Oil on spark plugs [ re. Plug Wires ]

Bernie Benz b.benz at charter.net
Mon Nov 23 19:31:57 PST 2009

If the plugs were tight, had to be coming from the VC gasket. Check  
your CC breather system.


On Nov 23, 2009, at 7:21 PM, Ben Swann wrote:

> I found oil in several of the spark plug holes when I removed the  
> wires.  When I removed
> the plugs, there was a generous coating of oil on the threads and  
> plug in general.  I
> don't know if the oil was from the hole or actually from inside the  
> combustion chamber.
> From my best guess, the oil came in through the valve cover gaskets  
> round rubber rings
> that separate the cam cover from the head.  I had been running 3  
> bar since last fall and
> up to 25 PSI prior, so perhaps there is additional pressure getting  
> in the cam cover.
> The engine had developed a miss that at first was barely noticable  
> and progressed to
> generally poor driveability overall. The cleanup of oil and plug  
> swap has engine running
> great again.
> I am wondering if this is typical  - engine has about 140k miles on  
> original valve cover
> gasket.
> Ben
> -----Original Message-----
> From: Bernie Benz [mailto:b.benz at charter.net]
> Sent: Monday, November 23, 2009 10:11 PM
> To: Ben Swann
> Cc: 200q20V mailing list
> Subject: Re: Plug Wires
> Oil getting in where?
> Bernie
> On Nov 23, 2009, at 4:16 PM, Ben Swann wrote:
>> FYI - thought I had scored the "deal", but as kind of expected, the
>> wires I received were for a 10V.  Still a good buy, but I did not  
>> need
>> another new set of these. Might have one set to sell.  I'll probably
>> just return since wires do not appear to be bad.
>> The rotors also were incorrect - I think we expected that.
>> Plugs are right on - not the original Bosch, but these look every bit
>> as good and I had NKG similar ones before.  I found a lot of oil
>> around several plug wires, and electrodes coated with oil,  
>> cleaning up
>> the old plugs  did the trick to get rid of hesitation problem I had,
>> but installed the new ones.
>> Should be correct cap, but was sent in separate shipment, so don't
>> know yet.
>> Also, I failed to mention the order was from RockAuto.com
>> Now I need to figure out why so much oil is getting in there - I
>> suspect coming through the valve cover gasket.
>> Ben

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