Introduction
If you’ve been quoted a repair bill that made your eyes water, or you’re standing in the garage wondering whether to tackle this yourself, understanding the 2019 Ram Classic 1500 3.6 oil filter housing book time is the first step toward making a smart, informed decision. The 3.6-liter Pentastar V6 is a workhorse engine — reliable, smooth, and found in millions of Chrysler, Dodge, Jeep, and Ram vehicles — but it does have one well-documented weak point: that plastic oil filter housing assembly. When it starts leaking, you’re looking at a repair that’s more involved than most people expect. This guide breaks down the actual flat-rate book time, what the job entails, what parts to use, and how to avoid the costly mistakes that turn a straightforward repair into a nightmare.
What “Book Time” Actually Means — And Why It Matters to You
Before getting into the specific numbers, it helps to understand what book time actually is. When a shop quotes you a labor charge, they’re not billing you for the hours a technician physically spent under the hood. They’re billing based on “book time” — also called flat-rate time — which is the standardized labor time published by sources like Mitchell, AllData, or the manufacturer. A job rated at 3.0 book hours will cost you 3.0 hours of labor regardless of whether the technician finished it in two hours or four.
This system matters to you as a vehicle owner because it determines your out-of-pocket cost before a single wrench is turned. Knowing the book time lets you verify whether a shop’s quote is fair, negotiate with confidence, or decide whether doing the job yourself is worth the effort.
The 2019 Ram Classic 1500 3.6 Oil Filter Housing Book Time: The Direct Answer
For the 2019 Ram Classic 1500 equipped with the 3.6L Pentastar V6 (engine codes ERB or ERG), the flat-rate book time for replacing the oil filter housing assembly typically falls between 3.0 and 3.5 hours. Some shop labor guides list it as low as 2.8 hours for experienced technicians working on a fully warmed-up vehicle with no corroded fasteners, while others account for the additional steps involved and list it closer to 3.5 hours.
Why such a range? Because this is not a simple spin-on-and-done job. The oil filter housing on the 3.6 Pentastar sits in a position that requires removing the intake manifold to access it properly. That’s an extra layer of disassembly and reassembly that adds meaningful time to the clock. At a shop labor rate of $100 to $150 per hour — which is average across the United States — you’re looking at $280 to $525 in labor alone before parts are factored in.
For a DIY approach, expect to spend two to four hours if you’re mechanically comfortable, or up to six hours if this is your first time dealing with intake manifold removal on this engine family.
Why the 3.6 Pentastar Oil Filter Housing Fails
The 3.6-liter Pentastar V6 is genuinely a strong engine, but the factory oil filter housing has been a consistent source of frustration across the entire Chrysler product lineup. The housing is made of plastic — specifically a glass-filled nylon composite — that was designed to save weight and reduce manufacturing costs. Under normal operating conditions, it holds up fine for years. The problem develops over time as the plastic experiences repeated heat cycles, which causes it to become brittle, warp slightly at the sealing surfaces, and eventually crack or leak around the filter cap or housing body itself.
The housing also serves as a cooler in this application, meaning coolant passages run through or alongside the oil path. When the housing warps or cracks, you’re not just dealing with an oil leak — you’re also risking coolant contamination of your engine oil, or oil contamination of your coolant. Either scenario is serious and can accelerate engine wear significantly if ignored.
Common symptoms that indicate the housing is failing include an oily residue on the lower engine block below the filter, a burning oil smell while the engine is running, coolant that looks brown or milky in the reservoir, or an unexplained drop in oil level between changes.
Parts: OEM Plastic vs. Dorman Aluminum — Which One Should You Buy?
This is the most important decision you’ll make about this repair, and it’s one that the thin competitor content out there almost never addresses properly. You have two realistic paths.
The first is the OEM Mopar replacement housing, part number 68105583AG (or the latest revision for your specific build date). This part replicates what came from the factory and costs between $120 and $180 depending on where you source it. It solves the immediate leak, and for a vehicle you plan to sell in the next year or two, it gets the job done. The downside is that you’re replacing plastic with plastic, which means you may face the same failure in another five to eight years — or sooner, depending on how hard the truck works.
The second option is the Dorman 926-876 aluminum oil filter housing. At $250 to $320, it costs more upfront, but it permanently eliminates the thermal cracking issue because aluminum doesn’t warp or become brittle with heat cycles. For a truck you plan to keep, or if this is the second time you’re doing this repair, the aluminum upgrade is the smarter long-term investment.
In either case, you should also plan to replace the oil pressure sensor, the oil temperature sensor (if separate on your build), and all associated O-rings and gaskets. These parts are cheap — usually $15 to $40 combined — and they’re already exposed once the housing is out. Replacing them now saves you from going back in six months.
| Part | Part Number | Approximate Cost |
|---|---|---|
| OEM Mopar Plastic Housing | 68105583AG | $120 – $180 |
| Dorman Aluminum Housing | 926-876 | $250 – $320 |
| Oil Pressure Sensor | 05149062AA | $15 – $30 |
| Housing Gasket / O-ring Kit | Varies by brand | $10 – $25 |
| Intake Manifold Gasket Set | 68189635AA | $35 – $65 |
What the Replacement Job Actually Involves
Understanding the scope of this repair helps you appreciate why the book time sits where it does and why this job deserves more respect than a typical filter swap.
Intake Manifold Removal
The intake manifold must come off to access the oil filter housing properly on the 3.6 Pentastar. This means disconnecting the throttle body, fuel injector harness, MAP sensor, vacuum lines, and the manifold bolts themselves. None of this is exceptionally difficult, but it requires care and organization. A good habit is to photograph the engine bay before you disconnect anything, especially the vacuum routing, so reassembly doesn’t become a guessing game.
Coolant System Precautions
This is the step that causes the most expensive mistakes. Before disconnecting the oil filter housing coolant lines, you need to drain the cooling system down below the level of the housing. If you disconnect those lines with the system full, coolant will pour directly into the intake valley or down into the engine. On more than a few occasions, owners have had coolant drain past intake valve seals and into a cylinder — which is a hydro-lock risk on startup and an oil dilution problem that requires a full drain-and-flush before the engine runs again.
Drain the coolant first. It takes ten minutes and it protects you from a very expensive mistake.
Sensor and Fastener Care
The oil pressure and temperature sensors threaded into the housing are exposed to heat and engine grime for years. They tend to be stubborn. Use penetrating oil on the threads the night before if possible, and apply appropriate torque on reassembly rather than guessing by feel. Strip one of these sensors and you’re adding another hour and parts order to your day.
Total Cost Breakdown: Shop vs. DIY
| Scenario | Parts Cost | Labor Cost | Estimated Total |
|---|---|---|---|
| Shop (OEM plastic housing) | $150 – $200 | $300 – $525 | $450 – $725 |
| Shop (Dorman aluminum) | $270 – $340 | $300 – $525 | $570 – $865 |
| DIY (OEM plastic housing) | $150 – $200 | $0 | $150 – $200 |
| DIY (Dorman aluminum) | $270 – $340 | $0 | $270 – $340 |
These figures assume the job is clean with no broken bolts, no coolant contamination cleanup, and no additional sensor replacements beyond what’s planned. Real-world costs can rise if corrosion has done its job over the years.
Smart Bundling: What to Do While You’re Already In There
Since you’re removing the intake manifold regardless, this repair presents one of the best opportunities in the life of your truck to knock out several other maintenance items at the same time — spreading the labor cost across multiple jobs instead of paying full book time for each one separately.
The most obvious candidate is spark plugs. On the 3.6 Pentastar, the rear bank plugs are notoriously difficult to access with the intake manifold in place. With it already off, those plugs are right in front of you. A fresh set of Mopar or NGK spark plugs at this mileage is a straightforward and worthwhile addition.
It’s also worth inspecting the intake manifold gaskets while they’re exposed. If the originals show any cracking or compression marks, replace them now — they’re inexpensive and this is the only time swapping them costs you nothing in additional labor.
Finally, take a few minutes to inspect the wire harness and vacuum lines in the area. Brittle or cracked vacuum hoses in this part of the engine are a common source of mysterious idle quality complaints and lean-code check engine lights. Finding and replacing a cracked hose while everything is open costs almost nothing and prevents a future diagnostic visit.
A Note on the 2019 Ram Classic vs. 2019 Ram 1500 (New Body)
This distinction trips up a lot of owners and even some parts counter employees. The 2019 model year featured two completely separate Ram 1500 platforms sold simultaneously. The Ram 1500 Classic (sometimes called the DS platform) is the carryover design that dates back to 2009 — this is the truck this guide covers. The Ram 1500 (DT platform) is the all-new 2019 redesign with a different engine bay layout.
These two trucks have different oil filter housing designs, different part numbers, and in some cases different labor times. When sourcing parts or calling a shop for a quote, always confirm which platform you have. The VIN decoder will tell you definitively, or simply check whether your truck has a traditional round “box” body style versus the new sculpted cab design.
Conclusion
The 2019 Ram Classic 1500 3.6 oil filter housing book time of 3.0 to 3.5 hours reflects the genuine complexity of this repair — it’s not a simple filter swap, and any quote that prices it like one should give you pause. Understanding what drives that time, what parts to choose, and what additional steps to bundle into the job puts you in a position to either negotiate a fair shop price with confidence or tackle the repair yourself with a clear roadmap.
If your truck is a keeper, spend the extra money on the Dorman aluminum housing. Drain the coolant before touching anything. Replace the sensors while they’re accessible. And if you’re going to the trouble of pulling the manifold, do the spark plugs while you’re there. Small decisions made at this stage protect a significant investment for years to come.
Frequently Asked Questions
How long does it take a professional mechanic to replace the oil filter housing on a 2019 Ram Classic 1500 3.6?
The flat-rate book time for this job is typically 3.0 to 3.5 hours. This accounts for intake manifold removal, housing replacement, sensor transfer, and reassembly. A skilled technician who has done the job before may finish it faster, but the shop will still bill based on the published flat-rate time rather than actual clock hours.
Is the Dorman aluminum housing worth the extra cost over the OEM plastic unit?
For most owners, yes — especially if this isn’t the first time the housing has leaked or if you plan to keep the truck beyond 150,000 miles. The aluminum housing eliminates the root cause of the failure (thermal plastic degradation) permanently, while the OEM plastic replacement simply resets the clock on the same eventual problem.
Can I safely drive my Ram 1500 Classic with a leaking oil filter housing?
Not for long, and not without risk. A slow seep may give you some short-term flexibility, but oil leaks tend to progress rather than stabilize. More critically, if coolant and oil begin to mix through a cracked housing, you can cause accelerated bearing wear and corrosion damage throughout the engine in a surprisingly short amount of time. Address the leak promptly.
Do I need to drain the coolant before replacing the oil filter housing on the 3.6 Pentastar?
Yes, and this step is non-negotiable. The oil filter housing assembly on the 3.6L Pentastar has coolant passages running through it. Disconnecting it with a full cooling system will allow coolant to pour into the engine valley. In the worst case, it reaches a cylinder, creating a hydro-lock risk on the next startup. Drain the coolant below the housing level before you begin disconnection.
Is the oil filter housing the same on the 2019 Ram 1500 Classic and the standard 2019 Ram 1500?
No. These are two separate platforms. The Ram 1500 Classic (DS platform) and the redesigned Ram 1500 (DT platform) have different engine bay layouts, different housing designs, and different part numbers. Always confirm your platform before ordering parts or requesting a labor quote.
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