Here is A video that explains the misconception about pistons slapping spark plugs out the cylinder heads
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Sent from my iPhone using the svtperformance.com mobile app
Why are you rebuilding an 03 SVT Cobra? They last forever even when making 5000 horsepower
I happen to like his videos. It will be a shame if the same few people who trashed the other thread continue to do so in the future. Just look at the first response.
Jimmy, while most of know this I have seen/heard more than a few people say the piston hit the plug/could have hit the plug
Good video, don't get discouraged....... but...
On the 03s and early 04s with only 4 spark plug threads in the heads, that have blown plugs out of the head, who in the world actually thinks that is was caused by the piston coming up and hitting the plug? That would have to be a very non-gear head, non-car guy type of person. Naive comes to mind.
When those few threads fail, it is simply the pressure in the cylinder that blows the plug out. It does not have to be the greater pressure caused by detonation. Additionally the ground strap is typically not hammered closed by the detonation event, it is hammered closed by the on going up and down slamming the plug is subjected to in the plug well of the head as the cylinder alternates between vacuum and compression. The plug is held captive by the coil boot and the coil covers, so it just keeps slamming up and down till the engine is shut off.
Good point.
Yeah I guess I should not assume that most people understand compression height, deck height or piston dish depth. These days there truly are way less people who are even interested in internal combustion engines any more.