Parts for your 2020 Haval H6-Exhaust gasket

2020 Haval H6 exhaust gasket — what it does and when to replace it

Based on factory sources — the GWM/Haval workshop manual for the 2017–2020 H6 (GW4B15/GW4C20 turbo-petrol engines), the Haval electronic parts catalogue (EPC), and independent repair databases such as Autodata and Mitchell 1 — the 2020 Haval H6 uses exhaust gaskets. These include the exhaust manifold gasket at the cylinder head and crush/metal-ring or MLS gaskets at turbo-to-manifold and turbo-to-downpipe/catalyst flanges. So an exhaust gasket is absolutely relevant on this model.

On the 2020 Haval H6, the exhaust gasket’s job is to seal hot gases as they leave the engine and pass through the turbocharger and catalytic converter. A proper seal keeps the cabin free of fumes, preserves quiet operation, and lets the oxygen sensors and turbo see stable flow and pressure — key for fuel economy and smooth boost.

The H6 typically uses multi-layer steel (MLS) at the manifold and formed steel/graphite rings or crush gaskets at flanged joints. Once compressed, these are designed for a single use. Any time the manifold, turbo or downpipe is removed, new gaskets should be fitted. The mating faces need to be clean and flat, with new hardware used where studs or nuts are heat-cycled or corroded. No sealant should be added unless the workshop manual explicitly calls for it.

Tell-tale signs of a leaking exhaust gasket on a H6 include a sharp ticking on cold start, a hiss under load, soot marks around joints, a whiff of exhaust near the bonnet, and sometimes a check engine light from skewed O2 readings. On turbo variants, drivers may also notice lazy spool or a small drop in boost.

Best practice servicing for this model:

• Inspect manifold and turbo/downpipe joints for soot tracks and noise at every major service or whenever underbody work is done.
• Replace any gasket disturbed during turbo, manifold, catalyst or exhaust repairs. Reuse is false economy.
• Follow the OEM torque specs and tightening sequence for the manifold and turbo flanges, heat shields go back on to protect nearby components.
• Choose quality OEM or reputable aftermarket MLS/ring gaskets, cheap composites often don’t last the heat cycles.

For Australia and New Zealand, exhaust leaks can lead to a failed roadworthy/WOF and may affect emissions compliance. Keeping the H6 sealed up tight protects the turbo and catalyst and keeps the cabin air sweet.

Popular questions about 2020 Haval H6 exhaust gaskets

Does the 2020 Haval H6 actually have an exhaust gasket?
Yes. OEM workshop documentation and the Haval EPC specify an exhaust manifold gasket plus gaskets at turbo and downpipe flanges on the 2020 H6. These parts are service items whenever those joints are separated or a leak is present.

What are the symptoms of a blown exhaust gasket on a H6?
Common clues are a ticking or chuffing noise on cold start, a hiss under acceleration, soot deposits around the joint, and an exhaust smell near the engine bay. Some vehicles show a check engine light from oxygen sensor readings being upset, and turbo trims can feel a touch flat on boost.

Is it safe to keep driving with a small exhaust leak?
It’s not recommended. Aside from noise and fumes, leaks can skew O2 data, lift exhaust gas temperatures, and stress the turbo and catalyst. In AU/NZ, a noticeable leak can also fail a roadworthy/WOF. It’s better to replace the affected gasket and hardware promptly.