Install Valves
Install Cylinder Head
1.
Valve stems and guides must be free of foreign material
and burrs or valve sticking will occur and valve stem seals
will be damaged.
Note: Do not use sealer of any kind on gaskets.
1.
2.
3.
Coat threads of cylinder head screws with Briggs &
Stratton Part #93963, Valve Guide Lubricant.
2.
Lightly coat valve stems with Briggs & Stratton Part
#93963, Valve Guide Lubricant, and install in valve
guides.
Place new cylinder head gasket on cylinder headpins and
then install cylinder head and cylinder head screws.
Torque screws as listed in Table No. 3, Page 32 in
sequence that cylinder head screws are numbered on
cylinder head, or as shown in Fig. 57.
3.
4.
Oil inside diameter of valve stem seal with engine oil and
install on intake valve stem.
Slide seal down against head plate or cylinder head.
It is recommended that cylinder heads be torqued in three
(3) steps to a final torque of 220 in. lbs. (24.9Nm):
Note: Be sure Briggs & Stratton Part #93963, Valve Guide
Lubricant, is not on valve face, valve seat, or exposed end of
valve stem.
First step 75 in. lbs. (9.0Nm)
Second step 150 in. lbs. (17.0Nm)
Final step 220 in. lbs. (25.0Nm).
Install Valve Springs and Retainers
1.
Place a shop rag or wood blocks on work surface to
support valves. Place cylinder head on rag or blocks and
install valve spring over valve stem. Place spring and
retainer on valve stems, Fig. 55.
Torque screws evenly per number sequence in Fig. 57.
Note: Do not torque one screw down completely before the
others, as it may cause a warped cylinder head.
2
4
1
3
Fig. 55 – Valve Spring and Retainer
Fig. 57 – Torque Pattern, Cylinder Heads
2.
3.
Place retainer on spring and with thumbs on retainer press
on retainer to compress spring.
Install Rocker Arms—Current Style
Compress spring until valve stem extends through large
end of retainer slot. Continue to press until small end of
slot can slide into groove on valve stem. Be sure retainer is
fully engaged in valve stem groove, Fig. 56.
1.
Install and torque two (2) rocker arm studs to 130 in. lbs.
(15.0Nm), Fig. 58.
1
1
Fig. 58 – Installing Rocker Arm Studs
Fig. 56 – Installing Valve Retainers
1.
Rocker arm stud: torque to 130 in. lbs. (15.0Nm)
1.
Valve retainer
Compression
30
GTS 200
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| Tags | Toro GTS 200 |
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| Language | English |
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