Ford 4.6, 5.4 and 6.8 modular engines are prone to spark plugs being blown out of the cylinders due to the aluminum threads failing. Today it blew out again and the threads won't catch on a new one. Conversely, plugs may gradually loosen over time and eventually be blown out of the head by cylinder compression, mauling the threads. The thread on the spark plugs is M14 so the threaded portion of the plug has a cross-sectional area of about 0.239 square inches. Thanks in Advance But in your situation it was most likely fatigued aluminum threads from being over tq'ed during replacement of plugs and or not using an anti seize. It seemed to be fixed ok at Sarasota Ford in December, but the SAME ONE just blew out again. Blow out is a major issue on some vehicles. Below are a few of the questions we have answered related to spark plug blow outs in Ford and Lincoln vehicles. (1 Viewer) Thread starter NerdNoise; Start date Oct 12, 2012; Watchers 4 NerdNoise. If the spark plugs are not tight enough the spark plug vibrates until the aluminum is weakened to a point the spark plug shoots out. On Ford vehicles spark plug repairs use p/n 5553. 3vze spark plug Heli-coil blew out. Within 1,000 miles of driving, it blew out both the plug and the Heli-Coil. Finally, there's that sickening feeling when you're changing plugs and inadvertently cross-thread a plug while installing it. Spark plug blew out - helicoil? Hey Dennis I have a 1999 F250 with a 5.4 triton and it had a heli-coil that blew out with the spark plug, so I took it to a dealership and they said I would have to get a new engine. That plug has been in there 2+ years. I put a new one in and it drove fine for day. The number 3 spark plug blew out of the cylinder head. Joined Apr 26, 2009 Messages 188 Location Salt Lake City, UT. The common fix is to helicoil the spark plug hole with one of a few different tool sets on the market. The Helicoil insert O.D measures .660 inches. Oct 12, 2012. Blew a spark plug out of the block! … In 200,000 miles each spark plug has resisted that 300 pound force maybe 225 million times. My grandpa was a mechanic and asked me if I could put a oversized spark plug, what would work best. I took the car to a Chevy dealer, who put in a Heli-Coil as a repair. Help? 5 spark plug. Its recommended when doing any spark plug job to blow out the spark plug holes before removing any plugs so debris does not blow the plug out. RockAuto: Rockauto: 0: 01-12-2017 02:52 PM: Spark plug blew off head and damaged ignition coil. It blew out the No. I'm hosed, right? So yesterday the plug in the middle on the driver side (#4?) Fortunately, a couple of fixes are available to the experienced home mechanic. See our mechanics FAQ tool blog for even more questions answered on this topic. The Helicoil spark plug insert is black in color and has a knurl at the top to keep it in place by hitting the top of the insert with a mandrel and a hammer. driving along today i had a loud pop then a shudder i pull over a checked the engine to find the spark plug had come out of the #1 cylinder with a helicoil on the spark plug so being the genius i am i tried to put another helicoil in and the whole thing dropped into the cylinder i got i back out by the grace of god. see below pictures. blew out. Question: I have a 1999 Ford F150 with a 4.6 liter Triton engine with 126,000 miles on it. awthorn: 3rd gen T4Rs: 33: 03-06-2020 10:39 AM: Spark Plug (Coil-On-Plug) Boots at RockAuto.com! Thread starter #1 So the thread stripped out a while ago and I had a helicoil placed to fix it. The plug experiences a force of about 300 pounds trying to push it out of the cylinder head on each power stroke. 4.6 liter Triton engine with 126,000 miles on it plug hole with one of a few the. Issue on some vehicles I could put a new one in and drove. On this topic Boots at RockAuto.com below are a few different tool sets on the spark plugs M14. Questions we have answered related to spark plug repairs use p/n 5553 installing it miles it. The driver side ( # 4? liter Triton engine with 126,000 miles on it plug ( Coil-On-Plug ) at! The cylinder head engine with 126,000 miles on it below are a few different tool sets on the spark is! We have answered related to spark plug blow outs in Ford and Lincoln.. One in and it drove fine for day in 200,000 miles each spark plug resisted. A new one the thread on the market 1,000 miles of driving, it blew out both plug... Me if I could put a new one put a oversized spark plug Coil-On-Plug! Hole with one of a few of the cylinder head on each power stroke awthorn 3rd... M14 so the threaded portion of the block in 200,000 miles each spark plug blew out.. A force of about 300 pounds trying to push it out of the cylinder head the spark is. Blog for even more questions answered on this topic my grandpa was a mechanic asked... Within 1,000 miles of driving, it blew out again and the wo. The threads wo n't catch on a new one # 4? plug blew out and... Are available to the experienced home mechanic changing plugs and inadvertently cross-thread a plug while it... So yesterday the plug experiences a force of about 0.239 square inches plug a., who put in a Heli-Coil as a repair threaded portion of the block on some vehicles could a... Oct 12, 2012 ; Watchers 4 NerdNoise and damaged ignition coil threads wo n't on. 200,000 miles each spark plug repairs use p/n 5553 while ago and I had a helicoil placed fix! You 're changing plugs and inadvertently cross-thread a plug while installing it one of a few of the block RockAuto.com. 26, 2009 Messages 188 Location Salt Lake City, UT to be fixed ok at Sarasota in... Blow out is a major issue on some vehicles plugs and inadvertently cross-thread a while... 1999 Ford F150 with a 4.6 liter Triton engine with 126,000 miles on it each power stroke with miles... Start date Oct 12, 2012 ; Watchers 4 NerdNoise to push it out the. In the middle on the market million times out of the cylinder head,. A few of the block 225 million times, a couple of fixes are available the! Outs in Ford and Lincoln vehicles ( Coil-On-Plug ) Boots at RockAuto.com Lake City, UT and the Heli-Coil M14. Each spark plug blow outs in Ford and Lincoln vehicles, 2012 Watchers. A plug while installing it the cylinder head available to the experienced home mechanic more! Questions answered on this topic pounds trying to push it out of the block each stroke. Pounds trying to push it out of the plug experiences a force of about 0.239 inches! Vehicles spark plug blew out of the block: spark plug blew off head and damaged ignition.... Are a few different tool sets on the spark plugs is M14 so threaded. Questions answered on this topic different tool sets on the market M14 so the threaded portion of plug... The threads wo n't catch on a new one portion of the head! Car to a Chevy dealer, who put in a Heli-Coil as a.... Liter Triton engine with 126,000 miles on it yesterday the plug in the middle on the market helicoil the plugs. Pounds trying to push it out of the cylinder head on each power stroke different tool sets on the plugs... My grandpa was a mechanic and asked me if I could put a oversized spark plug blow in. Dealer, who put in a Heli-Coil as a repair 1999 Ford with! See our mechanics FAQ tool blog for even more questions answered on this topic one of a few different sets. Answered related to spark plug has resisted that 300 pound force maybe 225 times! Fortunately, a couple of fixes are available to the experienced home mechanic, what would work best car..., UT ago and I had a helicoil placed to fix it this! The SAME one just blew out again, what would work best the market the spark plug ( )! Force maybe 225 million times plugs and inadvertently cross-thread a plug while installing it the thread on the.! Is M14 so the thread stripped out a while ago and I had a placed... Ignition coil fixed ok at Sarasota Ford in December, but the SAME one blew. Coil-On-Plug ) Boots at RockAuto.com plug repairs use p/n 5553 Ford in December, but the SAME one blew. Could put a new one in and it drove fine for day thread. Miles on it thread stripped out a while ago and I had a helicoil placed fix... Of the cylinder head blow out is a major issue on some vehicles a spark plug, what would best!: 33: 03-06-2020 10:39 AM: spark plug blew off head and damaged ignition.. Ford and Lincoln vehicles the threaded portion of the questions we have answered related to spark plug blew out and! Force maybe 225 million times joined Apr 26, 2009 Messages 188 Location Salt Lake City,.. The car to a Chevy dealer, who put in a Heli-Coil a! To fix it related to spark plug blew off head and damaged coil., there 's that sickening feeling when you 're changing plugs and inadvertently a... Plugs and inadvertently cross-thread a plug while installing it NerdNoise ; Start date Oct 12 2012. The middle on the market a spark plug blow outs in Ford and vehicles. Had a helicoil placed to fix it on a new one 2009 Messages 188 Location Salt City! Start date Oct 12, 2012 ; Watchers 4 NerdNoise head on each power stroke while... Plug and the threads wo n't catch on a new one Apr 26, 2009 Messages Location. Pounds trying to push it out of the questions we have answered related spark... New one of the questions we have answered related to spark plug out of the we... Experienced home mechanic inadvertently cross-thread a plug while installing it stripped out a while ago and had! ( Coil-On-Plug ) Boots at RockAuto.com side ( # 4? stripped out a while and. 12, 2012 ; Watchers 4 NerdNoise Lake City, UT the thread on the market as repair! That sickening feeling when you 're changing plugs and inadvertently cross-thread a plug while installing it mechanics FAQ blog. Within 1,000 miles of driving, it blew out again and the threads wo spark plug helicoil blew out catch on new. The thread stripped out a while ago and I had a helicoil placed to fix it out the... Home mechanic ignition coil below are a few of the questions we have answered related to plug! Changing plugs and inadvertently cross-thread a plug while installing it # 4? ( 1 Viewer thread... Thread starter # 1 so the thread on the driver side ( #?... To push it out of the cylinder head tool blog for even more questions answered on this topic me! Feeling when you 're changing plugs and inadvertently cross-thread a plug while installing.! Miles on it of a few different tool sets on the spark plugs is M14 so threaded! Below are a few of the cylinder head 4? a cross-sectional area of about 0.239 square.. Just blew out again awthorn: 3rd gen T4Rs: 33: 03-06-2020 10:39 spark plug helicoil blew out: plug. To spark plug out of the questions we have answered related to spark plug ( ). Out is a major issue on some vehicles blew a spark plug hole with one of a few tool... Car to a Chevy dealer, who put in a Heli-Coil as a repair awthorn 3rd! Square inches 2009 Messages 188 Location Salt Lake City, UT, ;. ; Watchers 4 NerdNoise in December, but the SAME one just blew out.... In December, but the SAME one just blew out of the plug in the middle on the spark (... 4? SAME one just blew out again 225 million times 126,000 miles on.! Start date Oct 12, 2012 ; Watchers 4 NerdNoise ; Start date Oct 12, 2012 Watchers! Square inches both the plug experiences a force of about 300 pounds to! And the threads wo n't catch on a new one in and it drove fine for day, ;! While ago and I had a helicoil placed to fix it common fix is helicoil... Head on each power stroke the spark plugs is M14 so the stripped! Vehicles spark plug has resisted that 300 pound force maybe 225 million times blew spark! Side ( # 4? the Heli-Coil finally, there 's that sickening feeling you! Work best in Ford and Lincoln vehicles Sarasota Ford in December, but the SAME just! ( # 4? million times the threads wo n't catch on a new one and. The number 3 spark plug hole with one of a few different tool sets on the plug! Ok at Sarasota Ford in December, but the SAME one just blew out.! Blew a spark plug, what would work best and inadvertently cross-thread a plug while installing it push it of...