Parts for your 2015 Nissan Pathfinder-Manifold gasket

2015 Nissan Pathfinder manifold gasket — what it does and when to replace it

Based on Nissan’s 2015 Pathfinder (R52, VQ35DE) factory service manual—Engine Mechanical (EM) and Exhaust (EX) sections—and genuine parts catalogue illustrations, this model is absolutely fitted with manifold gaskets. There are intake manifold gaskets sealing the plenum and lower runners, and exhaust manifold-to-cylinder head gaskets on each bank. So “manifold-gasket” is relevant to the 2015 Nissan Pathfinder.

The manifold gasket’s day job is simple but critical. On the intake side it seals the path between the manifold and the cylinder heads so only metered air gets in, keeping idle stable and fuel trims happy. On the exhaust side it keeps hot gases inside the manifold, protecting nearby components, preventing fumes in the cabin, and ensuring the oxygen sensors and catalytic converters get the right flow so the ECU can do its thing.

These gaskets aren’t a scheduled replacement item, but they do age—especially after overheating events or when manifolds are removed for other work. Any time the intake or exhaust manifold comes off on a 2015 Pathfinder, fresh OEM-spec gaskets should go back in. Mating faces need to be clean and flat, bolts torqued to spec following the factory sequence, and sealant avoided unless Nissan specifies it for a particular joint.

Common signs a gasket’s on the way out include:

• Intake side: rough idle, a whistling or hissing noise, lean mixture codes, higher fuel use.
• Exhaust side: ticking on cold start, soot marks around the flange, exhaust odour in the cabin, or failed emissions tests.

For intake leaks, a smoke test is a tidy way to confirm before parts start flying. After reassembly, it’s smart to clear trims and check for vacuum stability and any new DTCs. Exhaust leaks can be spotted with a cold-start listen test, a mirror/torch check for soot traces, or a low-pressure smoke check. On this Pathfinder, the exhaust manifolds are close to the catalytic converters, so keeping the seal tight helps protect those pricey units.

DIYers can handle the upper intake with patience and the right torque specs