Valve clearance

[Shenpalio2000]

On all Fiat overhead cam engines which use bucket followers and shims then almost without exception the valve clearances should be:

0.50mm +/- 0.05mm - EXHUAST
0.40mm +/- 0.05mm - INLET

Having said this for some cars with higher lift cams (espcially the higher performance twin cam engines) the above valve clearances can make the engine very "tappety"/noisey.

To reduce the tappet noise it is normal to drop the valve clearance figures down.

This is typically done in stages.

Exhaust - 0.45 +/- 0.05mm
Inlet - 0.35 +/- 0.05mm

At NO time should clearances be set lower than

0.40 mm for Exhaust
0.35 mm for Inlet

These lowest set values will allow for a good 12,000 miles of running without too much risk of valve recession taking the running clearance too low.

Found that its typed inlet 0.30mm ±0.5mm
Outlet 0.40mm ±0.5mm
That for fiat punto engine 188e2000,also palio 178e2000

 

[Mike1alike]

This one is a little bit old thread.
But it's good to know. Thank you for sharing!