L92 / 6.2 Engine Noise HELP!
11-24-2012, 11:44 AM
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L92 / 6.2 Engine Noise HELP! Hey Guys,
I have a 6.2L L92 in an Escalade that is making a noise that I need help diagnosing.
It only does it after 2nd gear (part throttle) and gets louder as you climb through the gears (loudest 1200-2000rpms). Its most noticeable in 4th, 5th & 6th when cruising around and slowly accelerating/maintaining speed.
No sounds at start up, idle, free rev, or throughout first gear 900-6000RPM that i can hear. If I do a manaul gear select and keep it in first and mash the gas/brake to load the engine/let the RPMS climb I dont hear anything.
I dont think its anything internal like a bearing, wrist pin, lifter, etc as it would scream out at me in 1st under load.
Here is a video of it. This is from a stop up to 4th at about 40. You can really hear it around the 49-55 second mark.
Could it be detonating/pre-ignition from bad knock sensors? I was going to burn up the rest of this 87 and run some 92 and see if it helped.
Transmission/converter?
I have a 6.2L L92 in an Escalade that is making a noise that I need help diagnosing.
It only does it after 2nd gear (part throttle) and gets louder as you climb through the gears (loudest 1200-2000rpms). Its most noticeable in 4th, 5th & 6th when cruising around and slowly accelerating/maintaining speed.
No sounds at start up, idle, free rev, or throughout first gear 900-6000RPM that i can hear. If I do a manaul gear select and keep it in first and mash the gas/brake to load the engine/let the RPMS climb I dont hear anything.
I dont think its anything internal like a bearing, wrist pin, lifter, etc as it would scream out at me in 1st under load.
Here is a video of it. This is from a stop up to 4th at about 40. You can really hear it around the 49-55 second mark.
Could it be detonating/pre-ignition from bad knock sensors? I was going to burn up the rest of this 87 and run some 92 and see if it helped.
Transmission/converter?
Last edited by Z06KILLR; 11-24-2012 at 10:46 PM.
11-24-2012, 12:10 PM
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Makes incredible power. Havent checked MPG but I can have her watch it.
My old 5.4 (ford mod motor) had a bad rod bearing and would knock under any load/rpm climb which makes me think this isnt too serious (i hope).
These have piston slap when cold ( any RPM/gear, unlike this) but that goes away after warm up.
Ive heard of a catalytic converters rattling around but seems too weird/one off....
My old 5.4 (ford mod motor) had a bad rod bearing and would knock under any load/rpm climb which makes me think this isnt too serious (i hope).
These have piston slap when cold ( any RPM/gear, unlike this) but that goes away after warm up.
Ive heard of a catalytic converters rattling around but seems too weird/one off....
Last edited by Z06KILLR; 11-24-2012 at 12:16 PM.
