XU series engine
Decal location on XU engine block for main bearing selection
A. Barcode (used in engine manufacturing)
B. Designation signs
On some engines, the upper and lower halves of the bearings were the same thickness.
On engines of later releases, the working clearance of the bearings was significantly reduced, and in order for this condition to be met, 4 different liners are used, which are indicated by a colored mark on the end. The color of the label indicates the thickness of the liner. The upper shell on all bearings has the same size, and the working clearance is adjusted by setting the lower shell of the required thickness.
Engines 1.6 liters
Label color | Thickness (mm) | |
Standard | Repair | |
Top liner | ||
Yellow | 1,856 | 2,006 |
Bottom liner | ||
Blue (Class) A | 1,836 | 1,986 |
Black (Class) B | 1,848 | 1,998 |
Green (Class) C | 1,859 | 2,009 |
Red (Class) D | 1,870 | 2,020 |
On later engines, new liners can be selected using the marks on the cylinder block. In the absence of marks, liners can only be selected by measuring the working gap. The marks on the cylinder block are on the left side of the block, and the crankshaft marks are on the end of the crankshaft jumper. These marks can be used to select a liner of the required thickness as follows.
There are two lines of identification on the crankshaft and cylinder block: a bar code used by Peugeot in production, and a row of five designations. The first designation in the sequence refers to the size of the first insert number. Last designation in sequence (which is accompanied by an arrow) refer to the size of the number of the fifth earbud.
Determine the designation number from the specific crankshaft journal and cylinder block bearing bore.
Liner Selection Nomogram
On the upper axis of the nomogram, mark the designation of the crankshaft and draw a vertical line through this point. On the left vertical axis of the nomogram, mark the designation of the cylinder block and draw a horizontal line through this point. The point of intersection of the lines indicates the size of the bushing to provide the required clearance.
For example, the nomogram shows that the crankshaft points to 6 and the cylinder block points to H, the intersection point within the red area determines that red (Class D) most suitable for obtaining the required clearance.
Repeat this operation to select the bearings for the rest of the crankshaft main journals.
XUD Series Diesel Engine
On diesel engines, the top and bottom liners are the same thickness.