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Isuzu i-370 Secondary Air Injection Pipe Gaskets

Isuzu i-370 Secondary air injection pipe gaskets

Starting at $5.95, AutoBuffy stocks 1 secondary air injection pipe gaskets from Elring. This gasket seals the connection between the air injection pipe and the exhaust manifold or cylinder head, allowing the secondary air system to feed fresh air into exhaust gases for cleaner emissions. A failed gasket leaks exhaust, triggers check engine lights, and causes the vehicle to fail emissions testing.

Signs your Isuzu i-370 needs a new secondary air injection pipe gasket

  • Check engine light with codes P0410, P0411, P0412, or related secondary air system fault codes stored in the ECM
  • Audible hissing or exhaust blowing sound near the air injection pipe connection at cold start, when the pump is active
  • Burnt or sulfur smell coming from the engine bay during the first minute of operation
  • Failed state emissions or smog inspection due to secondary air system not meeting flow or pressure thresholds
  • Visible carbon tracking, soot deposits, or discoloration around the pipe-to-manifold joint where the gasket sits
  • Secondary air pump running longer than normal or cycling on and off irregularly as the ECM compensates for detected leaks

Which secondary air injection pipe gasket should you buy for your Isuzu i-370?

The main decisions are material grade and whether you need a single gasket or a kit covering the full pipe-to-manifold circuit. OE-spec gaskets match the exact thickness and heat rating the factory used, while performance-grade multi-layer steel (MLS) options handle higher exhaust temperatures and repeated thermal cycling better. Position also matters — some Isuzu i-370 applications use separate gaskets at the pump outlet, the pipe junction, and the manifold port, so confirm how many sealing points your system has.

OE-Replacement Graphite Gasket
Best for
Restoring factory performance on a stock Isuzu i-370
What you get
Matches original material, thickness, and bolt pattern; reliable seal under normal exhaust heat
Multi-Layer Steel (MLS) Gasket
Best for
Isuzu i-370 with high mileage or repeated overheating history
What you get
Superior heat resistance, less prone to blowout, longer service life in high-temp environments
Full Secondary Air System Gasket Kit
Best for
Complete system repair or pump/pipe replacement on a Isuzu i-370
What you get
Includes all gaskets for the pump outlet, pipe joints, and manifold port in one purchase
Position-Specific Manifold Port Gasket
Best for
Isolated leak at the manifold connection only on a Isuzu i-370
What you get
Targeted fix for the most common failure point; lower cost when only one seal has failed

Secondary air injection pipe gaskets brands we stock for your Isuzu i-370

Elring
1 option · from $5.95

Replacing secondary air injection pipe gaskets on a Isuzu i-370

Moderate⏱ 1–2 hoursSocket set and ratchet with extensionsPenetrating oil (for corroded exhaust fasteners)Gasket scraper or plastic scraper for surface prepThread chaser or tap setTorque wrench

Spray all pipe and manifold fasteners with penetrating oil well before starting, as exhaust hardware corrodes aggressively and broken studs significantly extend the job. Once fasteners are removed, clean both mating surfaces completely — any remaining old gasket material or carbon buildup will cause the new gasket to leak. Reinstall fasteners evenly in a crossing pattern, tightening to the manufacturer's specified range for exhaust flange hardware on your Isuzu i-370.

Frequently asked questions

How much does it cost to replace secondary air injection pipe gaskets on a Isuzu i-370?
The gasket itself starts at $5.95 at AutoBuffy. Total repair cost depends on how many sealing points need service and labor rates in your area. DIY replacement keeps costs near the parts price alone, while a shop will add one to two hours of labor on top of the gasket cost.
Can I drive my Isuzu i-370 with a leaking secondary air injection pipe gasket?
Short trips are possible but not advisable. A leaking gasket allows hot exhaust gases to escape near plastic and rubber components, creating a fire and heat-damage risk. The check engine light will stay on, your Isuzu i-370 will likely fail emissions, and ongoing exhaust backflow can accelerate corrosion of the air injection pipe itself.
Will replacing the secondary air injection pipe gasket clear the check engine light on my Isuzu i-370?
If the gasket leak is the confirmed root cause of the fault code, yes — once replaced and the system holds proper pressure, the ECM will clear the code after a completed drive cycle. If the pump, valve, or pipe are also damaged, those components must be addressed or the light will return.
How long do secondary air injection pipe gaskets last on a Isuzu i-370?
Service life varies widely depending on heat exposure, coolant and oil leak contamination, and how often the secondary air pump cycles. On most vehicles, these gaskets outlast the pump itself, but exhaust heat, rust, and freeze-thaw cycles on northern roads can cause failure well before other major service intervals.
Is replacing a secondary air injection pipe gasket a DIY job on a Isuzu i-370?
It is a moderate DIY task. Access to the pipe and manifold connection is often tight, corroded fasteners are common on heat-cycled exhaust hardware, and the old gasket material must be fully cleaned from mating surfaces before installation. Basic hand tools and a thread chaser or penetrating oil for stuck bolts are usually enough.
How do I know if my Isuzu i-370 has one gasket or multiple at the air injection pipe?
Check your vehicle's service manual or the part listing for your specific Isuzu i-370 on AutoBuffy. Secondary air systems on some engines seal at three or more points — pump outlet, pipe-to-pipe junction, and manifold port — each requiring its own gasket. A full kit listing will confirm how many sealing surfaces your system uses.

Shop secondary air injection pipe gaskets by year for the Isuzu i-370

20082007

More parts for your Isuzu i-370

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Secondary air injection pipe gaskets for other Isuzu models

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