Subaru Oil Pan Gasket Replacement Cost
Resealing the lower oil pan using RTV silicone sealant (Subaru Boxer engines do not use a physical rubber gasket).
Why this fails
Subaru EJ and FB series engines (FB20/FB25) do not use traditional gaskets; they rely on RTV silicone that eventually hardens and shrinks due to thousands of heat cycles, resulting in seepage at the pan-to-block mating surface.
What the job involves
- Drain engine oil and remove the oil filter.
- Remove exhaust manifold sections or plastic under-guards (depending on model) to gain clearance.
- Carefully pry the stamped steel lower oil pan from the aluminum engine block.
- Scrape and clean all old RTV silicone from both mating surfaces until they are perfectly bare metal.
- Apply a continuous bead of ThreeBond 1217H sealant and bolt the pan back on within the 5-minute skin-over window.
If you delay this repair
Oil starvation can occur if the leak becomes severe. More commonly, oil drips onto the exhaust manifold (located directly below the pan on N/A models), creating a burning smell and a potential fire hazard.
Save money
- • Combine this repair with an oil change to avoid paying for oil and a filter twice.
- • If you have a minor 'seep' rather than a 'drip,' monitor it; boxer engines often sweat oil for years without needing immediate professional intervention.
- • Ask the shop to check the oil cooler O-ring while the pan is off; it's a common $5 part that fails and looks like a pan leak.
OEM part numbers
FAQ
How much does subaru oil pan gasket replacement cost cost in 2026?
Expect $450–$750 at most US shops, parts plus labor.
How long does the job take?
2.5–4 labor hours typically.
Can I do this myself?
Yes — DIY difficulty 4/5.
What happens if I delay?
Oil starvation can occur if the leak becomes severe. More commonly, oil drips onto the exhaust manifold (located directly below the pan on N/A models), creating a burning smell and a potential fire hazard.