Oil and goo and spark plugs
Thread Starter
Luckily no broken cambelt
Joined: Nov 2009
Posts: 97
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From: Sweden
Oil and goo and spark plugs
Hi everyone!
I've just pulled my plugs and that raised some questions.
1. My trailing plugs looks fine but not my leading, right? (This question is not so important as I'm replacing them all anyway.)
2. My rear trailing plug had some oil on it. Why? Is it bad? I have found this question unanswered in other threads on this forum.
3. The brown goo, mainly on my front trailing but also my front leading. Is it the kind that comes from the knock sensor?
/Thanks
I've just pulled my plugs and that raised some questions.
1. My trailing plugs looks fine but not my leading, right? (This question is not so important as I'm replacing them all anyway.)
2. My rear trailing plug had some oil on it. Why? Is it bad? I have found this question unanswered in other threads on this forum.
3. The brown goo, mainly on my front trailing but also my front leading. Is it the kind that comes from the knock sensor?
/Thanks
they all look fine to me, and that brown goo is probably just congealed oil. it heats up and cools off and decomposes to the crap you see on your plugs. I wouldn't sweat it too much, just make sure none of it got into the spark plug boot and you should be fine.
Directly above your front rotor plugs is the knock sensor and oil filler neck.
1. Inspect the sensor to see if the epoxy encapsulation has melted out. This can dribble down onto the plugs/wires.
2. Check the two vent lines from the filler neck. Make sure they are not loose and oily. Most importantly be careful when pouring oil into the neck. All it takes is a couple of drips from each quart to make a mess over time.
It is possible that the rear trailing was not torqued properly resulting in a small amount of blow by.
Leading plugs always see more wear.
1. Inspect the sensor to see if the epoxy encapsulation has melted out. This can dribble down onto the plugs/wires.
2. Check the two vent lines from the filler neck. Make sure they are not loose and oily. Most importantly be careful when pouring oil into the neck. All it takes is a couple of drips from each quart to make a mess over time.
It is possible that the rear trailing was not torqued properly resulting in a small amount of blow by.
Leading plugs always see more wear.
Directly above your front rotor plugs is the knock sensor and oil filler neck.
1. Inspect the sensor to see if the epoxy encapsulation has melted out. This can dribble down onto the plugs/wires.
2. Check the two vent lines from the filler neck. Make sure they are not loose and oily. Most importantly be careful when pouring oil into the neck. All it takes is a couple of drips from each quart to make a mess over time.
It is possible that the rear trailing was not torqued properly resulting in a small amount of blow by.
Leading plugs always see more wear.
1. Inspect the sensor to see if the epoxy encapsulation has melted out. This can dribble down onto the plugs/wires.
2. Check the two vent lines from the filler neck. Make sure they are not loose and oily. Most importantly be careful when pouring oil into the neck. All it takes is a couple of drips from each quart to make a mess over time.
It is possible that the rear trailing was not torqued properly resulting in a small amount of blow by.
Leading plugs always see more wear.
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