Engines — Mechanical Specifications — 1.4 and 1.6 Liter Engines (Peugeot 306)

Table of contents: Cylinder head 🠇 Valve seats 🠇 Camshaft 🠇 Pistons and connecting rods 🠇 Connecting rods and connecting rod…🠇 Crankshaft and flywheel 🠇 Main journal diameter - all engines: 🠇 Connecting rods 🠇

Cylinder head

Material - Aluminum

Cylinder head height: 111.20±0.08 mm

Cylinder head height marked "R" - minimum permissible cylinder head height 111.00 mm

The maximum permissible cylinder head tilt is 0.05 mm

Cylinder head gasket thickness - normal - 1.20 mm
Cylinder head gasket thickness - ground head - 1.40 mm
Cylinder head gasket thickness - marked "R" - 1.40 mm

Gasket Marking - See TU Engine Section

Valve guides:

Nominal outside diameter: 13.02 mm
1st repair size, 1 groove - 13.29 mm
2nd repair size, 2 grooves - 13.59 mm

Guide bushing hole: 7.0 mm + 0.022 mm

Length of guide bushings: 47.5±0.3 mm

Cylinder head bore diameter:

Nominal diameter: 12.965 mm + 0.032 mm
1st repair size - 13.195 mm + 0.032 mm
2nd repair size - 13.495 mm + 0.032 mm

Valve seats

Valve seat angle:

Inlet valves - 60° (full angle 120°)
Exhaust valves - 45° (full angle 90°)

Valve seat width:

Intake valves - 1.45 mm
Exhaust valves - 1.80 mm

Valves:

Valve head diameter:

Intake valves - 38.60 mm
Exhaust valves - 29.40 mm

Overall length:

Intake valves - 112.76 mm
Exhaust valves - 112.56 mm

Valve stem diameter:

Intake valves - 6.99 - 0.01 mm
Exhaust valves - 6.98-0.01 mm

The maximum permissible grinding of the valve stem end is 0.20 mm

The minimum permissible thickness of the valve edge is 0.50 mm

Valve guide clearances:

Inlet valves - 0.02 - 0.042 mm
Exhaust valves - 0.04 - 0.060 mm
Maximum working clearance: 0.10 mm

Valve springs:

The spring wire diameter is 3.6 mm or 4.2 mm

Spring markings - Intake and exhaust valve springs are identical

Camshaft

Number of bearings - 5
Axial clearance of the camshaft 0.07 - 0.13 mm
Maximum clearance - 0.16 mm

Pistons and connecting rods

Installation of piston pins - Floating fit in the piston and press fit in the connecting rod bore.

Direction of piston installation - The arrow on the bottom of the housing must point towards the timing drive.

Piston rings:

Number of rings - 3
Ring design - 1 regular compression ring, 1 trapezoidal ring, 1 oil-deflecting ring

Piston ring thickness:

top ring - 1.75 mm
middle ring - 2.00 mm
oil deflector ring - 3.00 mm

Piston ring joint clearances:

the rings are supplied adjusted, the adjustment does not change the nominal dimensions - compression rings 0.30 - 0.50 mm
middle upper compression ring - 0.40 - 0.55 mm
oil deflector ring - 0.25 - 0.40 mm

Piston pin hole:

piston marking "1" - 19.505 - 19.505 mm
piston marking "2" - 19.505 - 19.508 mm
piston marking "3" - 19.508 - 19.511 mm

Piston pin bore diameter:

piston pin markings - 19.489 - 19.492 mm (packaging with red markings)
piston pin markings - 19.492 - 19.495 mm (packaging with white markings)
piston pin markings - 19.495 - 19.498 mm (packaging with blue markings)

Piston pin length: 62,000 mm
Piston pin diameter: 23.00 mm

Piston diameter:	1.4 liter engine	1.6-liter engine
class A	74.95 - 74.96 mm	75.75 - 75.76 mm
class B	74.96 - 74.97 mm	75.76 - 74.78 mm
class C	74.97 - 74.98 mm	74.77 - 74.78 mm

Oversized pistons — +0.10 mm (class 3) or 0.40 mm (class 3). 0.01 (class A), 0.02 (class B), and 0.03 (class C) mm larger than the nominal diameter.

Piston clearance: 0.04–0.06 mm

Connecting rods and connecting rod bearings

Design - Conventional bearing shells
Material - Aluminum-zinc alloy
Connecting Rod Bearing Journal Diameter - See "Crankshaft"
Pin hole diameter: 19.664635 + 0.013 mm
Bearing bore diameter: 48.665 + 0.016 mm
The length of the connecting rod between the centers of the holes is 126.8 mm (1.4-liter engine)

Crankshaft and flywheel

Number of bearings - 5

Main bearing shell design - Conventional bearing shells, without lubrication grooves

Material - Aluminum-zinc alloy

Crankshaft axial play: 0.07–0.272 mm

Thickness of expansion washers: