Spark Plug Deterioration
#1
Spark Plug Deterioration
This is a photo of 2 spark plugs that were pulled from my truck last week (June 2017). I bought this truck in December of 2016 and was told and shown an invoice that all 8 spark plugs were replaced.
Is anyone aware of an engine issue that could cause a spark plug to deteriorate this quickly or was I lied to by the dealership/mechanic shop?
Is anyone aware of an engine issue that could cause a spark plug to deteriorate this quickly or was I lied to by the dealership/mechanic shop?
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Griff2007FX4 (06-26-2017)
#4
Senior Member
What's the invoice date?
Those plugs could be original. That style went away a long time ago.
My experience is that many dealership employees are honest.
Those plugs could be original. That style went away a long time ago.
My experience is that many dealership employees are honest.
#5
A little more info on it all:
-Invoice date was 12/13/16
-Right after I bought the truck, it had misfire issues so the dealership (small privately owned) said they would get it fixed and based on the invoice, they did.
-Invoice says 8 x Motorcraft SP515 spark plugs were put in. Stock is SP507 so these spark plugs have definitely been replaced since the factory, just not sure when.
-2 months after the original service, I started having misfires again but assumed it was everything BUT the spark plugs since they were just replaced.
-Fast forward to now after having the entire truck serviced, all 8 ignition coils replaced and countless hours in the shop, my mechanic finally pulled all 8 spark plugs and found that they were in rough shape. He says there is no way that these spark plugs are 6 months/less than 2,000 miles old.
Wanted to confirm that with all of you.
-Invoice date was 12/13/16
-Right after I bought the truck, it had misfire issues so the dealership (small privately owned) said they would get it fixed and based on the invoice, they did.
-Invoice says 8 x Motorcraft SP515 spark plugs were put in. Stock is SP507 so these spark plugs have definitely been replaced since the factory, just not sure when.
-2 months after the original service, I started having misfires again but assumed it was everything BUT the spark plugs since they were just replaced.
-Fast forward to now after having the entire truck serviced, all 8 ignition coils replaced and countless hours in the shop, my mechanic finally pulled all 8 spark plugs and found that they were in rough shape. He says there is no way that these spark plugs are 6 months/less than 2,000 miles old.
Wanted to confirm that with all of you.
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#8
#9
Senior Member
Yes 10 years old by looking at the dirt and grease (white part of plug) on the spark plugs. I changed the sparkplugs on my 1991 a couple years ago. They were the original sparkplugs and over 20 years old. They looked a lot like yours.
#10
No longer stuck in 2003
I'd say David is probably pretty close. I wouldn't think anything less than 5 years unless the previous owner was doing something crazy with it on a regular basis. I've seen 3 year old plugs that were pretty close to that just due to hard use dirt wise.