Yanmar YM head bolts | Tightening torques

Yanmar YM1510 3T75U, YM226.

Yanmar is a Japanese manufacturer of land and marine engines. An engine’s cylinder head is an important part that covers the cylinders and controls the engine’s compression. It is important to correctly adjust the cylinder head torque to avoid problems with the engine.

The YM series, F series and FX series are different models of Japanese Yanmar tractors. Cylinder head torque values ​​for these models may vary, so it is important to consult the specifications of your specific model. In general, it is recommended to adhere to a correct tightening sequence.

There is a big difference between Yanmar agricultural machines and Yanmar marine engines. Agricultural machines are designed for land use, while Yanmar marine engines are designed for ship use. Marine engines must be specially designed to function in a boat, where they are exposed to salt water, waves and other specific conditions. This does not always mean that the tightening torques are different. It is important to compare the engines and parts in advance as certain parts may differ.

It is important to check and adjust the cylinder head torques of your Yanmar engine to the specifications of your specific model. This can help prevent problems with the engine and extend the life of the engine. If you are unsure about how to do this, always consult a professional mechanic or the manufacturer.

Valves.006, + 15.25mm

Head bolts 29, 58, finally 72 to 79 ft lbs. =in nm 39.3nm, 78nm, 97-107.2nm

Cylinder head assist bolts 22 ft. lbs.

2T73U | 2TR13A

Head bolts 29, 58, finally 114-116 ft lbs. = 15.5-16.0Kg-M

 

Watch out for the 3T72 series! Below is a table with an overview similar to the YM169.

Yanmar TNE Series

Main Bearing bolt torque

2TNE68, 3TNE68 (M9x1.25)
53-57 Nm
3TNE74 (M10x1.25)
80-85 Nm
3TNE78A, 3TNE82A (M10x1.5)
78-82 Nm
3TNE82, 4TNE82
3TNE84T, 4TNE84T
3TNE88, 4TNE88 (M12x1.5)
98-102 Nm

Yanmar TNE Series
Connecting Rod Bolt Torque

2TNE68, 3TNE68 (M7x1.0)
23-28 Nm
3TNE74 (M7x1.0)
23-28 Nm
3TNE78A , 3TNE82A (M8x1.0)
38-42 Nm
3TNE82, 4TNE82
3TNE84T, 4TNE84T
3TNE88, 4TNE88 (M9x1.0)
45-55 Nm

 

Yanmar TNE engines Cylinder Head Bolt Torques
2TNE68, 3TNE68 (M8x1.25)
38-42 Nm
3TNE74 (M9x1.25)
60-65 Nm
3TNE78A, 3TNE82A (M9x1.25
68-72 Nm
3TNE82, 4TNE82
3TNE84T, 4TNE84T
3TNE88, 4TNE88 (M10x1.25
87-93 Nm

 

 

 

Information continues to be completed. Or for questions feel free to ask!