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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
need help finding false knock?
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<blockquote data-quote="Shaun@AED" data-source="post: 14320981" data-attributes="member: 32381"><p>It may be a good idea to do a sticky on where people have found their *false* knock to be coming from.</p><p>The most common places from my experience are in the pic below, circled in Red:</p><p>1. Cat to H-pipe clamp installed upside down so bolt head is down and threads re UP hitting the under carriage.</p><p>2. X/H pipe cross over too close to the trans cross member.</p><p>3. Over the axle pipes hitting suspension components or Rear end (common on lowered vehicles)</p><p>4. Loose axle back clamps</p><p></p><p>[ATTACH=full]592434[/ATTACH]</p><p></p><p>Keep in mind, the engine will torque over to the passenger side during heavy Acceleration, which means when on jack stands everything may clear just fine, but under WOT / heavy acceleration the exhaust may hit something. The same goes for the suspension. On heavy launches the car may squat and the exhaust may hit suspension components or the rear end.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 14320981, member: 32381"] It may be a good idea to do a sticky on where people have found their *false* knock to be coming from. The most common places from my experience are in the pic below, circled in Red: 1. Cat to H-pipe clamp installed upside down so bolt head is down and threads re UP hitting the under carriage. 2. X/H pipe cross over too close to the trans cross member. 3. Over the axle pipes hitting suspension components or Rear end (common on lowered vehicles) 4. Loose axle back clamps [ATTACH=full]592434[/ATTACH] Keep in mind, the engine will torque over to the passenger side during heavy Acceleration, which means when on jack stands everything may clear just fine, but under WOT / heavy acceleration the exhaust may hit something. The same goes for the suspension. On heavy launches the car may squat and the exhaust may hit suspension components or the rear end. [/QUOTE]
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Engine/Tuning
need help finding false knock?
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