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Denso spark plug


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Anybody knows the differences between k20r-u11 and k20pr-u11? I bought the former but realise my manual says the latter. is it ok to use?

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Turbocharged
(edited)

This is how my normal Denso spark plug looks like after just 3000km. A lot of white deposit on the bottom one.

 

What is wrong? Can still use?

post-27974-0-55284700-1401277555_thumb.jpg

Edited by Vinceng
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This is how my normal Denso spark plug looks like after just 3000km. A lot of white deposit on the bottom one.

 

What is wrong? Can still use?

This is a sign of water corrision from the top(gap between plug connector and engine). Not due to coolant doesn't affect your engine combustion chamber. Did you remove the engine cover ? If you did, do consider putting it back.

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Turbocharged
(edited)

I did not remove engine cover. Spark plugs are located behind yellow engine oil dip stick and below black air filter cover.

 

How can water sip in?

post-27974-0-84591900-1401282616_thumb.jpg

Edited by Vinceng
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Turbocharged

Oops. Actually there is no engine cover.

 

Air filter located above engine block.

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