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Lister SR3 Top End Decoke Gasket Set - Lister P/N 657-10776
High quality Lister SR3 three-cylinder engine De-coke or top gasket set, these aftermarket and genuine (when available) gaskets sets are equivalent to Lister P/N 657-10776. For air cooled 3-cylinder engines made between 1967 to 1976.
Genuine sets are new old stock and may show signs of long-term storage, all aftermarket sets are new.
Important Note: Please choose carefully, gasket sets that have been opened are non-refundable, unless we have sent you something that was incorrect. If you have any doubts about choosing the correct gasket set, please contact us with your engine number and we will check for you.
Decarbonising
The original manufacturer recommendations recommend that the SR3 is decarbonised after about every 1500 hours of run time, or sooner if engine shows loss of compression or blow-by past the piston, this decarbonising procedure will require the top end gasket set.
Basic Decarbonising Instructions
Decarbonise after about 1500 hours.
- Remove cylinder head(s).
- Remove piston(s) and rings.
All parts must be thoroughly cleaned and washed in paraffin (Kero)
Special care must be taken with regard to:-
- Recess in exhaust valve guide(s).
- Valve ports.
- Piston ring grooves.
- Combustion chamber(s) in top of the piston(s).
- Fins must be cleaned on cylinder(s), cylinder head(s) and injector sleeve(s). This is very important.
- The inside of the piston(s)
- Regrind valve seats if not in perfect condition.
- Clean out exhaust piping and silencer.
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