6.7 Cummins Rear Main Seal Replacement Cost

The cost of replacing the rear main seal on a 6.7 Cummins engine can vary drastically depending on factors such as labor costs, parts needed, and where you take your vehicle to get serviced. On average, the replacement cost for this repair should be somewhere between $400 and $800. This range includes the parts necessary to complete the job, including basic seals and gaskets along with any additional components that may need to be replaced due to age or wear-and-tear related issues.

Labor costs will depend heavily on how long it takes a technician completes the task – typically around two hours – as well as their experience level in performing similar repairs.

The replacement cost for a 6.7 Cummins rear main seal can vary depending on the year, make and model of your vehicle, as well as the type of seal being replaced. Generally speaking, you’re looking at spending anywhere from $100 to $400 for parts and labor. If you’re doing it yourself, then the cost is only for parts which usually range from around $50 to over $200 depending on what type of seal you decide to get.

You need to do this!!! 5.9L and 6.7L Cummins Rear Main Seal Replacement

How Many Hours Does It Take to Replace a Rear Main Seal?

Replacing a rear main seal is an important and time-consuming task that should not be taken lightly. On average, it takes around 6 to 8 hours for most mechanics to replace the seal correctly. The actual replacement process itself only takes about 2 hours, but other tasks like removing parts of the engine block can add quite a bit more time to the job.

It’s also worth noting that different vehicles may take slightly longer or shorter depending on their particular make and model. For example, some engines require complete removal in order to access the rear main seal while others are designed so that only certain sections need to be dismantled first. In any case, it’s best practice for those who plan on attempting this repair themselves have all necessary tools and supplies ready beforehand as well as plenty of patience!

How Serious is a Rear Main Seal Leak?

A rear main seal leak is a serious issue that should not be taken lightly. It’s a common problem in older vehicles, and if it’s left unchecked, it can cause massive amounts of damage to the engine. The rear main seal is responsible for preventing oil from leaking out of the crankcase and into other parts of the engine.

If the seal fails or starts to wear down, oil will start to seep through and spread throughout your vehicle. This can lead to major issues such as corrosion on your internal components, decreased performance, overheating problems, and even complete engine failure over time. In addition, since this particular part is located at the back end of your car’s crankshaft assembly (or “main”), replacing it requires taking apart most of your car—which means costly labor charges along with parts costs in order for you to effectively repair this issue.

All in all, if you suspect that you have a rear main seal leak then make sure that you get it checked out by a qualified mechanic immediately; otherwise you may find yourself spending far more money than what would have been necessary had you addressed it promptly!

Why is Rear Main Seal So Expensive?

The rear main seal is a critical component of any vehicle’s engine, and one that many drivers tend to overlook when it comes to maintenance. This small seal sits between the crankshaft and the transmission, helping keep oil where it needs to be while preventing leaks from occurring. Unfortunately, due to its location in the engine and importance for proper functioning, replacing a rear main seal can be an expensive job – but why?

For starters, getting access to the rear main seal requires taking apart several parts of your car’s engine. In some cases this means having to take off multiple components such as timing belts or other coverings before you can even get close enough to inspect the worn-out part. Additionally, because of how important this piece is for ensuring your engine runs smoothly over time (as well as keeping oil from leaking out) it is essential that you use only OEM quality parts during replacement – meaning higher costs than generic replacements.

And finally, if something does go wrong with your installation then entire sections of your car may need dismantling again in order for mechanics or yourself (depending on who did the repair) could fix it – leading potentially additional charges when getting repairs done at shops or garages which might add up quickly! It’s no wonder why people often opt not replace their rear main seals until they absolutely have too: unfortunately sometimes paying upfront now will help save money in potential repairs down the line!

How Much Does the Average Rear Main Seal Cost?

The cost of a rear main seal varies widely, depending on the make and model of your vehicle. On average, you can expect to pay anywhere from $100 to upwards of $450 for a new rear main seal. The cost also depends on where you get it done; some shops may charge more than others, so be sure to shop around before making a final purchase.

Additionally, labor costs will vary based on the complexity of the job and whether or not any other repairs need to be made in order for the new seal to be properly installed. If you’re looking for an even better deal, consider purchasing a used or aftermarket part from an online retailer or auto parts store instead—you could potentially save quite a bit compared with buying one brand-new from your local dealer.

6.7 Cummins Rear Main Seal Replacement Cost

Credit: www.dieseltruckresource.com

5.9 Cummins Rear Main Seal Tool

The 5.9 Cummins Rear Main Seal Tool is a specialized tool designed for replacing the rear main seal on 5.9 liter Cummins diesel engines, found in Dodge Ram pickups from 2003 to 2007. This tool makes it easy and efficient to replace the old seal with a new one, saving time and money on costly repairs that can result from an improperly sealed engine. The kit includes all necessary parts needed for installation, as well as detailed instructions to ensure proper use of the tool.

Gmc Terrain Rear Main Seal Replacement Cost

The cost of replacing the rear main seal on a GMC Terrain can range from $600 to over $1,200 depending on the model year and labor rates at your local repair shop. The replacement involves removing several components including the oil pan, crankshaft pulley, and flywheel in order to get access to the seal. So be sure to have a professional perform this job for you as it can be quite involved!

Cummins Rear Main Seal Install

The installation of a Cummins rear main seal is an important maintenance task for any diesel engine. It requires the removal of the crankshaft pulley, flywheel or flex plate, and oil pan so that the old seal can be removed and replaced with a new one. Once this is done, it’s essential to use special gaskets and seals when reassembling everything in order to ensure proper sealing and prevent future leaks.

A professional mechanic may be needed depending on your skill level; however, with patience and care anyone can complete this job successfully!


In conclusion, replacing the rear main seal on a 6.7 Cummins engine is an expensive repair that can cost anywhere from $1,200 to $3,000 depending on the type of vehicle and labor costs in your area. However, it is important to have this repair done in order to prevent further damage and keep your vehicle running smoothly. If you choose to do the job yourself or have a mechanic complete it for you, be sure to use OEM parts for best results.


  • Zayn

    John Zayn Smith is a renowned truck enthusiast, automotive industry expert, and author. Beginning his career as a mechanic, Zayn's curiosity led him to explore all facets of the trucking world, sharing his insights through in-depth articles on TruckGuider.com. His knowledge spans truck mechanics, trends, and aftermarket modifications, making him a trusted resource for both professionals and hobbyists. Outside writing and mechanics, Zayn enjoys off-roading, truck shows, and family time. Follow his work for the latest in truck-related news and tips.

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