Inspect Cylinder Head Components; Inspect Push Rods (All Models); Inspect Head For Distortion (All Models); Inspect Valve Guide Inner Diameter (All Models) - Briggs & Stratton Vanguard 05000 Manual

INSPECT CYLINDER HEAD
COMPONENTS

Inspect Push Rods (All Models)

Check pushrods for straightness as shown in
Fig. 11.
Fig. 11
Replace if bent.
Inspect Head For Distortion (All
Models)
1. Clean the mating surface of the cylinder
head.
2. Using a straight edge that extends across
both sides of the cylinder head mating
surfaces:
• Check that the straight edge comes in
contact with the entire mating surface
area of the head.
• Move the straight edge to various different
positions on the mating surface.
• If equal contact is made in all positions, the
mating surface is good (Fig.
Fig. 12
3. If an area is questionable, use a feeler
For reject dimensio ns, see SECTION 14-
ENGINE SPECIFICATIONS.
If the allowable distortion limit is exceeded:
• Replace the cylinder head and/or cyl inder
Inspect Valve Guide Inner Diameter
(All Models)
For 28Q700:
1. Measure intake and exhaust valve guides
12).
• Replace cylinder head if the flat end of the
If plug gauge is not available:
• Measure valve guides and compare with
gauge to measure the amount of
distortion as shown in Fig. 13.
Fig. 13
block.
with Valve Guide Plug Gauge
gauge can enter guide 1/4 in. (6.35 mm)
or more.
listed reject dimensions. See SECTION
14- ENGINE SPECIFICATIONS.
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