How long the oil filter housing job takes on a 2019 Ram Classic 1500 with 3.6L
The oil filter housing replacement on a 2019 Ram Classic 1500 with the 3.6L V6 engine typically takes 1.5 to 2.5 hours at a shop, depending on whether the technician is also replacing the filter or just servicing the housing itself. If you are doing this work yourself and have basic mechanical experience, plan for 2 to 3 hours. The variation comes down to how much of the engine bay you need to access and whether you are replacing just the filter element inside the housing or the entire housing unit.
The 3.6L engine in this truck sits in a way that makes the filter housing moderately accessible — it is not tucked behind the engine like some designs, but it is not sitting on top either. You will need to remove the plastic undertray or belly pan to reach it comfortably, and depending on your truck's configuration, you may need to move or disconnect a hose or two. A shop will have the right lift and tools to work around these obstacles quickly. At home, you are working around the geometry of your own driveway or garage.
Key Takeaways
- Book time for the 2019 Ram Classic 1500 3.6L oil filter housing job is 1.5 to 2.5 hours at a professional shop.
- The housing sits below the engine and requires removal of the plastic undertray to access, which adds time to the job.
- If you are doing this work yourself, add 30 minutes to an hour to the shop time because you lack the lift and specialized tools.
- The actual filter element swap takes 15 to 20 minutes once you have the housing exposed; the rest of the time is access and reassembly.
What "book time" means and why it matters
Book time is the labor duration that a repair shop's computer system shows for a specific job on a specific vehicle. It is not a may provide of how long your truck will actually sit in the bay — it is the baseline that shops use to quote you a labor charge and to schedule their technicians. A shop might tell you "book time is 2 hours," which means they will charge you for 2 hours of labor whether the job takes 1.5 hours or 2.5 hours.
For the 2019 Ram Classic 1500 3.6L, the book time you will see quoted comes from Chrysler's official service manual or from industry standard databases like Mitchell or AllData. These numbers are based on a technician who knows the truck, has the right tools, and is working on a vehicle in good condition with no rust or seized bolts. Your actual time may differ if your truck has been sitting, if fasteners are corroded, or if the technician is less familiar with this particular engine layout.
Why the 3.6L engine's filter housing takes longer than some alternatives
The 3.6L V6 in the 2019 Ram Classic sits longitudinally (front to back) in the engine bay, and the filter housing is mounted on the driver's side of the engine block, below the cylinder head. This position means a technician cannot straightforward reach down from above — they have to get underneath or work from the side at an angle. On some trucks, the filter housing sits on top of the engine where you can access it in seconds. On others, it is buried so deep that the entire engine nearly has to come out.
The 3.6L falls in the middle: accessible, but not convenient. The plastic undertray that protects the undercarriage has to come off, which involves removing 8 to 12 fasteners. Once that is gone, the housing is visible, but you are working in a confined space with limited clearance. A socket and ratchet work fine, but your hands and arms are in tight quarters. This is why a shop with a lift can do the job faster than someone working in a driveway — the truck is at eye level, and the technician can move around it freely.
Breaking down the time: access, removal, and reassembly
The 1.5 to 2.5 hour book time breaks down roughly like this: 20 to 30 minutes to remove the undertray and any hoses or brackets in the way, 15 to 20 minutes to unbolt the housing and drain the old oil, 10 to 15 minutes to replace the filter element or the housing itself, and 15 to 20 minutes to reinstall everything and top off the oil. The remaining time is spent double-checking work, cleaning up, and running a quick test to make sure there are no leaks.
If you are having only the filter element replaced (not the entire housing), the job sits at the shorter end of that range — closer to 1.5 hours. If the housing itself is cracked or leaking and needs to be replaced as a complete unit, add 20 to 30 minutes because the technician has to transfer the thermostat housing or other components from the old housing to the new one, depending on the design. Always ask your shop whether they are replacing just the filter or the whole housing, because the price and time will be different.
What affects how long the job actually takes
Several real-world factors can push the time up or down from the book estimate. If your truck has high mileage and the undertray fasteners are rusted or stripped, removing it takes longer. If the old filter housing is leaking and has been for a while, oil buildup around the bolts can make them harder to turn. If your truck has never had this service done before, there may be sludge or debris inside the housing that needs to be cleaned out before the new filter goes in.
On the other hand, if your truck is well-maintained and the previous owner kept up with oil changes, the job moves faster. The fasteners turn easily, the housing comes off cleanly, and the new filter seats without fuss. A technician who has done this job on dozens of 3.6L Rams will also work faster than someone doing it for the first time, even if they are equally skilled. This is why some shops quote you exactly 1.5 hours and others quote 2.5 — they are accounting for their own experience and the condition they expect to find.
Doing the job yourself: tools and realistic timing
If you have basic mechanical skills and a safe way to get under the truck (jack stands or a lift, never just a jack), you can do this job yourself. You will need a socket set, a wrench for the housing bolts, an oil filter wrench or strap wrench, a drain pan, and a torque wrench if you want to do it right. The housing bolts on the 3.6L are typically 18 to 22 foot-pounds — not huge, but worth getting correct so you do not strip the threads or leave it loose.
Plan for 2 to 3 hours if this is your first time, and 1.5 to 2 hours if you have done it before. You will spend more time than a shop because you are working around your own equipment and learning the truck's geometry as you go. You will also spend time looking up the exact bolt torque, making sure you have the right filter, and cleaning up afterward. The upside is that you know exactly what was done and you save the labor cost — typically $150 to $250 at most shops, depending on your region.
When to expect the job to be done at a shop
If you drop your truck off for an oil filter housing service and the shop quotes you 2 hours of book time, ask them when they expect to have it ready. Most shops will tell you it will be done the same day, usually within 3 to 4 hours of drop-off, because they can fit it into a technician's schedule between other jobs. If the shop is very busy, it might take longer. If they discover something else that needs attention — a leaking valve cover gasket, a cracked hose, a stuck bolt — they will call you before proceeding, and the total time will increase.
Always confirm whether the quote includes a test drive or a leak check after the work is done. A thorough shop will run the engine and let it idle for a few minutes to make sure the new housing is not leaking and the oil pressure is normal. This adds 10 to 15 minutes but is worth the peace of mind. If the shop does not mention it, ask them to do it before you pick up the truck.
Frequently Asked Questions
Is book time the same as how long my truck will actually be in the shop?
Not necessarily. Book time is the labor duration the shop charges you for, but your truck might be done faster or slower depending on the technician's speed, the truck's condition, and the shop's schedule. A shop might have your truck done in 1.5 hours but still charge you for the full 2-hour book time. Ask the shop for an estimated completion time when you drop it off.
Why does the 3.6L take longer than the 5.7L V8 in other Ram trucks?
The 5.7L V8 in some Ram models has the filter housing mounted higher and more accessible, so it takes less time to reach. The 3.6L's lower mounting position requires more disassembly of the undertray and surrounding components. Different engine designs mean different access times, even on the same truck model.
Can I just replace the filter element, or do I have to replace the whole housing?
You can replace just the filter element if the housing itself is not cracked, leaking, or damaged. This is the standard service and takes the shorter end of the time range. If the housing is leaking or damaged, it has to be replaced as a unit, which adds time and cost. Your shop will inspect it and let you know which is needed.
What if the shop finds rust or stuck bolts during the job?
If fasteners are seized or corroded, the shop will need extra time to work them loose carefully without breaking them. They should call you before proceeding and give you an updated time estimate. This can add 30 minutes to an hour to the job. Penetrating oil and patience are the solution, not force.
Do I need to bring my truck back for anything after the oil filter housing is replaced?
No, this is a one-time service. Once the new filter or housing is installed and the oil is topped off, the job is complete. You do not need a follow-up visit unless the shop finds another issue during the work and you decide to have it fixed.