Disassembling And Assembling Pistons And Connecting Rod - Skoda Octavia Workshop Manual

13

Disassembling and assembling pistons and connecting rod

Note:
The engine should be attached with the engine
holder MP 1-202 to the repair stand for carrying
out removal and installation operations.
1 - Piston rings
♦ offset joints 120°
♦ use piston ring pliers for removing and
installing
♦ marking “TOP” must point toward pis-
ton crown
♦ oil scraper ring, 2-part or 3-part, mixed
lining is not admissible
♦ inspecting gap clearance ⇒ Fig. 1
♦ inspecting end clearance ⇒ Fig. 2
2 - Piston
♦ inspecting ⇒ Fig. 2
♦ mark installation position relative to
conrod and matching cylinder with
waterproof felt pen
♦ arrow on piston crown points toward
belt pulley side
♦ use piston ring tensioning strap for
installing
♦ piston = 80.965 mm
------------ 13-20 ------------
Crank Assembly
3 - Connecting rod
♦ always replace as a set
♦ mark matching cylinder see installa-
tion position -B-
markings -A- must be positioned one
above the other
♦ with oil drilling for lubricating piston pin
4 - Conrod bearing cap
♦ mark matching cylinder -B-
♦ installation position:
markings -A- must be positioned one
above the other
5 - 30 Nm + torque a further 90° (1/4 turn)
♦ replace
♦ oil thread and head contact surface
6 - Pressure relief valve, 27 Nm
♦ opens at:
0.25 to 0.32 MPa overpressure
♦ replace without sealant
7 - Oil spray nozzle
♦ for cooling piston
8 - Bearing shell
♦ pay attention to installation position
⇒ Fig. 3
♦ do not mix up used bearing shells
(mark)
♦ ensure tightly seated in the retaining
lugs
♦ axial play
new part: 0.1 to 0.35mm
wear limit: 0.37 mm
♦ with oil drilling for lubricating piston pin
9 - Cylinder block
♦ inspecting cylinder bore ⇒ Fig. 4
♦ cylinder
10 - Conrod
♦ replace together with nut -item 5-
11 - Circlip
12 - Piston pin
♦ if tight, heat piston to approx. 60°C
♦ use drift MP 3-400 for removing and
installing
= 81.01 mm
Edition 04.03
S00.5104.56.20
OCTAVIA