1999 Ford F-150 Blow spark plug

PINHIGHER

MEMBER
1999 FORD F-150
V8
4WD
AUTOMATIC
115,000 MILES

I have a blow spark plug, #4 on the passenger side(to the rear of the motor). Need a rough estimate to properly fix, and what steps will I need to make sure are taken to prevent it from happening again?

Sunday, May 16th, 2010 AT 5:59 PM

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Can you tell me if this is on a 5.4L V8?

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Monday, May 17th, 2010 AT 6:30 AM

PINHIGHER

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3 POSTS

It is a 5.4 Ltr V8

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Monday, May 17th, 2010 AT 8:38 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

I hate to say it because I own one too, but this is a somewhat common problem. The threads for the plugs are not long enough and as a result, the plug blows out. It has happened quite often.

To properly fix it, the head will need removed, the stripped threads drilled out, retapped, and a helicoil installed. All of about 5 dollars for the helicoil that actually fixes the problem, but then gaskets need replaced. I would figure you'll have around 500.00 into parts and labor when it's all said and done. Keep in mind I don't know where you live or the average shop rates, so I could be off on price for you.

Let me know if you have other questions.

Joe
PS: There is no recall on this problem.

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Monday, May 17th, 2010 AT 10:35 AM

PINHIGHER