Cylinder head and sealing

Oil pans

Oil pans (sumps) that close the bottom of the engine and hold the oil reserve, with the drain plug seat, the baffles and the pick-up clearance of the original, in pressed steel or cast aluminium as the engine was built, for European and Japanese passenger cars, identified by OE reference.

MONTTRON oil pans: a cast aluminium upper sump section and a pressed steel oil pan with its drain plug

The oil pan, or sump, closes the bottom of the crankcase and holds the engine’s oil reserve. The oil pump draws from it through a pick-up pipe with a strainer, and baffles inside the pan keep the oil around the pick-up when the car corners, brakes or climbs. The pan carries the drain plug, and on many engines the oil level sensor and the mounting for a splash guard. Pressed steel pans are on most older and smaller engines; many modern engines use a cast aluminium pan, sometimes in two sections, that also stiffens the bottom of the block.

Pans are damaged from outside and wear from inside. A kerb, a speed bump or debris on the road dents a steel pan, so the pick-up sits too close to the floor, or cracks an aluminium one; salt corrodes a steel pan until it weeps; and a drain plug that has been over-tightened at every service strips the thread, so the plug will no longer seal. The gasket or the sealant joint between pan and block hardens and leaks with age.

MONTTRON oil pans are made to OEM-compliant quality and as aftermarket spare parts: the flange, the bolt pattern, the depth and the drain plug thread of the original, so the pan fits the original pick-up, baffle and sensor positions. The materials are tested for durability and temperature resistance.

The range covers European and Japanese passenger cars. Each reference is identified by the OE number of the original part; send that number and the vehicle identification number (VIN) and we confirm the matching MONTTRON reference.

For availability and OE cross-references, contact us by email.

Frequently asked questions

What makes an oil pan leak?
A hardened gasket or sealant joint, a dented or cracked pan after contact with a kerb or debris on the road, corrosion of a steel pan from the outside, or a drain plug thread that has been stripped by over-tightening. A pan with a stripped thread or a crack is replaced; a weeping gasket is renewed with the pan cleaned and the bolts torqued in order.
Steel or aluminium?
The one the engine was built with. Pressed steel pans are on most older and smaller engines; many modern engines use a cast aluminium pan that also stiffens the block and carries the oil level sensor. MONTTRON supplies the pan to the original design, identified by the OE number.

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