Odes Industry UTV170-10 - Engine Service and Overhaul; Cylinder Head Service Procedures

3.ENGINE
3-2
2.Remove：
Remove the bolts of the cylinder head head“1-4”
3.Loosen:
·Timing chain tensioner cap bolt.
4.Remove :
·Timing chain tensioner (along with the gasket)
·Camshaft sprocket
·Timing chain
TIP
To prevent the timing chain from falling into the crankcase，
fasten it with a wire.
5.Remove:
·Cylinder head
TIP
·Loosen the bolts and nut in the proper sequence as show.
Loosen each bolt and nut 1/2of a turn at a time.After bolt No.1and nut No.3-6 are fully loosened，remove them.
CHECKING THE CYLINDER HEAD
1.Eliminate：
·Combustion chamber carbon deposits
（with a rounder scraper）
TIP
Do not use a sharp instrument to avoid damaging or scratching.
·Spark plug bore threads
·Valve seats
2.Check：
·Cylinder head
Damage/scratches→Replace.
3.Measure：
·Cylinder head warpage.
Out of specification→resurface the cylinder head.
CHECK THE TIMING CHAIN TENSIONER
1.Check：
·Timing chain tensioner
Cracks/damage→Replace.
2.Check：
·One-way cam operation
Rough movement→Replace the timing.
3.Check：
·Timing chain tensioner cap bolt“1”
·O -ring“2”
·Timing chain tensioner gasket“3”
·Timing chain tensioner rod“4”
Damage/wear→Replace the defective part（s）
1
2
4
3
1
2
6
5
4
2
4
3
1