Cylinder Head Measurement; Camshaft Journal Clearance - Suzuki XL7 2007 Service Manual

1D-180 Engine Mechanical:
2. If any of the above conditions exist on the camshaft
bearing surfaces, replace the cylinder head.
3. Inspect the cylinder head for the following:
– Cracks, damage or pitting in the combustion
chambers
– Debris in the oil galleries — Continue to clean the
galleries until all debris is removed.
– Coolant leaks or damage to the deck face sealing
surface — If coolant leaks are present, measure
the surface warpage as described under Cylinder
Head Measurement - Deck Flatness Inspection.
– Burrs or any defects that would degrade the
sealing of the NEW secondary camshaft drive
chain tensioner gasket
– Damage to any gasket surfaces
– Damage to any threaded bolt holes
– Burnt or eroded areas in the combustion chamber
– Cracks in the exhaust ports and combustion
chambers
– External cracks in the water passages
– Restrictions in the intake or exhaust passages
– Restrictions in the cooling system passages
– Rusted, damaged or leaking core plugs
4. If the cylinder head is cracked or damaged, it must
be replaced. No welding or patching of the cylinder
head is recommended.
5. Inspect the camshaft position actuator oil feed check
valves in order to ensure they are properly
positioned in the cylinder head. The camshaft
position actuator oil feed check valve should be flush
to 2 mm (0.0787 in) below the cylinder head deck
surface (a).
6. Damaged, restricted or clogged check valves can be
replaced using the EN 46122.

Cylinder Head Measurement

Camshaft Journal Clearance

1. Install the camshaft bearing cap in the cylinder head
without the camshaft.
CAUTION
!
Refer to "Fastener Notice: ".
2. Install the camshaft cap bolts.
Tightening torque
Tighten the camshaft cap bolts to 10 N⋅m (89 lb
in).
3. Measure the camshaft bearings using an inside
micrometer.
4. Subtract the camshaft journal diameter from the
camshaft bearing diameter. This will provide the
running clearance. If the running clearance exceeds
specifications and the camshaft journals are within
specification, replace the cylinder head.
Camshaft Journal Alignment
1. Ensure the camshafts are serviceable.
2. Inspect the cylinder head camshaft bearing surfaces
for any imperfections or scratches that could inhibit
proper camshaft clearances. Repair minor
imperfections or scratches.
3. Install the camshafts in the cylinder head.
4. Install the camshaft bearing caps.
5. Install the camshaft cap bolts.
Tightening torque
Tighten the camshaft cap bolts to 10 N⋅m (89 lb
in).
6. Ensure the camshafts spin freely in the cylinder
head. If the camshaft does not run freely, replace the
cylinder head.