Pull top collar tightly against keepers to seat keepers in collar.
Install bottom collar, valve guide seal, top collar and valve keepers. Lubricate valve stem and install valve in guide. Using following procedure, determine installed spring height and clearance between top collar and valve guide. If necessary, machine lower collar and/or spring pocket to obtain minimum clearance of. Collar must rest flat on head and spring coils must not contact sides of spring pocket in head. Place lower spring collar in valve spring pocket in head. Refer to appropriate service manual or consult professional mechanic as needed. If cylinder heads/valves are to be reconditioned, proceed according to standard procedure at this time. If applicable, remove cylinder heads from engine and disassemble. 90-2079 and 90-2080 utilize flat middle spring. NOTE - S&S valve spring kits 90-2079, 90-2080 and 90-2081 feature triple valve springs. Mixing valves, springs, collars, keepers or other parts from different valve spring kits can cause extensive engine damage which is also the responsibility of the installer. Improper assembly including failure to establish proper measurements and clearances can cause extensive engine damage which is solely the responsibility of the installer. All kits are compatible with S&S 90-2013 (intake) and 90-2012 (exhaust) valves supplied with Special Application heads.īecause of special assembly procedures required with high-lift camshafts and related parts, S&S recommends that these parts be installed by a professional mechanic having considerable experience with parts of this nature. ” diameter valves and supplied titanium collars or exact Kits are designed for “no shoulder” valve guides.
It remains the engine builder’s responsibility to confirm all measurements and clearances during installation. See following paragraph for part numbers. NOTE - Kit 90-2079 is a “bolt-in” installation for earlier S&S street heads equipped with. These kits are intended primarily for use on S&S Special Application heads.660-lift kit 90-2079 can also be used on S&S Street Heads normally supplied on S&S engines, or any other head which can accept a 1.650” outer spring O.D. Valve spring and collar kits 90-2079, 90-2080 and 90-2081 areĭesigned for street and race applications that utilize camshafts with extremely high lifts requiring higher than normal spring pressures.
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