Oil in spark plug well (little bit) should I replace cam cover gasket plus sparki
#16
05-30-2016, 06:07 PM
I'm no electrician, so I'm sure someone can jump in on this..but here's my theory on "why" is causes a misfire. It's not that it's "possible", it actually does cause a misfire, that's been proven to me on more than a hand full of V12's.
The plug grounds with the cylinder head, which ground and completes the entire ignition circuit. If you fill the spark plug tube with oil/water..any liquid that is conductive, the electric charge from the windings can ark the liquid and by-pass the plug to ground. Electricity will always travel the easiest and fasted route first and drain off excess on any other circuit due to its resistance. So oil/liquid gets the majority of the coil charge and the spark plug gets enough to trigger a small spark that's useless labelling a misfire due to the slower rotation at commanded spark period.
The coil seals the top of the tube from water and any other deposits from entering, but if the cam cover seal over the spark plug tubes are faulty and leaking oil..oil will leak into the tubes. Once enough oil is in the tube, misfires are present under load.
The coil does seal over the plug, but the rubber of the C.O.P is not oil resistant, so the motor oil swells the C.O.P rubber and allows the oil to be ark'd by the coil charge
The plug grounds with the cylinder head, which ground and completes the entire ignition circuit. If you fill the spark plug tube with oil/water..any liquid that is conductive, the electric charge from the windings can ark the liquid and by-pass the plug to ground. Electricity will always travel the easiest and fasted route first and drain off excess on any other circuit due to its resistance. So oil/liquid gets the majority of the coil charge and the spark plug gets enough to trigger a small spark that's useless labelling a misfire due to the slower rotation at commanded spark period.
The coil seals the top of the tube from water and any other deposits from entering, but if the cam cover seal over the spark plug tubes are faulty and leaking oil..oil will leak into the tubes. Once enough oil is in the tube, misfires are present under load.
The coil does seal over the plug, but the rubber of the C.O.P is not oil resistant, so the motor oil swells the C.O.P rubber and allows the oil to be ark'd by the coil charge
#18
05-30-2016, 07:40 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34 
Hi did you just changed cam cover gasket or also spark well gaskets? Is there more things needed to do spark plug well gasket or they are right there once cam cover is off?
#20
06-02-2016, 08:12 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34
Are plug well gasket right there when you remove the cam cover or there are more things to re,ove?
#22
06-24-2016, 01:24 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34
Project on the way
Ok I tried cutting the rear plastic brakett and tries wiggling it persuasively
Ended up breaking it. But I don't even think that tab is absolutely necessary. The way it broke it can be glued back.
So now I have cam over off.
Does any one know if there is suppose to be any black Rtc under spark plug whole gaskets?
I don't think should be any RtV UNDER this gaskets as it may cause gasket to leak. If you put RTV IN ONE AREA say between 11 o'clock and 1 o'clock under the gasket then rest of the gasket will not seat properly and can cause it to leak.
What do you Guys think?
Ended up breaking it. But I don't even think that tab is absolutely necessary. The way it broke it can be glued back.
So now I have cam over off.
Does any one know if there is suppose to be any black Rtc under spark plug whole gaskets?
I don't think should be any RtV UNDER this gaskets as it may cause gasket to leak. If you put RTV IN ONE AREA say between 11 o'clock and 1 o'clock under the gasket then rest of the gasket will not seat properly and can cause it to leak.
What do you Guys think?
Last edited by Wildcat1212; 06-24-2016 at 02:09 PM.
#23
06-24-2016, 02:00 PM
Is it black rtv?
Many an engine service manual I have read says to put rtv in certain spots, I always use black rtv when putting an engine back together and just use a thin film. Especially when there is over 4-5" between bolts, to help prevent warpage leaks.
Many an engine service manual I have read says to put rtv in certain spots, I always use black rtv when putting an engine back together and just use a thin film. Especially when there is over 4-5" between bolts, to help prevent warpage leaks.
#24
06-24-2016, 02:08 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34
Yes it's black RTV problem is that it was only at spot say between 11:30-12:30 location under spark plug hole gasket
Which May make the gasket seat unevenly
See my post with picture it shows spark plug well hole gasket grove and gasket which is like 2 inch at most in diameter
Which May make the gasket seat unevenly
See my post with picture it shows spark plug well hole gasket grove and gasket which is like 2 inch at most in diameter
#26
06-26-2016, 09:53 PM
Like someone else posted, when doing 1 coil, Might as well do all 12. These coils are not exactly known as being reliable....expessally the 2 pin coils.
You CAN get the valve covers off without touching the rear suspension. I dont work for a dealer so I have no prob coming out and telling you that you can get the bracket off the stud. Just have to look at it and get creative, its not difficult.
You CAN get the valve covers off without touching the rear suspension. I dont work for a dealer so I have no prob coming out and telling you that you can get the bracket off the stud. Just have to look at it and get creative, its not difficult.
#27
06-26-2016, 10:11 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34 Like someone else posted, when doing 1 coil, Might as well do all 12. These coils are not exactly known as being reliable....expessally the 2 pin coils.
You CAN get the valve covers off without touching the rear suspension. I dont work for a dealer so I have no prob coming out and telling you that you can get the bracket off the stud. Just have to look at it and get creative, its not difficult.
You CAN get the valve covers off without touching the rear suspension. I dont work for a dealer so I have no prob coming out and telling you that you can get the bracket off the stud. Just have to look at it and get creative, its not difficult.
I tried to cut a slit in bracket around the stud, I tried pulling up on the plastic piece while lifting the bracket up with plasti trim tool it would not clear the stud. During this attempt I broke the bracket, I think it broke in such a manner that it can be glued back with epoxy.
If you can specify the exact trick may be I will get lucky on driver side.
I think design flow is that , the stud is too long, when reinstalling if one would just cut the extra stud off it would be easy to lift bracket off
Of the cam cover.
#29
07-03-2016, 04:03 PM
Join Date: Aug 2013
Location: Ocala, fl
Posts: 490
Rep Power: 34
I found solution to removal of rear most stud which holds plastic bracket.
See attached photo that's what you need.
Basically stud passes through a rigid plastic braket, AM should have just used little bit shorter projecting screw. I have picture of 2 stud one that original and one which I shortened with a blade covered with tape as no other tool will work.
Once you removed 8 mm nut from this stud just use the blade I pictured (don't use haror freight ones they did not cut it) I got this form lowes.
Once stud is shortened its easy s 1-2-3 just lift the plastic braket and push it back. Use 10 mm socket to remove the whole stud with washer assembly.
I am going to use new stud which I will cut off before reinstalling cam cover, as if I ver need to do same thing again it will be easy.
See attached photo that's what you need.
Basically stud passes through a rigid plastic braket, AM should have just used little bit shorter projecting screw. I have picture of 2 stud one that original and one which I shortened with a blade covered with tape as no other tool will work.
Once you removed 8 mm nut from this stud just use the blade I pictured (don't use haror freight ones they did not cut it) I got this form lowes.
Once stud is shortened its easy s 1-2-3 just lift the plastic braket and push it back. Use 10 mm socket to remove the whole stud with washer assembly.
I am going to use new stud which I will cut off before reinstalling cam cover, as if I ver need to do same thing again it will be easy.
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