Cylinder head(s)
- Make
- Fiat
- Model
- 500 Factory Service Manual
- Year
- 2007–2024
- Section
- Engine › Cylinder head(s)
Manufacturing data and tolerancesCylinder head(s)
CYLINDER HEAD(S)
| Measurement | Value | Validity |
|---|---|---|
| Misalignment between cylinder head extension - cylinder head (mm) | 0.10 | 1.3 Mjet |
| Inlet valve stem diameter | 4.982 ÷ 5.000 | 1.2 8V |
| Exhaust valve stem diameter | 4.974 ÷ 4.992 | 1.2 8V |
| Inlet mushroom valve diameter (mm) | 33.10 ÷ 33.30 | 1.2 8V |
| Exhaust mushroom valve diameter (mm) | 27.80 ÷ 28.10 | 1.2 8V |
| Valve spring free length (mm) | 42.29 | 1.2 8V |
| Length of valve springs under a load of 15.5 daN (mm) | 35.10 | 1.2 8V |
| Length of valve springs under a load of 39 daN (mm) | 26.30 | 1.2 8V |
| Camshaft bearing diameter - First bearing (mm) | 24.000 ÷ 24.015 | 1.2 8V |
| Camshaft bearing diameter - Second bearing (mm) | 23.500 ÷ 23.515 | 1.2 8V |
| Camshaft bearing diameter - Third bearing (mm) | 30.992 ÷ 31.008 | 1.2 8V |
| Nominal camshaft cam lift (mm) | 9.5 | 1.2 8V |
| Tappet sleeve outer diameter (mm) | 34.975 ÷ 34.995 | 1.2 8V |
| Tappet sleeve seat diameter (mm) | 35.015 ÷ 35.030 | 1.2 8V |
| Valve guide diameter (mm) | 9.959 ÷ 9.981 | 1.2 8V 1.4 16V |
| Valve guide outer diameter (mm) | 10.010 ÷ 10.030 | T.i.T |
| Interference between valve guides and valve guide seats (mm) | 0.029 ÷ 0.071 | 1.2 8V 1.4 16V |
| Valve guide inner diameter (mm) | 5.022 ÷ 5.040 | 1.2 8V |
| Inlet valve/valve guide clearance (mm) | 0.022 ÷ 0.058 | 1.2 8V 1.4 16V |
| Valve/valve guide clearance - exhaust (mm) | 0.030 ÷ 0.066 | 1.2 8V 1.4 16V |
| Minimum permitted cylinder head height (mm) | 126.5 ± 0.1 | 1.2 8V |
| Camshaft end float (mm) | 0.15 ÷ 0.34 | 1.3 Mjet |
| Cylinder head lower support surface flatness (mm) | 0.1 | 1.3 Mjet |
| Cylinder head nominal height (mm) | 105.5 ± 0.05 | 1.3 Mjet |
| Valve stem/inlet valve diameter - exhaust (mm) | 5.90 ± 5.94 | 1.3 Mjet |
| Valve spring free length (mm) | 37.9 | 1.3 Mjet |
| Length of valve springs under a load of 16.2 - 18.0 daN (mm) | 31.0 | 1.3 Mjet |
| Length of valve springs under a load of 36.1 - 39.5 daN (mm) | 23.5 | 1.3 Mjet |
| Camshaft bearing diameter - First bearing (mm) | 38.500 ÷ 38.515 | 1.3 Mjet |
| Camshaft bearing diameter - Second bearing (mm) | 38.000 ÷ 38.015 | 1.3 Mjet |
| Camshaft bearing diameter - Third bearing (mm) | 30.000 ÷ 30.015 | 1.3 Mjet |
| Nominal inlet cam lift (mm) | 6.4 | 1.3 Mjet |
| Nominal exhaust cam lift (mm) | 7.5 | 1.3 Mjet |
| Camshaft support diameter - First support | 38.545 ÷ 38.570 | 1.3 Mjet |
| Camshaft support diameter - Second support | 38.045 ÷ 38.070 | 1.3 Mjet |
| Camshaft support diameter - Third support | 30.045 ÷ 30.070 | 1.3 Mjet |
| Valve seat band angle in contact with valve | 45° ± 20'' | 1.3 Mjet |
| Valve guide outer diameter oversize | 0.05 / 0.10 / 0.25 | 1.3 Mjet 1.4 16V |
| Valve guide inner diameter (mm) | 6.020 ÷ 6.038 | 1.3 Mjet |
| Cylinder head lower surface flatness (mm) | 0.1 | 1.3 Mjet |
| Cylinder head nominal height (mm) | 105.5 ± 0.05 | 1.3 Mjet |
| Cylinder head height (factory value) (mm) | 77 ± 0.2 | 1.4 16V |
| Combustion chamber volume (cc) | 14 | 1.4 16V |
| Inlet valve stem diameter | 5.982 ÷ 6.000 | 1.4 16V |
| Exhaust valve stem diameter | 5.974 ÷ 5.992 | 1.4 16V |
| Inlet valve outer diameter | 27.020 ÷ 27.050 | 1.4 16V |
| Inlet valve inner diameter | 22.520 ÷ 22.550 | 1.4 16V |
| Valve guide inner diameter (mm) | 6.022 ÷ 6.040 | 1.4 16V |
| Valve/valve guide clearance - intake (mm) | 0.022 ÷ 0.058 | 1.4 16V |
| Valve/valve guide clearance - exhaust (mm) | 0.030 ÷ 0.066 | 1.4 16V |
| Valve spring height released (mm) | 46.9 | 1.4 16V |
| Length of valve springs under a load of 14.9 - 16.5 daN (mm) | 37.52 | 1.4 16V |
| Length of valve springs under a load of 31.1 - 34.1 daN (mm) | 30.0 | 1.4 16V |
Parts & tools for this job For 2007 Fiat 500
- PARTEngine gasket setSearch: Fiat 500 2007 engine gasket set
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- TOOLFeeler gauge setSearch: feeler gauge set
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