35
Repair instructions
2
Clean all components, be especially careful with the
oil and coolant galleries.
Remove any remaining soot and contamination from
the cylinder head mating surfaces. Clean the sealing
grooves with a suitable scraper (shaped to conform
with the contours of the grooves).
NOTE! Never pass a rotating steel brush or other tool
across the sealing grooves. The lands would then be
broken down and ruined.
Assembly
3
Clean the core plugs if they have been removed.
Clean the core plug seats.
Use Permatex® No. 3 or Volvo Penta 1161099-5 seal-
ant.
Install the plug by means of a mandrel or sleeve.
4
Oil the valve stems and install the valves in their
guides.
NOTE! Observe the markings, to ensure that the
valves go back to their original locations.
5
Install the valve spring(s) and valve collar, and press
the spring(s) together with the valve spring compres-
sor. Install the collets and a new valve stem seal.
Cylinder head, leakage check
Special tools: 9996662, 9996852
6(x) series 9998114 (2 no.), 7(x) series 9998115
(2 no.)
WARNING! Before using proof testing
equipment no. 9996662, it must be checked. Al-
ways observe the applicable safety
instructions.
1
Connect the proof testing equipment to the com-
pressed air mains and set the pressure gauge to
100 kPa (1 kp/cm
2
), using the reduction valve.
NOTE! The reduction valve knob can be locked with a
lock ring which is moved along the spindle.
2
Then close the shut-off tap. During 2 minutes, the
pressure on the pressure gauge must not fall, for the
proof testing equipment to be regarded as being reli-
able.
3
Attach air connection plate 9996852, using two M10
screws and seal plates 9998114 (6x series) or
9998115 (7x series), using twelve M10x120 mm
screws and nuts.
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