Subaru Robin Power Products EY33-2, EY44-2 manual Valve and Valvestemholeclearance, 0oss

In reassembly;

1)Cleancarbonandgumdepositsfromthe valves, seats,portsand valve stemholes.

2)Replace valves, if badly burned, pitted or warped.

3 )	Correctthe valve seatby using 45" seatcutter tool asillustratedin			Fig. 6 - 3 - 3 . Theseatshouldbe finished to
	1.2-1 S m m (.04-.05inch) in width.
4)	Cylinderblockshouldbereplaced	if valve	stemclearancebecomesexcessive'Referto.		Fig. ..-' 4 for
	clearance specifications and proper assembly.
5 ) Aftercorrecting valve seats, lap valves in place untilauniformring				will showentirelyaroundtheface		of the
	valve. Clean valves, andwashblockthoroughwith		a hotsolution	of soapandwater.	Wipecylinderwalls
	with clean lint free rags and light engine oil.

CAUTION: DO NOT ASSEMBLE VALVE SPRINGS ANDSPRINGRETAINERS AFTER ADJUSTING TAPPET CLEARANCE.

Fig. 6-3-3

I I

VALVE and VALVESTEMHOLECLEARANCE

A - VALVE FACE ANGLE		I	45"
B	- SEAT ANGLE		45"
		I				I
C	- GUIDE INSIDE DIA.		8 DIA.	+:.036	(::!;::)
		INTAKE	8 DIA.	-0 0 3 0	3168'
D - VALVE STEM DIA.				-0:oss	( : 3 1 3 r r )
					( ::fi::)
		EXHAUST	8 DIA.	;:1
MAXIMUMALLOWABLE		INTAKE	0.030-0.091 (.0012"-.0036")
CLEARANCE BETWEEN C a n d D		EXHAUST	0.090-0.146(.0035"-,0057")

Fig. 6-3-4

-1 3-