Sparkplug nightmare!!!!!! (with pics)
Thread Starter
Racer
Joined: Jun 2007
Posts: 459
Likes: 2
From: Hawaii
Sparkplug nightmare!!!!!! (with pics)
I just purchased this 96 LT1 in June 07, I changed the sparkplugs a week ago, I know i should have changed them earlier..... Within the first month of owning the car, I had already replaced all of the fluids and all of the filters in the car, along with the brake pads. But forgot to replace the sparkplugs. After a increase in rough idle, I changed the plugs... They were AC 41-943. I dont know when these plugs were last replaced. These plugs were almost completly fouled from the electrode to threads. Luckly the anit-seize held up!! I replaced them with some NGK V-Power TR55's. No worries now, smooth idle and runs great!!! Might wanna checkout yours!!!!!!
Drifting
Joined: Aug 2006
Posts: 1,326
Likes: 18
From: Los Angeles California
Those oily deposits all throughout the threads are not normal. Either your valve covers are leaking oil down the outside of the heads and into the spark plug holes, or you've got piston ring or valve seal issues.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
they are supposed to have these little platinum pucks on the ground strap... they vanish by 40k miles. the gap then grows from .050 to .065... and the car runs like ****.
Job well done! I use nothing but NGK when available.
I would say the oil is a valve cover issue. It seems isolated to the top third of the threads.
Job well done! I use nothing but NGK when available.
I would say the oil is a valve cover issue. It seems isolated to the top third of the threads.
Drifting
Joined: Dec 2002
Posts: 1,861
Likes: 4
From: Houston TX
Also note that if the oil was coming from the cylinder rather than down the outside of the head, you'd see burned oil deposits on the electrode and ground strap of the spark plug. There's nothing there but regular carbon deposits.
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
they are supposed to have these little platinum pucks on the ground strap... they vanish by 40k miles. the gap then grows from .050 to .065... and the car runs like ****.
Job well done! I use nothing but NGK when available.
I would say the oil is a valve cover issue. It seems isolated to the top third of the threads.
Job well done! I use nothing but NGK when available.
I would say the oil is a valve cover issue. It seems isolated to the top third of the threads.
I remember the last time I commented about the pucks and I got the
response........for those that posted the enjoy the photos
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