SPARK PLUGS

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SPARK PLUG ; Alternatives

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If you have normal carbon resistor HT leads , I would recommend that you change your resistor spark plugs for non resistor type .

For example if you use NGK BPR5ES change them for BP5ES .

In fact even better would be to use the smaller hex non resistor spark plug ; NGK BCP5ES as per article below ;

SPARK PLUG SOCKET SIZE ;

I would recommend changing the plugs to the smaller hex plug socket size {10mm} as it makes removal easier at cylinder numbers 1 and 2 at the distributor .

For example , if you have the " Normal " type NGK spark plug number BP5ES , change them for BCP5ES where C signifies that it has the smaller hex .

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A "Normal" plug for the Reliant has a 14mm thread diameter going into the head and the socket size is 21mm ;

This uses the 14mm spark plug removal tool /socket

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The Smaller head size spark plug also has a 14mm thread diameter going into the head but the socket size is 16mm { 5/8 inch }.

This uses the 10mm spark plug removal tool /socket

To sum up ;

"Normal" spark plugs need a 14mm spark plug removal tool /socket

"Small Hex" spark plugs need a 10mm spark plug removal tool /socket

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SPARK PLUG ;

Meaning of the DENSO , NGK , CHAMPION spark plug letters / numbers

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SPARK PLUG ; How to read a Spark Plug Firing End

How to read a Spark Plug Firing End ; Link 1

How to read a Spark Plug Firing End ; Link 2

How to read a Spark Plug Firing End ; Link 3

How to read a Spark Plug Firing End ; Link 4

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Please inform me of any mistakes I have made or if you have further information .