96 caravan 3.3 engine noise.

Mine has a vapor canister purge valve that taps like that. Look for a
plastic piece that has 2 sphere shapes built in to it on the passenger side
under the hood. It'll have a plug-in and vacuum lines running to it.

You can grab ahold of it and feel it clicking away... It's probably not your
engine at all.


"Bob Urz" > wrote in message
...
> My buddy just bought a 96 caravan with 3.3. It seems to run fine.
> He did notice a small noise he perceived to be coming
> from the passenger side occasionally when he was driving.
>
> I opened the hood and listened while the engine was idling.
> I could hear a noise with a repetition of about 3 time a second.
> I could only notice it on the passenger side engine compartment . I did
> not seem to notice it on the drivers. It did not sound like piston
> slap, and it was not deep enough to sound like a rod. I tried to
> localize it on the passenger side engine compartment, but i could not.
> Any ideas on what to look for or what it could be?
>
> Bob
>
>
>
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Hmmm, not deep enough for a rod knock and not ticky enough for a lifter,, I
would suspect a crack timing gear,, but it's just a guess.

Hmmm, not deep enough for a rod knock and not ticky enough for a lifter,, I
would suspect a crack timing gear,, but it's just a guess.

Ted wrote:

> Hmmm, not deep enough for a rod knock and not ticky enough for a lifter,, I
> would suspect a crack timing gear,, but it's just a guess.

I missed the original description of the noise, but when the rocker
shaft tower on a 3.3L cracks, the first symptom is a light clicking.
The engine doesn't run badly until the rocker shaft itself fatigues and
bends, causing the valves to not open properly.

Ted wrote:

> Hmmm, not deep enough for a rod knock and not ticky enough for a lifter,, I
> would suspect a crack timing gear,, but it's just a guess.

I missed the original description of the noise, but when the rocker
shaft tower on a 3.3L cracks, the first symptom is a light clicking.
The engine doesn't run badly until the rocker shaft itself fatigues and
bends, causing the valves to not open properly.