Parts for your 2017 Subaru Exiga-Exhaust gasket

2017 Subaru Exiga (Crossover 7) Exhaust Gasket — What It Does and When to Replace It

Per Subaru’s Global Service Manual (FB20 exhaust section) and the Subaru FAST electronic parts catalogue for the 2017 Exiga/Crossover 7, this model uses exhaust gaskets at multiple joints — multi‑layer steel gaskets between the cylinder head and exhaust manifold, and crush/“donut” ring gaskets at the front pipe and other flanged joints. So yes, an exhaust gasket is absolutely relevant on a 2017 Subaru Exiga.

On this Exiga, the exhaust gasket’s job is simple but critical: keep hot exhaust gases sealed inside the system from the head all the way back to the muffler. A good seal stops fumes sneaking into the cabin, keeps the note civil, helps the oxygen sensors read properly for fuel trims, and protects nearby components from heat and soot. The manifold-to-head gasket is typically a multi-layer steel design to handle big heat cycles, while the front pipe and centre/rear joints use crush-style ring gaskets that deform slightly to seal against minor imperfections.

There’s no fixed replacement interval for exhaust gaskets, but they do harden, flatten, or corrode with age, heat, and road grime. Any time the exhaust is removed — say for a clutch job on manuals, catalytic work, or a muffler swap — plan on new gaskets. Reusing old ones is a false economy, once compressed and heat-cycled, they rarely reseal well. Subaru also specifies spring bolts and hardware at certain joints, replacing tired hardware helps maintain correct clamping force and prevents future leaks.

Common signs it’s time to act include:

• Ticking or puffy “chuffing” noise on cold start that softens as it warms
• Sharp exhaust leak noise under load, sulphur/sooty odour, or visible black soot at a flange
• Poor fuel economy or a check engine light from skewed O2 readings

Service tips for the Exiga’s exhaust gaskets:

• Inspect at regular services (every 10,000–15,000 km) for soot marks and loose hardware
• Always fit new gaskets when disturbing any joint, clean mating faces carefully
• Follow Subaru torque specs and tightening order, over-tightening can warp flanges
• Use penetrating fluid on old studs, go easy on anti‑seize as it alters torque values
• Keep oils and sprays away from O2 sensors and catalytic sections

A competent DIYer can handle rear-section gasket swaps, but manifold or front pipe work is best left to a workshop, as seized hardware and sensor placement can get tricky. Done right, fresh gaskets keep the 2017 Exiga running quiet, clean, and efficient — exactly how it should be.

Popular questions about 2017 Subaru Exiga exhaust gaskets

Does the 2017 Subaru Exiga use exhaust gaskets?
Yes. Factory documentation lists manifold-to-head gaskets and ring/flange gaskets along the front pipe and downstream joints. They’re essential to sealing and system performance.

What are the signs of a leaking exhaust gasket on a Crossover 7?
Cold-start ticking, exhaust odour, visible soot at a joint, or a louder, raspier note. In some cases, fuel economy dips or a fault code appears due to skewed O2 sensor data.

Can it be driven with a minor exhaust gasket leak?
Short-term, maybe — but it’s not ideal. Leaks can let fumes enter the cabin, can worsen over time, and may trigger engine management issues. It’s best to sort it promptly.