Part 5 - Piston rings

Explanation: Carbon = A mixture of unburned hydro-carbons, residues of burned lube oil and ashes. The reason for the formation of carbon, respectively carbon deposits has been described already in Part 4 - §4.3.1 of our article series.

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If the amount of carbon is too high, it will clog the ring grooves step by step. Due to the transferred heat from the piston crown a compound - hard as stone - will be formed and the piston ring is sticking in his groove.
Now the piston ring cannot move/rotate anymore, will be overloaded at certain areas ...and propably break finally.

Prevention against carbon deposits caused by insufficient lube oil treatment

The lube oil in a power plant- or marine Diesel engine engine has a couple of specific "enemies" - beneath others:

• Carbon from the combustion process and residues of burned lube oil
  
  
• Water from the intake air
  
  
• Water which is produced during the burning process
  
  
• Sulphuric acid whichis formed out of the sulphurous acid

These are transferred into the lube oil on the surface of cylinder liner. If the concentration of these is too high the oil film on the liner will be affected and the particles are accumulated in the piston ring grooves. The movement of the piston rings in the ring grooves will be disturbed by these deposits and at the end of the day the rings will stick in the ring grooves....Game over !

Correct lube oil treatment in order to prevent sticking piston rings

Contact us to discuss your requirements of Motorcycle Piston Rings Suppliers. Our experienced sales team can help you identify the options that best suit your needs.

• Continuous operation of the lube oil separators,
  even if the engine is not running for a short time
  
  
• Separation temperature 95°C
  
  
• Lube oil automatic filter in function with sound candles
  
  
• Lube oil analysis on a regular base

We had a brand new 27.5Kva generator delivered and the man in charge could not wait to start it up.

This genny is air start but of course it had no air in the tank until it had been started. It was started with the attached starting handle and the air pump engaged and then when 600lb was in the tank the engine was switched down. Later it was started up again using the air start motor which made a funny noise but no one took notice. At that point I started a service of the machine and found no oil in the air start motor. Decided to strip it and found one piston with a broken ring so decided to make another as there was no chance of spares.

I found one of those racking base stands and gave it a rub with a file and it seemed soft enough so turned up a new ring and split it and heated it up and then put it on the piston and re-assembled the motor. Remembering to put oil in as well ! Started up again with no funny noise and as far as I know still going strong.

clive