Engine 05 Mustang Gt Knocking At Idle

0

0fivemustang

New Member

Nov 7, 2015

1

0

1

Columbus, Ohio

Nov 7, 2015

#1

• Nov 7, 2015

• #1

My GT runs strong like nothing is wrong with it, but when the car gets to operating temperature and only at idle it has a very noticeable knock. When the RPMs increase it goes away, goes back down to idle the knocking returns. I'm stumped and so is everybody that I talked to. Anybody have any of these issues with their GT?

 

Dino Dino Bambino

15 Year Member

Jun 13, 2007

1,672

89

79

Cyprus

Nov 8, 2015

#2

• Nov 8, 2015

• #2

Sounds like it's oil pressure related and is happening when the engine's at hot idle and the oil pressure is at its lowest.
Possible causes are a worn cam phaser, worn timing chain tensioner, and worn con rod bearings.
Use a mechanic's stethoscope to try to localize the knock, and use a mechanical pressure gauge to check the oil pressure at hot idle.

 

C

cmann

Member

Nov 26, 2014

38

6

18

Nov 10, 2015

#3

• Nov 10, 2015

• #3

YouTube "Cam Phaser Knock" and see if it the same sound that you are experiencing. If it goes away when increasing the engine speed above 1500 rpm or so, it is more than likely a bad cam phaser.

 

SpartaPerformance

10 Year Member

Nov 5, 2006

2,517

61

89

Long Island NY

Nov 12, 2015

#4

• Nov 12, 2015

• #4

I too believe its a Cam phaser knock.