Spark plugs failing earlier than expected

[chall3ng3r]

Not long ago I replaced spark plugs in my Pajero Mini because old ones were all in pretty bad shape in just couple of years time. Now these Denso ones I put in are showing same signs of rough edges.

Two plugs mounted in center of engine are in better condition and were in ideal color on them, orange like, while other at front and rear had black oily carbon on them.

I cleaned all of them with petrol, and rotated thier positions when fixing back.

My question is, are they fake or low quality spark plugs? Because they show signs of rough edges quite early. They should at least give 20k KMs of life, and in my case both times I bought new ones, they start showing signs around 10k KMs or even earlier this time.

Should I try equivalent iridium ones next?

[margallar]

I think Karachi has the official dealer of NGK, Sir @capsat please guide

try copper plugs from them, also get a compression test and take a look at the coils.

and make sure the gap is right on the plugs.

[naveedakhtar7]

Also check the cover seals. Oil may be leaking from there.

[chall3ng3r]

I think Karachi has the official dealer of NGK, Sir @capsat please guide

try copper plugs from them, also get a compression test and take a look at the coils.

and make sure the gap is right on the plugs.

Coils are okay, gap seems to be okay as well.

Also check the cover seals. Oil may be leaking from there.

There's no oil consumption in engine, nor I noticed smoke in exhaust or any oil leak near plug mounts.

[capsat]

@margallar @chall3ng3r fairsale Tariq mohsin 0321 8250197 he sell genuine ignition related products

[chall3ng3r]

@margallar @chall3ng3r fairsale Tariq mohsin 0321 8250197 he sell genuine ignition related products

Thank you. I will contact him after Eid.

[chall3ng3r]

Update: Spark plugs for turbo-charged models are different. I was going through its Russian service manual and noticed that there were other part numbers mentioned for spark plugs as well, which previously I thought were for Pajero Jr. model.

I translated that part, found out I've been using wrong spark plugs in my Pajero Mini since last 4+ years of ownership . Because of that regular ones get damaged sooner.

As per official service manual, turbo-charged Pajero Mini needs NGK IKR7B or DENSO SXU22PR-A9, which are Iridium Spark Plugs. Going to get those next time I'm opening them for service.