engine rattle
#1
Super Moderator
Thread Starter
engine rattle
When my engine is under load, and I press the accelerator, there is a very brief (maybe one second), faint, muffled rattle. Like a diesel engine. Especially when going uphill. It doesn't happen in P/N. Is this normal?
2013 5.3L with VVT
(71,000km/44,000mi)
2013 5.3L with VVT
(71,000km/44,000mi)
#2
Few questions:
1. Has it always done this? if not, when did it change?
2. Have you had or done any work on it lately?
My van was making a rattle like this. It would happen at a specific RPM under load. My first thought was valve clatter or pre-detonation so I put in the high octane fuel with a booster additive but no change. I checked the timing and while the dog house was off drove around and listened.
I started touching everything in sight and turns out the noise was a loose A/C bracket bolt. I guess the previous owners mechanic forgot to tighten it. At a certain RPM the harmonics were just right and drove me crazy.
Just a possibility... could be something loose.
Good luck
John
1. Has it always done this? if not, when did it change?
2. Have you had or done any work on it lately?
My van was making a rattle like this. It would happen at a specific RPM under load. My first thought was valve clatter or pre-detonation so I put in the high octane fuel with a booster additive but no change. I checked the timing and while the dog house was off drove around and listened.
I started touching everything in sight and turns out the noise was a loose A/C bracket bolt. I guess the previous owners mechanic forgot to tighten it. At a certain RPM the harmonics were just right and drove me crazy.
Just a possibility... could be something loose.
Good luck
John
#3
Super Moderator
Thread Starter
1. Hard to say. I've been driving my van a lot more than usual lately. It might be a new problem, or it could just be that I have become more attuned to its sounds over time.
2. The only work to the engine I've done during my ownership (last 12,000 mi), is replacing the oil + filter, air cleaner and coolant. None of them lately.
I think if there were a loose part related to RPM, I would also hear it in Park or Neutral, as well as while decelerating. The engine doesn't vibrate a great deal either.
2. The only work to the engine I've done during my ownership (last 12,000 mi), is replacing the oil + filter, air cleaner and coolant. None of them lately.
I think if there were a loose part related to RPM, I would also hear it in Park or Neutral, as well as while decelerating. The engine doesn't vibrate a great deal either.
#5
Super Moderator
Thread Starter
the bulletin applies to vans from 2002 - 2004
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bukipup
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September 19th, 2007 2:11 PM