Piston and Connecting Rod Service Flashcards
Before you can remove a piston you must…
check to see if there is a ridge at top of cylinder and remove it if there is one
When removing and dis-assembling piston assemblies you must ensure…
everything is marked in a way that it can be re-assembled the way it came apart
Unless otherwise stated piston pin snap rings should be installed…
with the gap towards bottom of skirt and the sharp side of snap ring facing out
Checking keystone ring groove side clearence
Keystone rings are not usually checked for side clearance with feeler gauge, but with a ring groove gauge
What are 3 methods for torquing connecting rod fasteners?
- Torque wrench
- Torque and Turn
- Bolt Stretch
When removing a piston it should be at:
Bottom dead center
Why is it necessary to remove cooling nozzles from some engines before piston removal?
Prevent it from being damaged
List the parts of a piston that should not be blasted
Ring grooves
Skirt
Piston pin bores
When scraping carbon from ring grooves care must be taken to ensure that:
Metal is not removed from the ring groove area
What would be the result of a piston installed with insufficient clearance between skirt and cylinder wall?
Scuffing, Scoring and eventual piston siezure
Why is bearing clearance necessary?
Allow for expansion and lubrication of the connecting rod journal and bearing
How should a piston ring be positioned in cylinder to measure end gap?
Push each piston ring squarely into an unworn area of cylinder bore
