My spark plugs part 2!!!

Rennat

Rennat

5psi...? haha
Dec 6, 2005
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Tracy, CA
www.myspace.com
So i've been fixing other things and putting off fixing what i THINK is the cause of this...

compression good
leak down - less than 8% on all
all OEM pcv, and vacuum lines and routing
rebuilt engine... less than 2k
these spark plugs were cleaned less than 700miles ago and looks brand new... now they look like this.

1 - some what bad...
2- has stuff over most of it
3 - looks like a decorated x-mas tree.... wtf?
4 - worse than #1, but less than #3
5 - same as #4
6 - looks just like a regular ol spark plug thats running good...

p1167740_1.jpg



my guess issss.... valve stem seals. because its inconsistent across the cylinders. and i just had my turbo rebuilt... and NO OIL in my 3000pipe, or in my intake. and i replaced them with new plugs today, because i couldnt believe how bad these were...
 
Rennat

Rennat

5psi...? haha
Dec 6, 2005
2,844
0
0
Tracy, CA
www.myspace.com
those are the OEM heat range, 6 is what was on the plug.

no smoke on decel that anybody sees, only under boost.
sometimes i get smoke on start up, but i've noticed that since its gotten colder, i get it a lot less.


and this is what they all looked like on september 6... just last month!
p1167879_1.jpg
 
Last edited:
Nomad707

Nomad707

Im From The Bay
Mar 14, 2007
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Santa Rosa, California
Rennat;1167879 said:
those are the OEM heat range, 6 is what was on the plug.

no smoke on decel that anybody sees, only under boost.
sometimes i get smoke on start up, but i've noticed that since its gotten colder, i get it a lot less.
Click to expand...

well then we can apply the simple theory of expand and contract. when its cold the seals might shrink up an insanely small amount. when it warms up the expand a tiny fraction which lets by a miniscule amount of oil which doesn't cause to smoke, but causes fouling.

other then that, i'd go with what IJ said, he knows alot more then i do.
 
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