The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Coolant Leak on my 2018 Grand Caravan - What's going on?

0

Mark S. · rep 0 · May 22, 5:49 AM · 1 replies · solved · Question

Vehicle: 2018 Dodge Grand Caravan SXT

Hey everyone,

I've noticed a sweet smell around my 2018 Dodge Grand Caravan SXT lately, and today I finally saw a small puddle of greenish-pink fluid under the front of the vehicle. It's definitely coolant, and the reservoir level looks a bit low.

I'm worried about what this could be. Is this a common issue for these vans? I've heard some things about coolant leaks on Dodge vehicles, but I'm not sure if it applies to my model year. Any advice on what to check or what the typical culprits are?

I want to get this fixed before it becomes a bigger problem, especially since we use it for family trips. Thanks in advance for any help!

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

It sounds like you're dealing with a common issue for many Dodge vehicles equipped with the 3.6L Pentastar engine, including your 2018 Grand Caravan. The sweet smell and greenish-pink fluid are classic signs of a coolant leak.

Here's what's likely going on and what you should do:

  1. Likely Cause: Oil Filter Housing Assembly. The most frequent culprit for coolant leaks on these engines is the integrated oil filter housing and oil cooler assembly. This unit, often made of plastic, sits on top of the engine block under the intake manifold. It contains both oil and coolant passages and is prone to cracking or developing gasket leaks over time due to heat cycles and material degradation.
  2. Other Potential Causes: While less common, also check for leaks from the radiator, coolant hoses, water pump, or the thermostat housing itself.
  3. Diagnostics:
    • Visual Inspection: Carefully inspect the area around the oil filter housing (you might need to remove the upper intake manifold for a clear view, which is a job for a professional). Look for coolant residue or active drips. Also, check all visible hoses and the radiator.
    • Pressure Test: A cooling system pressure test is the most effective way to pinpoint a leak. A shop can pressurize the system and visually locate the source of the leak.
    • OBD Codes: While a direct leak won't always trigger a code, a significant leak affecting engine temperature could potentially lead to a P0128 (Coolant Thermostat (Coolant Temperature Below Regulating Temperature)) if the engine struggles to reach operating temperature.
  4. When to See a Shop: You should get this inspected and repaired as soon as possible. Coolant leaks, even small ones, can lead to engine overheating, which can cause severe and expensive engine damage. Continuing to drive with a low coolant level is risky. A professional technician can accurately diagnose the leak, replace the faulty oil filter housing assembly (which often involves replacing multiple gaskets), and properly bleed the cooling system. Ensure they use the correct Mopar OAT (Organic Acid Technology) coolant for your vehicle.
Menu

Help & account