2002 Honda CRV Engine Vibration

Tiny
LIVEDATA
  • MEMBER
  • 2002 HONDA CRV
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 119,000 MILES
Hello all. I have a 2002 Honda CRV LX 2.4L 2WD. I would like to narrow down a vibration issue. So if the car is in Park, engine running & idling at 750 RPM, there is a continuous mild rumbling sound accompanied by little steering wheel vibration. However, when I give it gas, the vibration increases, but it occurs in precise cycles. If I sit in the car, and I lock the engine speed at say 1800 RPM with foot, it will idle smooth for exactly 2 seconds, and then a wave of vibration passes through the cabin that lasts for 5 seconds. It's not sudden, it picks up gradually the first 2 seconds, loudest at 3, then gradually goes away the next 2 seconds. As I mentioned thecycle is very precise.

My guess is if these were mount issues, the vibration would be constant. I suspect harmonic balancer, which overall looks ok visually, despite some very little wobble which smoothens out with higher revs, but still won't rule it out. I have disengage the drive belt from all the other accessories to make sure it's not a loose belt or something, but the vibration is still there. Someone out there on the net suggested valve adjustments, but
for now I'd like to keep my focus on exterior parts. Thanks.

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Thursday, May 29th, 2014 AT 9:19 PM

4 Replies

Tiny
HMAC300
  • EXPERT
Check belt and tensioner recommended replacement is 60k
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Friday, May 30th, 2014 AT 6:51 AM
Tiny
LIVEDATA
  • MEMBER
Thanks hmac, I have already disengaged the serpentine belt from pulley's so that just the crankshaft pulley is rotating, the vibration can still be felt.
It is rather weird, say if I keep the accelerator pedal locked at 2000 rpm, it produces a cycle type vibration. For 2 seconds it's a silk smooth "iiiiiinnng" like the one you'd expect from a Honda, and then next 2 seconds the cabin is filled with a deep roar and steering wheel vibration, then back to a silk smooth and back to the roar. It just goes on. This is best I could explain it in drawing

The straight dashes being the smooth phase.

I think I am left with no more than to get a live data reading from the a shop or the dealer, and see if any abnormal values are present. I was pretty
sure about it being the harmonic balancer, but each time I fire up the engine
and notice that hairline wobble become still as stone after giving it the slightest throttle, I am convinced that that isn't it either. Quite frustrating this is.
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Friday, May 30th, 2014 AT 9:56 PM
Tiny
LIVEDATA
  • MEMBER
Disregard those line drawings, looks like the they got edited.
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Friday, May 30th, 2014 AT 10:00 PM
Tiny
HMAC300
  • EXPERT
It may be a light misss, try cleaning the throttle plate on both sides and iac hole with choke cleaner also check for a vacuum leak and finally check your motor mounts for cracks etc.
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Saturday, May 31st, 2014 AT 5:57 AM

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