Reason for spitting plugs found
New User
Joined: Jul 2003
Posts: 21
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From: Hermosa Beach, CA (SoCal)
Reason for spitting plugs found
Until I came here, I was unaware of the V-10's propensity for "launching" spark plugs.
When I changed the plugs on a high-mileage '99 SD-250 I bought used, I found the second plug on the passenger side already had a thread-saver type of device inserted. I discovered this when it came out with the spark plug.
I assumed this was something that a previous ham-fisted mechanic had done, so I carefully removed the insert from the spark plug and installed it, along with a new plug, into the hole, being careful not to over-tighten the thing.
Is the #4 plug the only plug affected by this phenomenon? Also, is it a reoccurring thing, something one should look out for and check occasionally?
Thanks. There seems to be some really informed enthusiasts here.
When I changed the plugs on a high-mileage '99 SD-250 I bought used, I found the second plug on the passenger side already had a thread-saver type of device inserted. I discovered this when it came out with the spark plug.
I assumed this was something that a previous ham-fisted mechanic had done, so I carefully removed the insert from the spark plug and installed it, along with a new plug, into the hole, being careful not to over-tighten the thing.
Is the #4 plug the only plug affected by this phenomenon? Also, is it a reoccurring thing, something one should look out for and check occasionally?
Thanks. There seems to be some really informed enthusiasts here.
New User
Joined: Jun 2003
Posts: 1
Likes: 0
Reason for spitting plugs found
It's not just the v-10s spitting plugs. My 2000 F250 5.4L with 106,000 miles just spit one out. It took the coil with it. Tapped the hole with a grease covered tap to keep cuttings out of the cylinder. Installed thread repair insert. Its been holding for 1,000 miles. I've got my fingers crossed.
Later,
Whistlin Dixie
Later,
Whistlin Dixie
New User
Joined: Jul 2003
Posts: 5
Likes: 0
Reason for spitting plugs found
Mechanic in my area says that spitting plugs is common in 5.4 engine. They get at least 2 a month. I have contacted the national highway safety administration. If more people complain maybe they will fix this problem.
New User
Joined: Aug 2003
Posts: 21
Likes: 0
Reason for spitting plugs found
i think the reason for spitting plugs is twofold. one the spark plug is only screwed in 4 1/2 turns and secondly corrosion. i changed my plugs at 72,000 and there was surface rust on the first four threads of all the plugs i removed.
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