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2018 Dodge Charger R/T Oil Filter Housing Leak - Coolant Loss?

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Chris P. · rep 0 · May 22, 5:49 AM · 1 replies · solved · Question

Vehicle: 2018 Dodge Charger R/T

Hey everyone,

I've got a problem with my 2018 Dodge Charger R/T (5.7L Hemi, though I know the Pentastar has similar issues). Over the last few weeks, I've noticed a burning smell, especially after driving, and a small puddle forming under the car. At first, I thought it was just oil, but checking the dipstick and coolant reservoir, both seem a bit low.

Upon closer inspection, it looks like there's a leak coming from the top of the engine valley, near where the oil filter is located. It's a mix of what looks like oil and possibly coolant. Is this a known issue for these Chargers? I'm worried about potential engine damage if I keep driving it like this.

Has anyone else experienced this with their 2016-2026 Dodge Charger or other models? What was the fix, and how much did it set you back? Any advice on what to look for or if this is a common TSB or recall item would be greatly appreciated. Thanks!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:49 AM

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ClearTheCode admin answer:

It sounds like you're describing a very common issue with the oil filter housing assembly, which is a known weak point on many Dodge vehicles, including your 2018 Charger R/T, particularly those with the 5.7L Hemi engine (and also prevalent on the 3.6L Pentastar).

Here's what you need to know:

  1. The Problem: The oil filter housing assembly, often made of plastic, is prone to cracking or developing leaks from its internal gaskets over time due to heat cycles and material degradation. This assembly typically integrates the oil filter, oil cooler, and sometimes the oil pressure sensor and coolant passages.

  2. Symptoms & Causes:

    • Visible Leaks: You'll often see oil, coolant, or a mix of both leaking from the top of the engine valley, dripping down the back of the engine or onto the exhaust, causing a burning smell.
    • Low Fluid Levels: Consistent drops in oil and/or coolant levels.
    • OBD Codes: While a direct leak might not always trigger a specific code immediately, related issues can. If the oil pressure sensor (often integrated) is affected, you might see codes like P0520 (Engine Oil Pressure Sensor/Switch Circuit) or P0522 (Engine Oil Pressure Sensor/Switch Circuit Low Voltage). If coolant loss is significant, P0128 (Coolant Thermostat (Coolant Temperature Below Regulating Temperature)) could appear due to low coolant levels affecting temperature regulation.

  3. The Fix: The standard repair involves replacing the entire oil filter housing assembly, as the individual gaskets are often not serviceable, or the housing itself is cracked. It's crucial to use a high-quality replacement part, preferably Mopar, to ensure longevity.

  4. When to See a Shop: You should get this inspected and repaired as soon as possible. Continuing to drive with significant oil and/or coolant leaks can lead to severe engine damage, including overheating, loss of oil pressure, and potential catastrophic engine failure. A qualified mechanic will be able to confirm the leak source and perform the replacement, which can be a somewhat involved job due to its location.

This is a well-documented issue, and while not always a recall, there are numerous technical service bulletins (TSBs) and aftermarket solutions available. Address it promptly to avoid more costly repairs down the line.

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