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Check out this spark plug
Posted: Wed Feb 25, 2004 2:08 am
by eastcoastbumps
This plug is out of my newly aquired Legacy. It looks like its in very rough shape. Where is all that oil from? I pulled it from the number 1 cylinder so its not oil that dripped down the filler tube. Could it be from a bad valve cover gasket? Or something more serious? What would cause scorching on the porcelin like that?
I've got a new set of iridiums that were in my WRX for 200 miles. Is it ok to replace it with these? I looked up how to decode a plug but there wasn't any info on the one I pulled out (BKR6E) All I know is that it physicly fits and its the right heat range.
Pete
Posted: Wed Feb 25, 2004 2:18 am
by ciper
Its leaking exhaust out of the cylinder THROUGH the spark plug!
Posted: Wed Feb 25, 2004 2:25 am
by eastcoastbumps
How the hell does it go through the spark plug? Defective plugs? Under torqued?
Pete
Posted: Wed Feb 25, 2004 2:48 am
by ciper
Either because the crush washer is bad (too tight, removed and reinserted) or there is a crack inside.
Anyways, get some NGK V-Powers for 5-10$ and move on! Dont use any fancy plugs.
Posted: Wed Feb 25, 2004 3:03 am
by eastcoastbumps
It will be 30K miles before I have to replace the WRX plugs again. And thats another $5-10 that I would have to spend. I'm just going to throw these in.
I'm curious about how the other plugs look. Its too cold and dark to try and pull out the other three now.
Pete
Posted: Wed Feb 25, 2004 3:41 am
by vrg3
You should realize that after they've been installed once, crush washers exhibit a greatly reduced ability to seal. Every time you reuse a spark plug after removing it from an engine you increase the chance that it will leak.
Posted: Wed Feb 25, 2004 7:40 am
by THAWA
Birdwalk: What year is your scirocco? 8v or 16v? got any pics
Posted: Fri Feb 27, 2004 5:38 am
by eastcoastbumps
THAWA wrote:Birdwalk: What year is your scirocco? 8v or 16v? got any pics
Birdwalk? Do you mean me? I've got a Scirocco. Its an 8V. Its painted Audi S4 Nogaro Blue, has Sparco Evo seats and other complementing Sparco items, a rebuilt head (3 angle valves, port & polish, big cams, TT adjustable cam gear), 4-2-1 header and TT exhuast, and an O2A transmission.
Its an autocross car. I share it with my brother and we run in Street Mod. We'll be running Kumhos and 13x9 Diamond Racing wheels this season. We've got a cage going in and we're still undecided on suspension. Any suggestions?
Pete
Posted: Fri Feb 27, 2004 5:42 am
by THAWA
sorry I meant I was going on a bird walk. Very cool mods so far. I can't suggest anything caus I don't relaly know, I just like scirocco's
Posted: Fri Feb 27, 2004 8:20 pm
by NuwanD
are you sure about the exhaust leaking through the plug? I'd assume that was burnt oil which is making that scorching mark, and the oil got in through those usual valve cover leaks
just an idea
Posted: Fri Feb 27, 2004 9:12 pm
by ciper
Oil doesnt travel upwards. How would it leak into the spark plug holes? Also if it was oil the boots would be damaged.
Posted: Sat Feb 28, 2004 12:46 am
by evolutionmovement
There shouldn't be any oil in there unless its spilled - the valve covers are below the plug holes and I can't see a HG causing that either. Possibly a cracked head could, but it seems an umlikely place to crack and an unlikely way for oil to get in anyway unless it was slipping past the valve seals and the crack was between the intake and plug hole...But then it still shouldn't get past the washer and that would be a lot of oil. It must have been spilled in there somehow or near it and the spill travelled.
Steve