502EFI Internal noise diagnosis...Listen
08-14-2012, 04:00 PM
#21
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ok i got a good night of sleep on this one,,what made the pushrod bend?? this is what i think is happening..the pushrod got bent obviously from the piston hitting the valve,,the stem on the valve could now be slightly bent and is sticking causing valve trane noise..most likely the rocker slamming into the pushrod..do a cylinder leak down test to see if you have any bent valves...i would start with the cylinder in ?
08-15-2012, 07:54 AM
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ok i got a good night of sleep on this one,,what made the pushrod bend?? this is what i think is happening..the pushrod got bent obviously from the piston hitting the valve,,the stem on the valve could now be slightly bent and is sticking causing valve trane noise..most likely the rocker slamming into the pushrod..do a cylinder leak down test to see if you have any bent valves...i would start with the cylinder in ?
08-15-2012, 08:06 AM
#26
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My exhaust flaps bang like that. Not steady, nor consistant. It sucks!
But odd that #6 removes the sound!
I would run it again in the dark, easiest to see arcing!
Also think what bent the rod to begin with?
Maybe the replaced rod is bent AGAIN?
Sounds like a piece of something floating around?
Hydraulic lifters?? Stuck? That would bend a rod, thus bend it again too.
On another note, looks like your running it in an enclosed garage? Overhead door was shut
Water running?? just my observation from the video
But odd that #6 removes the sound!
I would run it again in the dark, easiest to see arcing!
Also think what bent the rod to begin with?
Maybe the replaced rod is bent AGAIN?
Sounds like a piece of something floating around?
Hydraulic lifters?? Stuck? That would bend a rod, thus bend it again too.
On another note, looks like your running it in an enclosed garage? Overhead door was shut
Water running?? just my observation from the video
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08-15-2012, 08:26 AM
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I would pull the valve cover an feel the rockers when spinning the motor. I really think its a valve. slapping a lifter back to the cam. You should be able to feel it if I'm right.
08-15-2012, 09:01 AM
#28
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My exhaust flaps bang like that. Not steady, nor consistant. It sucks!
But odd that #6 removes the sound!
I would run it again in the dark, easiest to see arcing!
Also think what bent the rod to begin with?
Maybe the replaced rod is bent AGAIN?
Sounds like a piece of something floating around?
Hydraulic lifters?? Stuck? That would bend a rod, thus bend it again too.
On another note, looks like your running it in an enclosed garage? Overhead door was shut
Water running?? just my observation from the video
But odd that #6 removes the sound!
I would run it again in the dark, easiest to see arcing!
Also think what bent the rod to begin with?
Maybe the replaced rod is bent AGAIN?
Sounds like a piece of something floating around?
Hydraulic lifters?? Stuck? That would bend a rod, thus bend it again too.
On another note, looks like your running it in an enclosed garage? Overhead door was shut
Water running?? just my observation from the video
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08-15-2012, 08:17 PM
#29
Why would the noise disappear with the #6 wire removed if the rocker/valves/piston where contacting other parts or a broken spring? I'd think that those conditions would be there all the time regardless if #6 was powered or not???
The uneven noise is odd, in both sound and irregular clicking
The uneven noise is odd, in both sound and irregular clicking
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Last edited by US1 Fountain; 08-15-2012 at 08:20 PM.
