Download operators maintenance & overhaul

CAUTION:
Whn r placing guides do not ream
sincetheseare all pre-reamed
beforeb ing ferrox
coated--any further reamingwill removethe
coating.
SEE TTP10148
FOR ADDITIONAL
Cleaning
INFORMATION
Combustion Pocket
Clean insert and combustion pocket. Inspect
carefully for cracks.
VALVESEAT INSERTS
4. Removeall carbon from combustion areas
using scraper and wire brush.
Thevalve seat inserts are held in place by a
shrinkfit.
5. Clean the cylinder head thoroughly with a
solvent or degreasingsolution and blow it off with
air pressure,Inspect carefully for cracks,
Inspect all valve inserts in the head and
replace any that are loose, cracked or otherwise damaged.Use puller for removingfaulty
insert.
VALVEGUIDES
1. Clean the valve stem guides, removing lac*
quer or other deposits. Do not use tools that
removemetal.
2. Checkguides for wear by using a telescope
gaugeand 1" micrometer. Replaceall guides that
are worn bell-mouthed or have increased 0.038mm
(.0015) in diameter. SeeLimits and ClearanceSection for maximum
diameter permissible to determine actual amountit has increased. Remove
all
valve guides when necessary by pressing them
out from the combustion chamberside.
3. Replaceworn guides as required by pressing
in newguides to the correct depth as given in the
valve guide data (TTP10148,
page42).
Whenrequired to replace with new insert,
clean and counterbore for 0.25mm(o010")
larger insert using cotmterboretool with correct fitting pilot.
Whenmachining the counterbore, be sure
to go deep enoughwith the tool to clean up
the bottom so that the insert will have full
contact to carry awaythe heat.
Continental does not recommend
installing
newinserts having the sameoutside diameter
as the one removed.
Newinsert installation musthave a press fit.
Chill insert in containerwith dry ice for 20 minutes
before assembling.
Insert maythen be installed in the counterbore
using a piloted driver and arbor press, without the
possibility
of shearing the side walls. This
assures it being seated firmly on the bottom of
the counterbore.
Removing Valve Guides from Combustion Chamber Side
3. Grindthe intake andexhaust
valveseatsin the head
in accordance
with instructions in the ValveGuideData
(TTP10148,page 42). Before removing the arbor,
indicatethe seat. Total indicator readingof the run-out
mustnot be morethan 0.05mm
(.002"). Use a pilot
havinga solid stemwith a longtaper, as all valveseats
mustbe groundconcentricandsquarewith either new
or wornvalve stemguideholes.