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Bad platinum plugs after 27,000 miles?? Or...?

posted by  Amarin on  Wed Feb 12 19:09 CST 2014
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last visit: Thu Oct 23 22:42 CST 2014
[RELATED]

Hello,

I have similar issues for Bosch platinum plugs. They installed great runs great but didn't last according to advertised claims. My take is that the platinum electrode is fitted flush with the porcelain centre part. The platinum tip is very small in diameter, about half a millimetre or less. Slight fouling on the tip would obscure that part causing weak spark performance. Some engines runs great with platinums but not our redblocks.

If you prefer high performance plugs, choose the ones with exposed metal electrodes such as the Iridiums and others similar. For me I would stick to copper plugs all the time.

Thread locking compounds are not commonly used during plugs installation. It may hinder the electrical grounding contacts for the plugs. Anti-seize is occasionally used instead but you must ease up a bit on the torque as anti-seize lubricates the plug threads. Anti-seize contains some copper and aluminium flakes which didn't interfere with electrical contacts as much. The best is to install the plugs dry.

Regards,

Amarin.





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