200 F3B ENGINE T RAKKER E URO 4/5 in - - Base q November 2006 Print 603.93.641 Figure 134 (Demonstration) 41032 eck the valve seats (2). If you find any slight scoring or ns, regrind them with a suitable tool (1) according to the les shown in Figure 133. If it is necessary to replace them, ng the same tool and taking care not to affect the cylinder d, remove as much material as possible from the valve ts so that, with a punch, it is possible to extract them from cylinder head. at the cylinder head to 80 100 C and, using a drift, fit the new valve seats (2), chilled beforehand in liquid ogen.
Using tool 99305019 (1), regrind the valve seats ording to the angles shown in Figure 133. er regrinding the valve seats, using tool 99370415 and dial ge 99395603, check that the position of the valves in tion to the plane of the cylinder head is: -0.45 -0.75 mm (recessing) intake valves -1.65 -1.95 mm (recessing) exhaust valves. hecking clearance between valve-stem and sociated valve guide ing a dial gauge with a magnetic base, check the clearance tween the valve stem and the associated guide. If the arance is too great, change the valve and, if necessary, the ve guide. 0667 Valve guides placing valve guides Figure 135 108838 e valve guides are removed with the drift 99360143.
ey are fitted with the drift 99360143 equipped with part 360296. Part 99360296 determines the exact position of assembly of the valve guides in the cylinder head. If they are not available, you need to drive the valve guides into the cylinder head so they protrude by 30.8 31.2 mm. After driving in the valve guides, rebore their holes with the smoother 99390330. 540613 Replacing injector holders Removal Figure 136 60619 To replace the injector holder (2), proceed as follows: - Thread the holder (2) with tool 99390804 (1). The steps described in Figs. 137 - 139 - 140 - 141 need to be carried out by fixing the tools, with the bracket A, to the cylinder head.