Can the ignition coil make noise?

[StockMan]

I've been all over under the hood and around the trans with a good scope and the closest place I heard anything abnormal was around the oil pump.   And that was very minimal if not the natural sound from that area.  That being said, the distributor shaft has me thinking now, with it being an extension of that area.  And, that shaft was the same one I had in the other motor I believe, so it would be worth checking that out.
The motor mounts and PCV are the same as well, mind you the sound was still there with the PCV unhooked.

I took the car out today and the sound has subsided, until I got to 170/180 then I could hear it after doing 50 or and letting off the gas.
Its always seemed to be that its directly related to the engine vaccum.

By the way, I've got good oil pressure and run at a consistent 170.
Thanks for all the ideas.

[StockMan]

I was out last night and found that after letting off the gas at around 4mph or so, at operating temp, the squeak becomes constant, and persists until RPMS are down to close to idle.  The squeak will go away if I 'Tap' the throttle under these conditions.  The other thing that's the same on this new motor is the oil pump.  I'm starting to think that this could be it.  This particular pump is a 'High' volume one.  I have a couple of other pumps here that I may try.

Anyone experience squeals or noise from the oil pump?

[A383Wing]

one would think with all the oil flowing through there, that there should not be anything that would not be lubricated....get a stethoscope with long rod on it and touch everything you can with it.

Bryan

[ws23rt]

One problem we have when something odd happens is we too quickly tell ourselves what it can't be and move on.  When we do that we limit the possibilities.
So many times in the past I came back to something that was overlooked or missed.
My thought about an oil pump making a squeak sound? A squeak comes from dry metal rubbing.(followed by rapid wear).  Not to rule it out but if you have oil moving-the pump is lubricated. The shaft that drives it gets oil from the engine (from the pump).
If your distributor is the same one from before check that. Not sure what distributor you have but many older ones have a flip top port where one adds oil for the upper bearing.

[StockMan]

Thanks again for your replies.

I have the stock distributor for the 68 440 with points.  
I probably should pop it out and make sure the upper distibutor bushing is sufficiently lubed,
although I did do this during assembly of the motor.  
As far as the oil pump making this noise, I agree, it doesn't sound logical with it being submerged in oil, but I'm out of ideas at this point.  And again, whats puzzling to me is that the same noise is there after swapping out the 383/727 for a completely new engine/trans.

Here are the things that are the same after the swap.
- Oil pump
- Coil/plug wires/dist cap
- Water pump/PS pump/Alternator (although the sound is there with belts off)
- Motor mounts
- Exhaust manifolds
- PCV valve
- And oil pump shaft I think...

Other facts...
- Initial running of the new motor didn't make the sound (first 70-80 miles or so).
- The sound seemed to develop after working with the timing.
I originally was running the motor without vaccum advance but then made some adjustments to it and am now using it.
This is around when the sound began I beleive.

I'll see if I can record the sound and post it up.

Thanks

[PlainfieldCharger]

Does the inside of the Distributor cap have allot of carbon tracking  That could be the sound your hearing... almost a white noise..

[A383Wing]

One more time...go to store like Harbor Freight and buy a mechanics stethoscope and find noise with that..

it won't take long, and cost is under $10....take off yer belts & run engine...you will be surprised at what you hear with that tool

Bryan

[Ghoste]

I think he did that.

[fy469rtse]

  reminds me of a noise that drove me crazy in my 68, soft rattling , got worse under full lock in steering , thought it was headers , they were close , dimpled them slightly for more clearances, nothing worked, looked at many things , about a year later turned radio up so not hear it in all this time , I was removing engine to redo engine bay and the install new stroker engine, guess what I found , a 7/16 ring open end spanner that I had dropped and landed in gussets mounts to steering box , and just sat there and rattled, unseen with engine in  keep looking you will find the source ,  I also had a strange noise from around distributor once , a squeaking noise , turned out that was a worn , shortened because of wear, pump push rod, also cause fuel related issues because pump lever arm was not being extended full travel,

[StockMan]

Finally figured it out, the 'Churp/Squeak' noise I've had to live with all this time ended up being the oil pump.  The pump started to leak recently so I took it apart to change the O-rings, and no more noice.  I guess the pressure/suction was causing the pump to maybe pull in a bit of air, resulting in the noise.  It went for quite a while making the noise, but was not leaking any oil...