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2.8L 12v - L28/L28E
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2.8L 12v - L28/L28E
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Reinforced Cometic head gasket, in MLS. Sold individually, one gasket per engine.
The Nissan L28 and L28E petrol engines, of 2.8 litres, are fitted to the Nissan 280Z, 280ZX, Cedric, Datsun 280C, Laurel, Leopard, Patrol and Skyline models listed below.
This original gasket carries the part number 11044-N4200. Its bore is 88.5 mm. Nissan publishes neither its construction nor its thickness. Each engine takes a single one. It is designed for standard combustion pressure: when that pressure increases, the clamping load weakens, the cylinder head lifts and coolant seeps into a cylinder.
Sealing does not depend on the head gasket alone: it leans on the fasteners, which press the head against the block. Beyond 100 N/mm² of admissible stress, a composite gasket is crushed for good, whereas the 301 stainless steel of MLS gaskets takes 517 N/mm², 5 times more, and recovers its shape after every combustion.
This page brings together the part numbers of Cometic, an American maker of racing gaskets, for a single construction: the multi-layer steel MLS. Every gasket has an 89 mm bore, against 88.5 mm for the original gasket, and thicknesses from 0.69 to 3.56 mm, enough to adjust the compression ratio without touching the pistons or the cylinder head. As a rule, the gasket bore chosen is at least 0.5 mm larger than the actual cylinder bore. Each part number is sold individually, one gasket per engine.
| Gasket bore OEM 88.5 mm | Thickness | Gasket volume | Gasket type OEM not specified | Brand | Part number OEM 11044-N4200 |
| 89 mm | 0.69 mm | 4.29 | MLS | Cometic | C4580-027 |
| 89 mm | 0.76 mm | 4.73 | MLS | Cometic | C4580-030 |
| 89 mm | 0.91 mm | 5.66 | MLS | Cometic | C4580-036 |
| 89 mm | 1.02 mm | 6.35 | MLS | Cometic | C4580-040 |
| 89 mm | 1.14 mm | 7.09 | MLS | Cometic | C4580-045 |
| 89 mm | 1.30 mm | 8.09 | MLS | Cometic | C4580-051 |
| 89 mm | 1.42 mm | 8.83 | MLS | Cometic | C4580-056 |
| 89 mm | 1.52 mm | 9.46 | MLS | Cometic | C4580-060 |
| 89 mm | 1.68 mm | 10.45 | MLS | Cometic | C4580-066 |
| 89 mm | 1.78 mm | 11.07 | MLS | Cometic | C4580-070 |
| 89 mm | 1.91 mm | 11.88 | MLS | Cometic | C4580-075 |
| 89 mm | 2.03 mm | 12.63 | MLS | Cometic | C4580-080 |
| 89 mm | 2.13 mm | 13.25 | MLS | Cometic | C4580-084 |
| 89 mm | 2.18 mm | 13.56 | MLS | Cometic | C4580-086 |
| 89 mm | 2.34 mm | 14.56 | MLS | Cometic | C4580-092 |
| 89 mm | 2.49 mm | 15.49 | MLS | Cometic | C4580-098 |
| 89 mm | 3.05 mm | 18.97 | MLS | Cometic | C4580-120 |
| 89 mm | 3.56 mm | 22.15 | MLS | Cometic | C4580-140 |
Gasket volume is the space it leaves open above each cylinder. This space adds to the combustion chamber: the larger it is, the lower the compression ratio. Compare this volume only between gaskets of the same bore.
| Fasteners | Engines | Tightening torque |
| Original cylinder head bolts | L28, L28E | not published by the manufacturer |
Before fitting the gasket, check with a straight edge that the head and the block are flat, and have them machined if necessary. Do not apply any sealing paste: Cometic supplies these gaskets already coated.
 | Cometic MLS A pile of stamped stainless steel sheets, held together by rivets. The outer sheets show active beads around each cylinder and each fluid passage. A moderate tightening torque is enough to seal and the bore barely distorts. This versatile solution suits anything from the tuned naturally aspirated engine to moderate boost. |
Gasket bore. The Cometic MLS is offered in 89 mm (C4580), in that bore only.
Thickness. Nissan does not publish the thickness of the original gasket. A thicker gasket enlarges the combustion chamber and lowers the compression ratio; a thinner one reduces it and raises the ratio.
| Your goal | Thickness to choose |
| Keep the original compression ratio | Original thickness not published: measure the removed gasket and keep the offered value closest to it |
| Skimmed cylinder head, make up the lost height | The offered value closest to the thickness measured on the original gasket, plus the material taken off |
| Forced induction build, lower the ratio | A thickness greater than the one measured on the original gasket at removal |
| Naturally aspirated build, raise the ratio | A thickness smaller than the one measured on the original gasket at removal, down to 0.69 mm, the lowest value offered |
If the chosen thickness is below the original one, read with a dial gauge the height by which the pistons stand proud of the block: this figure gives the clearance that remains between piston and head.
 | Cometic Gasket, Inc., an American maker of engine gaskets and sealing solutions, was founded in 1989 in Concord, Ohio. It has made a speciality of the custom gasket, cut to the bore and thickness required. All of its manufacturing remains in the United States, with American materials. |
| Criterion | Original gasket 11044-N4200 | Reinforced gaskets |
| Construction | Construction not stated by the manufacturer | Multi-layer stainless steel (MLS) |
| Gasket bore | 88.5 mm | 89 mm |
| Thicknesses available | thickness not published by the manufacturer | 0.69 to 3.56 mm, 18 values |
| Compression ratio adjustment | None | Through the thickness chosen |
| Resistance to overpressure | Limited to standard output | Designed for forced induction |
| Model | Engine code | Power | Years |
| 280Z Coupé (S30) 2.8 | L28E | 151 and 171 hp | 1974-1978 |
| 280ZX, ZXT (HGS130) 2.8 | L28E | 140, 146, 147 and 150 hp | 1978-1984 |
| Cedric (430) 2.8 | L28 | 147 hp | 1980-1983 |
| Cedric (430) 2.8 | L28E | 140 hp | 1983-1984 |
| Datsun 280C Berline (330) 2.8 | L28 | 135 and 147 hp | 1977-1979 |
| Datsun 280C Break (330) 2.8 | L28 | 135 hp | 1977-1979 |
| Laurel (HLC230) 2.8 | L28 | 120 hp | 1978-1983 |
| Laurel (JC32) 2.8 | L28E | 140 hp | 1986-1987 |
| Leopard Coupé (F30) 2.8 | L28E | 144 hp | 1981-1984 |
| Leopard I (F30) 2.8 | L28E | 144 hp | 1981-1984 |
| Patrol III/1 Hardtop (K160) 2.8 | L28 | 120 and 121 hp | 1980-1988 |
| Patrol III/1 Station Wagon (W160) 2.8 | L28 | 120 hp | 1980-1988 |
| Patrol III/2 Hardtop (K260) 2.8 | L28 | 120 hp | 1986-1990 |
| Skyline (R30) 2.8 | L28E | 140 hp | 1982-1987 |
OEM part number: 11044-N4200.
Important: the part numbers on this page fit only the L28 and L28E engines: check your vehicle's engine code before placing an order.
When the original gasket reaches its limit, the reinforced gasket takes over: even under higher combustion pressure, it keeps its shape instead of being crushed.
When power rises, through a supercharger, a turbo or a higher compression ratio, the head gasket is the first part to give way in the top end. Choosing a reinforced gasket therefore means putting reliability first: you avoid the breakdown, and the head removal that follows it.
