You bite your nails too huh?
Having just re-ringed a saturn, I know what oily crusty plugs look like.
quote:The Audi 4 valve engine uses different plugs. This is for a 2v engine.
Are the rounded tips how they come from the box or do they wear that way? [QUOTE] They come that way. [QUOTE] I rather like the plug design, gets the spark down to see some fuel/air mix rather directly. Probably works best in a 4-valve cylinder where it can be centrally located.
To photograph spark plugs, lighting is everything, particularly getting it down between the shell and the insulator. Nicely done with good side lighting to get the deposits.
quote:I've seen slow migration on plugs as FP appears to not remove intake deposits "enmass" like more draconian agents. I would imagine, valve seal contributions excluded, that this would pass eventually ..unless intake deposit formation exceeded intake cleaning ability.
Originally posted by moribundman: Funky additives? Uh, well, I'm using LC in the Red Line 5W-30 and FP in the gas.
quote:Yes I did. I have a low resting heart beat, a steady hand and a smoothly operating trigger finger.
Did you hold the plug in the lower pict with your hand? Steady!
quote:The camera I used has the macro setting at the lens's wide end (28 mm equivalent). That's not what most people would want in a lens, and it's not ideal for what I used it here, but it's exactly what I usually need.
Some lower cost cameras have quantum differences in macro ability - but this is rarely mentioned in reviews, etc. Some of the digi's we have at work - are crap for macro. (One Sony and Canon) While another Sony is great, and my home Olympus is pretty great with a macro and 2X macro mode.
quote:I believe the sparking issue damaged two of the six spark plugs, and that's why two of them look so much worse than the other four. I suspect melted metal under the crusties. Because of the oil consumption issue, maybe I should use a low SAPS oil until I get around to replacing the valve stem seals?
I was gonna suggest a mechanical problem and not sparking consistently.
quote:Terry, you interpreted my last UOA. You did confirm shot valve stem seals. I replaced the ignition coils immediately after they failed. That failure did affect some data, which you pointed out. After replacing the valve stem seals, I will again make use of your services. It might take a while. I plan on replacing the head gaskets, too, so I'll have to take off the heads, and I'm not sure when I can get around to it.
Mori, did oil analysis help you with ID'ing the valve guide seal issue and or the coils issue ?