Checking Valve Clearances - Perkins 4.10SM Handbook

then tighten by hand as per instructions on canister. Where a tocl is available,
tighten to 15 Ibf ft (2,07 kgf m) or 20 Nm .
7. Run engine and check for leaks.
8.
After the engine has been run and the filter assembly checked for ieaks, restore
oil in sump to its correct level.
Oil Coolers
Under normal circumstances, oil coolers will require little attention, providing the
sea water inlet strainer is efficient and kept clean .
After a lengthy period of service it may be necessary to clean the tube stack and
this may be effected in a similar manner to that given for the heat exchanger.
checking valve clearances (fig. 17)
This is set between the top of the valve stem and rocker arm and should be 0.012
in (0,30 mm) cold.
When setting valve clearances the following procedure should be adopted : -
1. With the valves rocking on No.4 cyiinder (i.e . the period between the opening
of the inlet valve and the closing of the exhaust valve), set the valve clearances
on No . 1 cylinder.
2.
With the valves rocking on No. 2 cylinder, set the valve clearances on .No
.
3
cylinder.
3.
With the valves rocking on No. 1 cylinder, set the valve clearances on No. 4
cylinder.
4. With the valves rocking on No. 3 cylinder, set the valve clearances on No.2
cylinder.
Note. When turning engines, they should always be turned in their normal direction
of rotation, i.e., anti-clockwise when viewing from the gearbox end.
Fig. 17
37