Oil on spark plug threads, what does it mean?
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Oil on spark plug threads, what does it mean?
I'm at 105,000 miles on my Ranger, it's a 2004 4.0L V6. Today I ran Seafoam through the brake booster and changed out the plugs and wires, they've probably been on the truck now for about 40,000 miles. All of the plugs looked fine, there was no fouling to them, they were still at the gap I originally set them at, just a little bit rounded at the electrode. What caught my interest was a wet looking thread on my 2, 3, 5 and 6 cylinder plugs. It's not really bad, just slightly wet and smelling of oil. Does anybody know what this might mean? I am not hearing any engine knock or valve tapping, if that helps.
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Is there a tool that I could possibly rent to do the compression check myself, and how difficult is it to do?
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If the plugs were not tight enough or the gasket did not seal the oil will be pushed out.
There is oil in every cylinder and its supposed to be there. Every engine burns oil. The amount it burns is the key.
If your covers are clean it had to come around the threads. Or a spill from a long time ago.
If the electrodes looked good on the old plugs you should be fine. If your **** compression and leak down tests are in order.
There is oil in every cylinder and its supposed to be there. Every engine burns oil. The amount it burns is the key.
If your covers are clean it had to come around the threads. Or a spill from a long time ago.
If the electrodes looked good on the old plugs you should be fine. If your **** compression and leak down tests are in order.
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I had oil on 2 of my 6 spark plugs.. There was stuff inside the spark plug hole as well if you stikc your finger in there and pull it out, you whould be able to get something out of the threads..
You probably dont have a cracked head.. But i would still get a compression test done.. any ford dealership can do it shouldnt cost more than 30 bucks.
You probably dont have a cracked head.. But i would still get a compression test done.. any ford dealership can do it shouldnt cost more than 30 bucks.
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06-23-2008 06:58 PM