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I found oil in my spark plug hole per picture. I’m attempting a spark plug change. I still researching where to even get the plugs but found this when I pulled one of the coils off (see picture) please advise part number for plugs and coils or where to get them for a 2012 GT. The plug in it are original to the car. Somebody anybody!
Cant see the oil from the pic ....if it’s minor just in one leave alone .
The alternative ( if they all are full of oil ? ) is to order a rocker cover gasket .Also separate plug seals ( 6 each side ) .Theses are tricky to replace and ensure a better seal . You could even be in a worse position from leaks after if you don’t know what you are doing .Its your call . https://www.flyingspares.com/shop/be...7c103484c.html
You may disturb the VVC seal and you don’t want to be changing that.
Mixed views and using proprietary gasket seal paste as well .....a lot of cleaning up removing / prepping the old surfaces to get a 100 % seal .
Last edited by John Fiammetta; 01-21-2020 at 07:16 AM.
Here are some pictures to help you understand the sealing of the oil from the sparkplug tubes.
I have all of the items available used very low mileage.
Johnny
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Last edited by Johnny Hotspur GT; 01-21-2020 at 02:56 PM.
Reason: Add pictures
Not yet I stopped working on it until I get the spark plugs in. It has a slight misfire without a engine light, which is why I went to do the plugs. But after seeing all that oil (about two inches) in the spark plug canal I panicked. I really don’t want to pull the valve cover as I don’t wanna make a bigger issue for myself as mentioned before
Judging by the build up of crud on the electrode, the leaking spark plug tubes is not your misfire problem. It could be if the oil was enough to ground the coil, but if that was it, I’d expect the electrode to be wet/black. I’d change the plugs and possibly the coil on that cylinder. Run it for awhile and see if the miss returns...
Judging by the build up of crud on the electrode, the leaking spark plug tubes is not your misfire problem. It could be if the oil was enough to ground the coil, but if that was it, I’d expect the electrode to be wet/black. I’d change the plugs and possibly the coil on that cylinder. Run it for awhile and see if the miss returns...
Thanks I’ll do just that. The chrome part of the coil was dripping with oil so yea maybe it did ground off somehow. I’ll keep you updated I hope to get the plugs in this week
Judging by the build up of crud on the electrode, the leaking spark plug tubes is not your misfire problem. It could be if the oil was enough to ground the coil, but if that was it, I’d expect the electrode to be wet/black. I’d change the plugs and possibly the coil on that cylinder. Run it for awhile and see if the miss returns...
Also what would you recommended about the oil issue or should I just clean it all up and leave it as it be or ever try a (gasket maker) tubbed solution around the inside of the canal where the gasket is
It would be interesting to know what the other spark plugs look like. You say they are original plugs, which I would guess looking at the condition of that one. How many miles on the car? Does it have an oil consumption problem? What does the inside do the coil wire connection where it snaps over the spark plug look like? Is it full of oil? The porcelain on the plug doesn’t look oil covered... unless you wiped it off for the picture.
It would be interesting to know what the other spark plugs look like. You say they are original plugs, which I would guess looking at the condition of that one. How many miles on the car? Does it have an oil consumption problem? What does the inside do the coil wire connection where it snaps over the spark plug look like? Is it full of oil? The porcelain on the plug doesn’t look oil covered... unless you wiped it off for the picture.
No oil consumption it’s full of oil. It’s a 2012 with 70 thousand miles...I’m on the way home I’m going to clean the oil out and pull that spark plug out I’ll take pictures and post them
It would be interesting to know what the other spark plugs look like. You say they are original plugs, which I would guess looking at the condition of that one. How many miles on the car? Does it have an oil consumption problem? What does the inside do the coil wire connection where it snaps over the spark plug look like? Is it full of oil? The porcelain on the plug doesn’t look oil covered... unless you wiped it off for the picture.
And also the wire where the coil attaches on top is dry and has no oil here are some pictures of the plug and coil that had the oil in the canal
Those plugs look fine. I’d change them out for new ones. I’d consider changing the coil at least on the one plug that was bad. Alternatively you might swap the coil pack wit another cylinder and see if the problem moves to that one. It really isn’t uncommon to get a spark plug that goes bad. Don’t over analyze and assume the worst. I think the plug change and swapping the coil pack will solve your issue. Keep us posted. If that same cylinder fouls up the plug we need to look deeper.
@Douglas 35 , just out of interest did you notice any running problems like uneven running or unsteady tick over ?
Also did it throw a dash light , the CEL “check engine light “ ?
Just trying to get a handle on the alleged shorting of the coil pack from the oil level in the plug hole .
To add balance I had a Testarossa for a while and if you pulled a plug lead off one bank ......nothing really happened, you couldn’t tell it had dropped a cylinder either revving up at tick over .
By the time you pulled 3 off , one on one side and two on the other then it ran lumpy and was obvious it was misfiring , hesitated revving up etc .
But one “bad “ out of 12 very difficult to detect any difference with a 5.0 L 12 cylinder.
No engine management or check engine lights back in 86 , and being a flat 12 configuration any rocker lid leaks just ( which there here many ) just ran out of the plug holes .
Coming back to the W12 and Bentley is the 60,000 miler a biggie service with a recommended complete change of plugs + coil packs anyhow ?
In a prophylactic way so it’s good for another 60K ?
Those plugs look fine. I’d change them out for new ones. I’d consider changing the coil at least on the one plug that was bad. Alternatively you might swap the coil pack wit another cylinder and see if the problem moves to that one. It really isn’t uncommon to get a spark plug that goes bad. Don’t over analyze and assume the worst. I think the plug change and swapping the coil pack will solve your issue. Keep us posted. If that same cylinder fouls up the plug we need to look deeper.
The coil that was on the Bad plug seem fine the coil that was on the good plug which had oil in the canal seem bad but it had a good plug which is weird to me
@Douglas 35 , just out of interest did you notice any running problems like uneven running or unsteady tick over ?
Also did it throw a dash light , the CEL “check engine light “ ?
Just trying to get a handle on the alleged shorting of the coil pack from the oil level in the plug hole .
To add balance I had a Testarossa for a while and if you pulled a plug lead off one bank ......nothing really happened, you couldn’t tell it had dropped a cylinder either revving up at tick over .
By the time you pulled 3 off , one on one side and two on the other then it ran lumpy and was obvious it was misfiring , hesitated revving up etc .
But one “bad “ out of 12 very difficult to detect any difference with a 5.0 L 12 cylinder.
No engine management or check engine lights back in 86 , and being a flat 12 configuration any rocker lid leaks just ( which there here many ) just ran out of the plug holes .
Coming back to the W12 and Bentley is the 60,000 miler a biggie service with a recommended complete change of plugs + coil packs anyhow ?
In a prophylactic way so it’s good for another 60K ?
Yes I noticed a stutter/miss coming out of the passenger Tailpipe it was very slight but noticeable the stutter come out of the same side as the oil filled spark plug canal, Which also intern had These plugs on the same side I haven’t took out the rest yet
This one actual spark plug come out of the canal that had oil in, it seems good. The one without any oil in the canal are the first three pictures which seem bad
01-21-2020 | 03:43 AM
