Ear Piercing Squeal

[ford3]

my guess is the carb or carb gasket simply because every thing was all right till the carb was changed, the chirp every half rev is one piston sucking air on the intake stroke

[super flat]

Originally Posted by ford3

my guess is the carb or carb gasket simply because every thing was all right till the carb was changed, the chirp every half rev is one piston sucking air on the intake stroke

That is my bet also and it is easy to spray that front seal too.

[1crosscut]

Marty it is not clear to me in your post if this is the first time that the engine was started after the rebuild or it has been running okay and just started making the noise after the carb work.
If it is the first start I would say that the spring between the timing cover and cam shaft has no lubrication. Pull the cover and lube it.

[midgetracer]

I second 1Crosscut. It sounds like the cam plunger was not lubed when put together. It makes a serious scream.

[Mike V. Florida]

Originally Posted by midgetracer

I second 1Crosscut. It sounds like the cam plunger was not lubed when put together. It makes a serious scream.

Pulley could be hitting.

[Tom Wesenberg]

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Originally Posted by midgetracer

I second 1Crosscut. It sounds like the cam plunger was not lubed when put together. It makes a serious scream.

That was my first thought also because I had it happen on an engine I installed for a customer. I did several short runs trying to figure out what it was. I removed the side cover and saw there was a flood of oil going onto the timing gear, so I figured the pluger should get oiled in no time. Actually it took several short engine runs before the squeal quit. It was probably close to 3 hours total of run time before the noise was gone for good. Until then the noise would come and go at times.

Oil the flat spring on the front motor mount, in case it's dry and squeaking.

[marty in Ohio]

Thanks for all the suggestions. We'll try to pinpoint the problem. In answer to Dave's (1 crosscut) question - this is a recently rebuilt engine, but it has been run and has probably 100 or so miles on it. Lots of rain and flooding in northern Ohio today so we may have to wait a couple days before we can get to the car.
Thanks again for all your answers
Marty

[marty in Ohio]

Well, you guys have come through again!! The squeal was actually a bad gasket between the carb. and the intake manifold just like ford3 said. We started the engine this afternoon and it screamed like a banshee. I put my hands around the carb. and released them a couple times and the noise changed. We put on another gasket and the noise was gone. We left the Tillotson on and will rebuild the Zenith.
I can't say enough about the help I have gotten from Ford Barn. It's like you guys are looking over my shoulder telling me what to try next.
Thanks again for the help.
Marty