Parts for your 2019 Haval H6-Exhaust gasket

2019 Haval H6 exhaust gasket: what it does and when to replace it

Based on the Haval H6 (2017–2020) workshop manual and Great Wall Motors electronic parts catalogues for the GW4B15/GW4C20 engines, the 2019 Haval H6 does use exhaust gaskets. These include the cylinder-head to exhaust-manifold gasket, turbo/manifold interface gasket or seal ring on turbo models, and flange or “donut” gaskets at downpipe and mid-pipe joints. Aftermarket catalogues for AU/NZ also list manifold and front-pipe gaskets for the 2019 H6, confirming fitment on this model.

The exhaust gasket’s job is simple but critical: it seals hot gases so they flow through the turbo (if fitted), catalytic converter and mufflers without leaking. A good seal keeps the car quiet, protects nearby components, maintains correct backpressure and turbo response, and ensures oxygen sensor readings stay accurate so the engine runs sweet as. On the H6, the manifold gasket is typically a multi-layer steel (MLS) type, while some joints use crush/graphite rings or steel shim seals.

• Common signs of a leak: a ticking or chuffing noise (especially on cold start), whiffs of exhaust near the bay, soot marks at a flange, sluggish boost, or a check engine light from skewed O2 readings.
• Replace whenever the joint is disturbed (manifold, turbo, or downpipe off), if noise/odour appears, or at the first sign of soot tracking.

For servicing, it’s not a scheduled replacement item, but it’s smart to inspect during routine underbody checks (every 20,000–30,000 km, or at each service when the car’s on the hoist). Look over the manifold area, turbo flanges, and front pipe for soot, staining, or loose hardware. Any time the exhaust is apart, fit new gaskets and replace heat-cycled studs/nuts. Clean mating faces gently, align components without forcing, and tighten in the factory sequence to the workshop manual torque specs. Avoid generic sealants on oxygen-sensor or turbo-adjacent joints unless the manual specifically calls for a sealant.

Quality matters here: go for OEM or reputable MLS/graphite gaskets suited to the H6 engines. A sealed system helps it pass roadworthy/WOF noise checks, keeps fumes out of the cabin, and protects the turbo and cat. If tools or hot exhausts aren’t your thing, a competent workshop can pressure/smoke-test, replace the failed gasket, and recheck for leaks after a heat cycle.

Does the 2019 Haval H6 have both a manifold gasket and a turbo gasket?

Yes. The H6 uses a manifold-to-head gasket on all engines, and turbo-equipped variants also use sealing at the turbo-to-manifold and turbo-to-downpipe joints. These are typically MLS or steel/crush-ring styles designed for high heat and pressure.

How long should an exhaust gasket last on a 2019 H6?

Often the life of the vehicle if untouched. Heat cycles, corrosion, or disturbing the joint (manifold/turbo removal) can shorten life. Many last 100,000–200,000 km, always replace gaskets any time the joint is undone.

Can a leaking exhaust gasket harm the turbo or catalytic converter?

It can. A pre-turbo leak can slow spool and raise turbo stress, a leak before the cat can skew O2 readings and fuel trims, potentially over-fuelling and overheating the converter. It also risks exhaust fumes entering the cabin, so it’s worth fixing promptly.