Volkswagen Workshop Service and Repair Manuals > Polo Mk4 > Engine | 4 - Cyl. diesel engine (with unit injectors) | Enginecrankshaft group, pistons | Pistons and rods - disasemble and assemble | Piston position on upper part - check

Head joint identification > < Piston position on upper part - check

Checking sequence

When installing new pistons or part of engine, check piston position on upper part. Depending on piston protuberance a corresponding head seal must be installed, as per chart:

Note

To measure piston protuberance on upper part, turn engine clockwise.

Piston protuberance	Identification: Incision/Holes
0.91 mm ... 1.00 mm	1
1.01 mm ... 1.10 mm	2
1.11 mm ... 1.20 mm	3

Engine
4 - Cyl. diesel engine (with unit injectors)
Enginecrankshaft group, pistons
Pistons and rods - disasemble and assemble / ston_position_on_upper_part_check/">Piston position on upper part - check
Checking sequence

Head joint identification > < Piston position on upper part - check

Volkswagen Workshop Service and Repair Manuals

Polo Mk4

Engine 4 - Cyl. diesel engine (with unit injectors) Enginecrankshaft group, pistons Pistons and rods - disasemble and assemble / ston_position_on_upper_part_check/">Piston position on upper part - check Checking sequence

Engine 4 - Cyl. diesel engine (with unit injectors) Enginecrankshaft group, pistons Pistons and rods - disasemble and assemble / ston_position_on_upper_part_check/">Piston position on upper part - check Checking sequence

Engine
4 - Cyl. diesel engine (with unit injectors)
Enginecrankshaft group, pistons
Pistons and rods - disasemble and assemble / ston_position_on_upper_part_check/">Piston position on upper part - check
Checking sequence

Engine
4 - Cyl. diesel engine (with unit injectors)
Enginecrankshaft group, pistons
Pistons and rods - disasemble and assemble / ston_position_on_upper_part_check/">Piston position on upper part - check
Checking sequence