Has anyone heard of someone experiencing multiple spark plug blow outs on their power plant? I was de-flowered this past Wednesday night with my first, and was wondering if I should expect it again anytime soon. Mine was the passenger side three back from the front.
I love this bar, I mean forum.

 

Number two this past weekend. Still wouldn't consider another truck...

 

I've been in the blown spark plug business for quite some time now and I personally have never heard of someone blowing more than one per motor. Don't know why, seems logical it could happen again since the condition that causes it is the same on all holes. Most likely dumb luck if a given motor never blows more than one.

 

i blew one about a year and a half ago, a couple of weeks after i changed my plugs, because i didnt TQ them down, just kinda hand tightened them, well after i made it back to the house with my new parts i TQ'd them all down and nothing since

 

Clean the threads and seats, install Motorcraft plugs with NO antiseize, and torque them to 28 ft/lb.

 

my 01 service manual says 78-176in.lbs. (6.5-15ft.lbs)

 

I know what the service manual says and that's a BIG reason for them launching.

www.blownoutsparkplug.com - FAQ #49.

Those guys are certified Ford master techs.

 

So blown spark plug.com says to air blast before and after plug removal for proper seating of new plugs. What do you plug the hole with when air blasting when the plug's been removed?

 

gottcha!


Q: Why do you prefer 28-32 foot lbs torque instead of the factory specification?
A: Over the past few years we have heard from many of our customers that they tightened their plugs to the correct torque but they still came loose. We worked with over 10 Ford Certified Master Mechanics and concluded that 30 foot lbs of torque would be satisfactory. We have been using 28-32 foot lbs of torque for many years and have never had one come loose or strip out. To verify that we would not damage the original threads we used a test cylinder head with good factory threads we applied over 100 foot lbs of torque to the spark plug without any failure.

 

I remember when you blew one or talked about it before you went into the biz. That loner program was pretty cool

I got a call from a gas station,- a guy that owned an Expy had his second go.

I've read about one other , here, - User name = twinntips and it was his dad that posted, I can't recall his user name darnet. Anyway, plugs were NGK,the blown NGK was replaced with a Motorcraft. That didn't make much difference, another NGK blew and the Motorcraft loosened up.

Not sure what happened after that, - the post ended. In this case the user overtightened the NGK's and used anti-seize to boot. When anti seize is used, you must reduce torque values by 30-40%. That wasn't followed I'm sure. Anti-seize, isn't needed.

I bet Ford's #'s include anti-seize, I'll find out here in a minute, there's LOTS of spec sheets floating around on the Internet lol.. That's the only reason I could guess the manufacturers #'s are so low.

On the other hand, - Fords #'s vary per manual lol. -

Here's one, - Nope!, doesn't call for anti-seize on the install -



Here's another -



I found one more on a service DVD, but it says the same thing as #1 diagram and NO anti seize, so yea, that's screwed up. Although it does spec @ 20' lbs on the high side, -that is what I use dry. I do trust blownsparkplug.com's numbers, - they have done their homework, I just haven't had a problem yet.