190201c Engine Block and Cylinder Liner Service Flashcards
what should not be used to clean aluminum components
hot tank (caustic solution)
deck warpage should not exceed _________ in the length of the block?
0.004” (0.102 mm)
when pressure testing a cylinder block it should be immersed in hot water to?
allow the block to expand
main bearing bores should be measured to determine
out of round
taper
maximum inside diameter
main bearing bore misalignment should not exceed _______ of the minimum clearance specified for a new main bearing
one half (1/2)
what should be removed from the block when cleaning for over haul, in order to clean the oil and coolant passages
expansion plugs (frost plugs) threaded plugs
if the seal rings roll or twist on installation
could liner bore distortion
why would a de-glazing hone be used
restore the crosshatch
the crosshatch angle should be
40 to 60 degrees
when should the liner seals be lubricated
just before installation
majority of cylinder wear occurs
top of ring travel and 90 degree to ring travel
how would worn integrals cylinder’s would be repaired
boring to over size
(imperial - (0.010 0.020”, 0.030”)
S.I. (metric) - (0.25mm, 0.50mm, 0.75mm)
what could cause scoring in a liner
broken piston ring
foreign material between the piston and liner`
what is the minimum number of measurement on a liner to determine serviceability
4 - 90 degrees apart ( two at the top & two at the bottom)
liner flange thickness - (minus) counterbore depth = ?
liner height
when should liner height be checked
before and after installation
why do cylinders need to be de-glazed
restore the crosshatch
what cause scuffing in a liner
lack of lube
insufficient piston clearance
excessive heat
how should a cylinder be cleaned after honing or de-glazing
hot water , detergent
stiff brush
what causes cavitation on the major and minor trusts sides of a wet liner
implosion of air bubbles in the cooling system
what will change if the block deck was machine to correct warpage
Compression ratio
what’s the minimum amount of measurements that must be taken to determine cylinder out of round, taper and wear?
4 at 90 degree apart
must not vary more than 0.001”
Liner flange thickness - counterbore depth = ?
Liner height (protrusion)
the crosshatch angle can vary from _______ to ______ degrees?
40 to 60 degrees
what causes cavitation on the major and minor thrust sides of a wet cylinder liner?
implosion of vapor bubbles in the cooling system?
after honing or de-glazing cylinder bores , they should be thoroughly cleaned using?
hot water, detergent, stiff brush and lint free white rag
what causes Scuffing in the cylinder bore?
lack of lubrication, Insufficient piston clearance and excessive heat
why is a cylinder de-glazing hone used?
restore the crosshatch
both wet and dry liners will have a specific height. When should liner height be checked?
before removal and after installation
what will change if a block is machine to correct deck for flatness?
increase in compression ratio and position of the injectors
sealing rings on a wet liner that rolls or twists during installation can cause?
distortion of the liner bore
wet liner seals should be lubricated?
just before liner installation
the majority of cylinder wear occurs at?
top of ring travel, and 90 degrees to the crankshaft
centerline
if a dry liner has to much clearance it can be repaired by?
boring or honing the block for oversized liners
what cause scoring in a liner bore?
Broken ring, foreign material between the piston and cylinder wall
the purpose of the firewall on a cylinder liner is to?
reduce heat and pressure acting on the head gasket
when pressure testing a cylinder block it should be immersed in hot water to?
allow for expansion of the cylinder block before it pressured checked (block will close to operating temperature)
general rule main bearing bore misalignment should not exceed ________ of the minimum clearance specified for the new main bearing.
1/2 (one half)
What should be removed from the engine block when cleaning the block fro overhaul, so the passages can be cleaned and flushed thoroughly.
expansion plugs (frost plugs) thread plugs
