Adjusting Tappet Clearance Fig | Subaru Robin Power Products EY44-2

6)ADJUSTING TAPPET CLEARANCE (Fig. 6-3-5)

* Rotatecrankshaftuntiltappetis initslowest

position,hold valve downandinsertfeelergauge between valve andtappetstem.Theclearancefor both intake and exhaust, with engine cold.

0.13-0.17mm (0.0051”to 0 . 0067“)

*If clearance is less than specified, slightly grind valve stem and measure it again.

*If clearance is largerthanspecified,sink valve seat to adjust clearance.

*Afterclearanceadjustment,assemble valvesprings

and valve retainers,andsecurethem in placewith

retainerlocksChecktappetclearance.again for proper adjustment by turning crankshaft.

Detachcylinderbylooseningone8mmandfivelOmm

nuts.

In reassembly;

Fig. 6-3-5

Remove from upper surfaceof cylinder, carbon deposit

HOLDER

R I N G GUIDE

whichotherwisemaydamagepistonwhenpiston

moves. lnsertadoublingplatebetweenpistonskirtand

crankcase, and set piston to the cylinder center so that piston will not move easily. (Fig. 6-3-6).

Stagger the piston ring gaps 90° apart around piston. Apply oil to piston ring and cylinder walls sufficiently.

NOTE: Use new cylinder gasket.

5)Check if pistonmovessmoothlyafterreassembly. Clamping torque of cylinder is as shown below.

8mm nut 170-190 k g c m (12.3-13 . 7 ft-lbs.)

lOmmnut350-400kg-cm (25.3-29 ft-lbs.)

I ) Unscrew 6mmboltlocated just belowcrankshafton

drivingshaftside of mainbearingcoverand 8 pieces

bolts for mounting main bearing cover.

2)Aftersettingcrankshafttotheupperdeadpointof piston,inserta 4mm rodthrough6mmscrew hole t o fix crankshaft as shown in Fig. 6-3-7. Then, evenly tap

aroundtheperipheryofbearingcoverwithasoft

hammer until cover breaks free from crankcase.

CAUTION: BE CAREFULNOT TO DAMAGE OIL

. 1 ; :~ d

Fig. 6-3-6

MAIN BEARING COVER

Fig. 6-3-7

”1 4-