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Old 02-17-2019, 08:32 AM   #1
tino0217
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Join Date: May 2017
Location: Seatac, wa
Posts: 172
Oil buildup on spark plug

About a year ago on my 71 C10 I know the truck was missing when I drive when I check the spark plugs on the driver side first plug towards the front there was oil deposit and build up which was making the truck miss. I had a leak in my oil pan I had somebody come out and change it and the valve covers now in the last week the truck was missing again so I checked the plugs thinking it was that same one but it wasn't I checked the passenger side plugs and it was a third one back that had oil buildup on it which is making the truck Miss anybody have any ideas why this happened
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Old 02-18-2019, 10:45 PM   #2
Sparky dave
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Join Date: Nov 2017
Location: Leeds west yorkshire
Posts: 307
Re: Oil buildup on spark plug

You already changed all the plugs you might be ready for some new ones
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Old 02-19-2019, 11:20 AM   #3
slocityk20
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Join Date: Jan 2019
Location: San Luis Obispo
Posts: 19
Re: Oil buildup on spark plug

I would say you might possibly have blow by causing oil to build up on the plug. Could be time for a hone and a set of rings. I am not an expert but that would be my guess
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