Parts for your 2008 Nissan Pathfinder-Manifold gasket

2008 Nissan Pathfinder manifold gasket — what it does and how to look after it

Yes, a manifold gasket absolutely applies to a 2008 Nissan Pathfinder. Nissan’s Factory Service Manual for the R51 (2008) lists both intake manifold gaskets and exhaust manifold gaskets for the VQ40DE petrol V6 and the YD25 diesel, and Nissan’s OEM parts catalogues back that up. So, manifold gaskets are very much part of this vehicle’s engine hardware.

The manifold gaskets seal critical joints: on the intake side they keep unmetered air from sneaking past the throttle and sensors, and on the exhaust side they stop hot gases escaping before the oxygen sensors and catalytic gear can do their job. Made from multi-layer steel or composite materials, they compensate for heat cycles and expansion so the engine runs smoothly, cleanly, and efficiently under the bonnet.

For servicing, these gaskets aren’t a routine “time-based” replacement item. They’re replaced when there’s a confirmed leak or whenever the manifold is removed for other work. Any time the intake plenum or exhaust manifold comes off on a 2008 Pathfinder, new gaskets should go back in, following the FSM torque specs and tightening sequence. Mating surfaces need to be clean and flat, if the manifold face is warped or pitted, it’ll just chew through the next gasket.

• Common intake-leak signs (petrol): rough idle, whistling, lean codes, higher fuel trims, sluggish response.
• Common intake-leak signs (diesel): boost whistle, oily/sooty deposits at the joint, reduced torque.
• Common exhaust-leak signs: ticking on cold start, soot around the flange, exhaust smell in the bay, O2 sensor faults, poorer fuel economy.

Good workshop practice on an R51 includes replacing manifold studs/nuts as required, checking for cracked manifolds (especially on high-heat exhaust sides), and avoiding sealants unless the FSM specifically calls for them. Quality OEM-equivalent gaskets are worth it, they hold torque better and cope with Aussie and Kiwi heat, towing, and long kays. If there’s any doubt—noise, smell, or odd trims—pressure or smoke testing will quickly pinpoint leaks and save time.

Left to leak, an intake gasket can lean out the mixture on the petrol V6 or upset airflow on the diesel, while an exhaust leak can cook nearby components and skew sensor readings. Sorting it early keeps the Pathfinder running sweet and compliant.

Popular questions

Does the 2008 Pathfinder have both intake and exhaust manifold gaskets?
Yes. The R51 2008 Pathfinder (VQ40DE petrol and YD25 diesel) uses gaskets on the intake manifold/plenum and on the exhaust manifolds. Nissan’s Factory Service Manual and parts catalogues list these as separate service parts.

How often should the manifold gaskets be replaced?
There’s no fixed interval. They’re replaced when leaking or whenever a manifold is removed. Symptoms like ticking, whistling, rough idle, soot at a flange, or fuel-trim faults are cues to inspect and, if needed, renew the gasket.

Is it safe to drive with a leaking manifold gasket?
It’s not ideal. An intake leak can cause a lean condition on the petrol V6 and poor driveability, an exhaust leak can overheat nearby bits and throw off sensor readings. Short trips might be manageable, but it’s best to repair promptly to avoid knock-on damage.