450 Sqealing

[BarnyardEngineering]

Carb cleaner I assume?

That will work too. You're just looking for a change in the noise.

 

[BarnyardEngineering]

Could be a bad bearing I suppose. Easy to check, just drain the oil and look for glitter.

Mac

Pretty sure a rod or main bearing would be a knock, not a constant squeal.

 

[Mac AR]

Pretty sure a rod or main bearing would be a knock, not a constant squeal.

My thoughts also, but stranger things have happened. I still say there's something on the outside of the motor that's making that noise, not inside. But I can't confirm that since I'm not standing next to the machine.

Mac

 

[DaveBN]

Is the breather cap or vent cap plugged. Vent cap would make sense if it doesn't squeal right away at start up.
Maybe dry bushings in the distributor? Long screw driver or wooden dowel in your ear then the other end pushed tight on various engine parts will help locate your problem as stated earlier.
Dave

 

[rustred]

No separate ps pump. the alternator is on other side and moves freely.

What would be inside the block that could be doing that? Spun bearing on something? With fan belt off and still makes the noise it take the water pump out of the equation too?

Is this possible? "may have a leak in the intake manifold or carburetor gasket leaking, causing squeal like blowing across a piece of cellophane."
It is in that general location

the only squeal i usually hear on an engine is when the alt belt is loose , and when u rev up the engine they squeal like crazy. not sure how u would get a squeal from inside an engine running in oil. if its an actual squeal your talking about.

 

[cdd]

Is the breather cap or vent cap plugged. Vent cap would make sense if it doesn't squeal right away at start up.
Maybe dry bushings in the distributor? Long screw driver or wooden dowel in your ear then the other end pushed tight on various engine parts will help locate your problem as stated earlier.
Dave

Vent cap? What is that?

 

[Janicholson]

Vent cap? What is that?

On a 450 Farmall there is no vent cap. It has a PCV is connection from the valve cover to the air cleaner, but that is more of a static orifice device not subjected to manifold vacuum. it also has a vent tube on the filter dide. Jim

 

[cdd]

Is it a solid squall or a "squeak squeak squeak" thing?
If not solid, could be rocker arm.
Jim

Solid squall

 

[cdd]

I have changed the oil and nothing significant to report there. No shavings etc.
I used carb cleaner and found a small leak around the manifold by no 2 cylinder.
I will take the carb off to clean and might as well take the tappet cover off, what if anything should I look for in there?
Oil pressure is good.

 

[cdd]

My thoughts also, but stranger things have happened. I still say there's something on the outside of the motor that's making that noise, not inside. But I can't confirm that since I'm not standing next to the machine.

Mac

I agree, there is not much on that side of the motor(where the noise is the loudest)

 

[cdd]

I've heard alternators have a sort of a whining squeal to them but not usually very loud more of a subdued lower level sound. A suppose a bearing could be going bad in the alternator though. Tappet cover off would tell if the rocker arms are oil starved. What is the oil pressure if good change it and no particles in the oil refil change filter cut open and look at then run it if an oil starved tappets they may just clean up with new oil. Our MD missed till we run it steady hauling manure when we got it. Had been setting on the dealers lot for a bit before we got it. Running it hard as we could on the spreader and changing the oil freed up the change over valve or whatever was causing the miss. Then would come back till run for awhile again. Since it was winter we just used it and in a month or so it cleaned up such that the miss was gone.

I ran it with out the belts on, so the alt was not spinning but I still got the noise.

 

[Mrfred54]

Should remove manifold if you found a leak and make sure the mating surface is true with straight edge

 

[Janicholson]

I have changed the oil and nothing significant to report there. No shavings etc.
I used carb cleaner and found a small leak around the manifold by no 2 cylinder.
I will take the carb off to clean and might as well take the tappet cover off, what if anything should I look for in there?
Oil pressure is good.

The only reason to remove the tappet cover off is if there is a leak, or you are replacing a tappet/rebuilding. Fix the manifold gasket and have tha manifold to head surfaced flattened at a machine shop! Jim

 

[Mac AR]

I will take the carb off to clean and might as well take the tappet cover off, what if anything should I look for in there?

Absolutely no need to take the tappet cover off. Do as @Janicholson says, have the manifold surfaced and put a new gasket on there. Clean and kit the carb while it's off if you want but if the tractor runs good there's really not even a need to do that.

Mac

 

[cdd]

I have the manifold and carb off and working on them, need to replace a stud as well. Where the leak was the stud was stripped.

 

[used red MN]

You also had the fan belt off the water pump and run it that way? Try operating the fast hitch if it
Has one or dead a hydraulic remote to see if that makes a change.