Full Gasket Set or Top Gasket Set? Differences and the Right Choice
In engine repair, gaskets can be purchased individually or as a set. Sets are sold under different names depending on their scope; choosing the wrong set leads to either incomplete work due to missing parts or unnecessary costs. In this article, we explain the differences between full gasket sets, upper gasket sets, and full gasket sets without cylinder head gaskets, and which one to choose for specific repairs.
Full gasket set (complete engine gasket set)
A full gasket set contains all the necessary gaskets and seals for a general engine overhaul (reconditioning). Its typical contents include:
- Cylinder head gasket
- Valve cover gasket
- Intake and exhaust manifold gaskets
- Valve stem seals
- Oil pan gasket
- Front and rear crankshaft seals, camshaft seals
- Auxiliary gaskets such as water pump, thermostat, oil pump
If the engine is being completely disassembled, the correct choice is a full gasket set. You can find sets by engine code and OEM number in the full gasket sets category.
Upper gasket set (cylinder head overhaul set)
An upper gasket set is prepared only for repairs where the cylinder head is removed: such as a blown gasket, head resurfacing, valve adjustment, or valve replacement. It typically includes the cylinder head gasket, valve cover gasket, manifold gaskets, valve stem seals, and small gaskets on the head. Oil pan gaskets and crankshaft seals are not included in this set.
When replacing a cylinder head gasket, it is often more accurate to purchase an upper set rather than a single gasket; when the head is removed, the manifold and valve cover gaskets are also opened, and reusing them carries a risk of leakage. You can browse the sets in the upper gasket sets category.
Full gasket set without cylinder head gasket
Some sets are prepared excluding the cylinder head gasket. These are used in engines where the head gasket must be selected separately based on its thickness class, or when the gasket is already procured individually. They are referred to in catalogs as "without head gasket" or "excluding head gasket." Be sure to check whether the set includes a head gasket before placing an order.
Comparison
| Set | When? | Head gasket | Oil pan & crankshaft seals |
|---|---|---|---|
| Full gasket set | General engine overhaul | Yes | Yes |
| Upper gasket set | Cylinder head repair | Yes | No |
| Full set without head gasket | Overhaul; if head gasket is chosen separately | No | Yes |
Set contents may vary depending on the engine and manufacturer; the table provides a general framework. Precise contents are specified on the product page and in the catalog.
Which one should I choose?
- If the engine is being removed from the block for an overhaul: full gasket set.
- If only the head is being removed (blown gasket, resurfacing, valve work): upper gasket set.
- If the head gasket needs to be chosen separately based on thickness: full gasket set without head gasket and a cylinder head gasket of the correct thickness.
- If there is a leak at a single point: buy the relevant gasket individually. You can check the oil pan gaskets, valve cover gaskets, and crankshaft seals categories.
Information required for ordering
- Engine code (found on the engine block or in vehicle documents)
- OEM number (if available)
- Vehicle's production year and engine displacement
- For diesel engines, the head gasket thickness class
We explained how to find the engine code and OEM number in our finding the right gasket with an OEM number guide. You can read our article on cylinder head gasket failure symptoms, and contact us for wholesale orders.