Infiniti S51-D owner manual Replacing Spark Plugs, Iridium-tipped spark plugs, AIR Cleaner

SDI2020

REPLACING SPARK PLUGS

If replacement is required, see an INFINITI dealer for servicing.

Iridium-tipped spark plugs

It is not necessary to replace the iridium- tipped spark plugs as frequently as the conventional type spark plugs since they will last much longer. Follow the main- tenance schedule in “INFINITI Service and Maintenance Guide”, but do not reuse them by cleaning or regapping.

Always replace spark plugs with recom- mended or equivalent ones.

8-20Maintenance and do-it-yourself

AIR CLEANER

SDI2033

Remove the retainers *1 as illustrated and pull out the filter element *2 .

The filter element should not be cleaned and reused. Replace it according to the maintenance intervals. See “INFINITI Ser- vice and Maintenance Guide” for mainte- nance intervals. When replacing the filter,

wipe the inside of the air cleaner housing and the cover with a damp cloth.

WARNING

.Operating the engine with the air cleaner removed can cause you or others to be burned. The air cleaner not only cleans the air, it stops flame if the engine backfires. If it isn’t there, and the engine backfires, you could be burned. Do not drive with the air cleaner removed, and be careful when working on the engine with the air cleaner removed.

.Never pour fuel into the throttle body or attempt to start the engine with the air cleaner removed. Doing so could result in serious injury.