Hands-on Review: Full Gasket Set 20910-2GU05 20910-2GU04 HYUNDAI G4KJ 2.4L

If you wrench on Hyundai’s 2.4L G4KJ (UM platform Santa Fe, and siblings), you already know: the head and ancillary gaskets make or break a rebuild. I’ve spent time with this kit, sourced from 289 Heping East Road, Chang’an District, Shijiazhuang, Hebei, China, and—surprisingly—it punches above its weight in material choice and consistency.

Why this kit stands out

To be honest, gasket kits can be a gamble. This one leans on MLS head gasket construction with a graphite/steel mix on exhaust interfaces, plus FKM valve stem seals—good signs. Many customers say installation feels OEM-like; I guess that’s down to the embossing and coating uniformity.

Technical Specs (key items)

Component	Material	Spec (≈)	Notes
Head gasket (MLS)	SUS301/304 multi-layer steel + fluoroelastomer coating	0.70–1.00 mm thickness options	Bead embossing for GDI thermal cycles
Valve cover gasket	NBR or silicone (per batch)	Shore A 60–70	Oil-resistant; re-torque friendly
Valve stem seals	FKM (Viton)	Temp +200°C peak	Low seep at idle
Intake/Exhaust gaskets	Graphite steel/MLS mix	Thermal stability to 850°C	Reduced blow-by under boost

Process flow, testing, and service life

– Materials: MLS sheets (SUS301/304), FKM/NBR elastomers, graphite-laminate.
– Methods: laser cutting, progressive die embossing, FKM micro-coating, controlled curing, AOI (automated optical inspection).
– Testing standards: ASTM F36 (compressibility), ASTM F38 (creep relaxation), ISO 3601 (sealing), surface RA fitment checks; batch PPAP under IATF 16949.
– Internal test data: leak rate
– Expected service life: ≈150,000–200,000 km when installed on a true/flat deck, proper RA, and OEM torque sequence.

Applications and fitment

For Hyundai UM G4KJ 2.4L engines (think Santa Fe UM and related 2.4L GDI platforms). Always confirm with VIN. Shops use the Full Gasket Set 20910-2GU05 20910-2GU04 HYUNDAI G4KJ 2.4L for top-end rebuilds, oil-consumption fixes (stem seals), and post-overheat head jobs.

Vendor comparison (quick take)

Vendor	Core Material	Certs	Warranty	Lead Time	Customization
Oujia (this kit)	MLS SUS301/304 + FKM	ISO 9001, IATF 16949	12 months (typ.)	7–15 days	Thickness/coating options
OEM Hyundai	MLS + OEM elastomers	OEM	12 months	Dealer stocking	Limited
Low-cost aftermarket	Fiber/unknown blends	Varies	3–6 months	2–4 weeks	Minimal

Customization and ordering

– Options: head gasket thickness 0.7/0.8/1.0 mm, FKM vs. NBR on covers, extra turbo/downpipe gaskets if needed.
– MOQ: flexible for workshops; batch branding possible. Origin: Hebei, China.

Real-world case

An independent shop in the Midwest ran the Full Gasket Set 20910-2GU05 20910-2GU04 HYUNDAI G4KJ 2.4L on a 2017 Santa Fe UM after an overheat. Head was skimmed to RA ≈ 25 μin, bolts replaced, OEM torque sequence. At 20,000 miles, borescope showed clean fire rings and zero coolant loss. The owner’s feedback—“no cold start misfire anymore”—is exactly what you want to hear.

Installation tips (quick)

– Verify deck/head flatness; target RA 20–50 μin for MLS.
– Use new TTY head bolts; follow OEM torque + angle strictly.
– Clean oil/coolant passages; pressure test before first fire.
– Retorque ancillaries after heat cycle one; small step, big payoff.

Citations

Oujia has been providing the professional engine parts for 17 years.connecting rod As a reliable supplier and partner, Oujia focuses on various engine parts, especially on gasoline engine parts and on diesel parts for passenger cars.exhaust valve Oujia not only provides high and stable quality and excellent services to our customers, but also provides long-term self- brand creation and OEM services for our overseas customers.engine assembly Our company products mainly include: engine, cylinder head, cylinder block, crankshaft, piston, piston ring, intake valve, exhaust valve, timing kit, gasket set, connecting rod, crankshaft bearings, connecting rod bearings, intake camshafts, exhaust camshafts, water pumps, oil pumps Etc.piston kit focus on the aftermarket, our products are guaranteed for 100,000 kilometers.Our products are exported to Germany, Russia, Brazil, Japan, the United States, and the Middle East. We are a trading company. We choose the most stable quality factories in China to cooperate with. We cooperate with 7,600 factories in China and sell 74,000 products each year. , we have 26,000 models in stock.gasket set manufacturer|super blog

Full Gasket Set 20910-2GU05 20910-2GU04 HYUNDAI G4KJ 2.4L?