Checking Pistons And Cylinder Bores - Seat Leon 2013 Workshop Manual

León 2013 ➤ , León ST 2013 ➤
4-cylinder petrol engine (1.2 l direct injection, 4 V, turbocharger, EA211) - Edition 02.2017
– Take circlip out of piston pin boss.
– Drive out piston pin with drift - VW 222A- .
Installation
Installation is carried out in the reverse order. Please note the
following:
Note
Renew bolts that are tightened with specified further tightening
angle.
– Oil running surfaces of bearing shells.
– Install piston using commercially available piston ring clamp;
note installation position
– Install conrod bearing cap; note installation position
⇒ Item 2 (page 63) .
– Install cylinder head
– Install oil pan ⇒ page 130
Specified torques
♦ ⇒ "4.1 Assembly overview - pistons and conrods", page 63
4.3

Checking pistons and cylinder bores

Checking pistons
– Using a micrometer, measure approx. 10 mm from the lower
edge and perpendicular to the piston pin axis.
• Maximum deviation from nominal dimension: -0.04 mm.
Nominal dimension
•
1)
Dimension (thickness 0.015 mm on each side)
Measuring piston ring gap
– Insert piston ring at right angles from above into the lower cyl‐
inder opening approx. 15 mm from edge of cylinder.
– To check piston ring gap insert a commercially available feeler
gauge into the gap.
– Push in using a piston without piston rings.
Segment ring
compression ring
Oil scraping ring
66
Rep. gr.13 - Crankshaft group
⇒ page 64 .
⇒ page 72 .
.
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permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with
respect to the correctness of information in this document. Copyright by SEAT S.A.
Piston ∅ mm
70.92
New
mm
+ 0.15
0.20
+ 0.20
0.20
1)
Wear limit
mm
1.0
3.0