sparkplug reading help.

[safe]

I just changed my sparkplugs and they look like this:




The most interesting are number 3:



and number 5, looks like it been burning oil?:


The rest more or less looks like number 6:


They have been in the car for about 6000-6500 miles.
Any comments?

[safe]

Bump.

BTW, the car ran a lot sweeter with new plugs!

[dlagerstrom]

My understanding is that with today's liquid that passes for gas you can no longer tell what is going on by looking at plug colors. I would say that number 5 looks like it has been burning some oil. Do a search on Marvel Mystery Oil as I believe some have had success with this oil additive to 're-seat' rings and such reducing blow-by and putting off the dreaded engine rebuild.

Not an expert, just regurgatating what I have heard.

[Gunter]

Are these the right plugs for your engine?
They look like they are running a little too hot.
I would do a compression/leakdown because there is some evidence of burning oil.
Also, why is there so much gunk on the threads?
Do you torque the plugs with about 19-20 ft-lbs?

[safe]

I was recommended the NGK BP7, so that is what I used. The gunk may be anti seize, that I used at the time, no excessive amount.
Not sure what they was torqued to.

The new plugs are the same type of plug, had them on a shelf for a year, installed clean and torqued ~200 degrees, as shown on the back of the box.

Could the anti seize cause overheating of the plugs, or what was the reason for not using it?

[dlagerstrom]

Anti-sieze can act as insulation between the plug and the head. The plug needs a good ground to produce a nice spark.

Not sure what it would do to the plug, but it may explain your increased performance.

[911pcars]

Originally posted by dlagerstrom
Anti-sieze can act as insulation between the plug and the head. The plug needs a good ground to produce a nice spark.

Not sure what it would do to the plug, but it may explain your increased performance.

Yes. Too much could probably do that.

Don't slather it on. Apply A.S. equivalent to this O on clean threads. That should do it. The gasket seat should provide more than enough of a contact surface for an electrical ground path.

Sherwood

[safe]

I got new plugs now. I'm going to a track day on Sunday, so I'll be putting 4-500 miles on it this weekend.

I'll check my plugs again in 1000-1500 miles and see how they are doing.

My engine are euro 2.7 with 112k miles on it, no rebuild, it might need a top end soon.

[Kroggers]

Good luck on Sunday Magnus. What track is it?

[safe]

Thanks Pål!
Mantorp with PCS.

Your car isn't ready for the road/track yet?

[Kroggers]

No, my car is still has a long way to go

[Gunter]

safe:
I see a piece of insulator missing on #5.
Check what Porsche recommends.
NGK BP7 may be a little too hot for your 2.7.
I have a feeling that NGK BP6 may be a better plug for you.
Anti-seize is good, use very little and do not put any on the lower 2 threads.