torque for almost any possessor. However, no engine is perfect and this applies to the Cummins six.seven.

It's mostly emissions equipment that brings the engine down a fiddling bit. EGR and DPF problems are mutual on the 6.seven Cummins – every bit well equally many other mod diesels. The sheer torque of the 6.7L engine can also cause issues with the caput gaskets declining. Otherwise, turbo bug are possible with higher mileage as they have a lot of abuse. Fuel dilution is also another surface area that can exist an issue, but the occasional oil analysis will help mitigate the risks of dilution of the oil.

Dodge and Ram trucks with the 6.vii Cummins engine are pretty reliable, overall. Certain, information technology doesn't take the same legendary reputation equally older diesels similar the 7.3 PS or 5.9 Cummins. Unfortunately, the emissions parts of the mod mean solar day work against reliability in many ways. Nevertheless, maintain the 6.seven Cummins well and it shouldn't have any problems eclipsing 250,000 miles.

What'due south your experience with the 6.7L Cummins straight-six?

Drop a comment & let us know!

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Source: https://dieseliq.com/the-5-most-common-isb-6-7-cummins-engine-problems/

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