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-   -   Help me identify engine noise? (https://www.fordbarn.com/forum/showthread.php?t=264780)

mfarley 06-12-2019 10:36 AM

Help me identify engine noise?
 

My Tudor, after a good 30-45 minute drive at 40mph speeds, makes a rotational scraping noise (tzing-tzing-tzing) at low idle that I believe is coming from the lower engine area. If I shut the engine off and start it again, it goes away until driven the same way again. If I run the engine in higher idle, the noise goes away. Never makes this noise when cold. I've ruled out water pump, generator/alternator, clutch, etc.

My one theory is...could it be the oil pump? Could it be that after running for that length of time, that enough oil is atomized/in the dipper tray and the screen clogged enough that it could be starving for oil? I've not had the pan off recently, so I don't know what condition the pump screen is in.

ryanheacox 06-12-2019 10:56 AM

Re: Help me identify engine noise?
 

Have you gone around with a broom handle or mechanics stethoscope to hone in on where the noise is coming from? If not get the engine to make that noise and see if it's loudest right down by the oil pump.



How did you rule out the water pump, generator and clutch? Did you run the engine with the belt off?


Would be great if you could record the sound.

mfarley 06-12-2019 11:13 AM

Re: Help me identify engine noise?
 

Yes, I've run the engine without the belt. Since it stops when the engine does, running without the belt doesn't usually result in the noise. To chase this, I have run both generator and alternator, two different fan belts, steel fan and aluminum fan, and the water pump is an eighteen months old leakless. I've also spun each of these by hand and no issues. The noise is too low in the engine compartment for me to seriously consider the water pump.

30 Closed Cab PU 06-12-2019 12:11 PM

Re: Help me identify engine noise?
 

How about using your phone camera in video mode, short video/sound, post to u-tube, post a link here to the u-tube video.?

ryanheacox 06-12-2019 12:18 PM

Re: Help me identify engine noise?
 

Yup I would concur that you can definitely say that the noise is not accessory related. Can't think of anything down low that would make that noise sort of noise.


How did you determine that is isn't clutch related?

Farrell In Vancouver 06-12-2019 01:02 PM

Re: Help me identify engine noise?
 

Perhaps you have a starter bolt too long and when the clutch is pushed the flywheel is rubbing the bolt end?

mfarley 06-12-2019 01:10 PM

Re: Help me identify engine noise?
 

I've never done anything with/to the starter. It's been in the car for at least twenty years.

Moving the clutch pedal all the way in or out does not affect the noise.

I'll have to see if I can "prompt" the car to make the noise, and then post it somehow.

Marshall V. Daut 06-12-2019 02:27 PM

Re: Help me identify engine noise?
 

Check your private messages.
Marshall

Mulletwagon 06-12-2019 07:39 PM

Re: Help me identify engine noise?
 

Might suck in some Marvel Mystery Oil just to eliminate any top end possibilities.

BILL WILLIAMSON 06-12-2019 08:11 PM

Re: Help me identify engine noise?
 

"Might" be a vibration in the L/H hood side, or 79,231 other things----LOL
Bill Noisy

monto 06-12-2019 08:34 PM

Re: Help me identify engine noise?
 

Consider the distributor shaft may be thirsty. Mine was. Your description of noise sounds similar. Lube took care of it.

Tom Wesenberg 06-12-2019 09:32 PM

Re: Help me identify engine noise?
 

Could it be the starter drive pinion moving forward and hitting the flywheel teeth?


Very unlikely, but never say never.

30 Closed Cab PU 06-12-2019 09:36 PM

Re: Help me identify engine noise?
 

Quote:

Originally Posted by Tom Wesenberg (Post 1767179)
Could it be the starter drive pinion moving forward and hitting the flywheel teeth?


Very unlikely, but never say never.



To test - remove the starter and hand crank start and see if noise disappears?

katy 06-13-2019 10:36 AM

Re: Help me identify engine noise?
 

I had a similar noise, it was the springs or the plate of the front motor mount where it sits on the crossmember. A little oil shut it right up.

jm29henry 06-13-2019 12:05 PM

Re: Help me identify engine noise?
 

Did you check the throw out bearing in the bell housing there is also a grease fitting that requires grease ,that noise maybe radiating through the bell housing hope this helps Joe !

mfarley 06-14-2019 07:18 AM

Re: Help me identify engine noise?
 

Yes, I had considered the throwout bearing. It's been about 2K miles since I greased it, so it does need to be serviced. Maybe I need to shorten the interval on this one?

ryanheacox 06-14-2019 07:36 AM

Re: Help me identify engine noise?
 

The modern throw out bearings that are sold are sealed for life. Even if they weren't I don't think the method Ford came up with for getting grease up to the bearing is very effective.

Dave in MN 06-14-2019 08:00 AM

Re: Help me identify engine noise?
 

Monto (post#11) may have properly suggested to oil your distributor. If your distributor is putting extra load on the oil pump drive gear, the loaded drive gear can cause the camshaft to walk forward and make a grinding noise as it bottoms against the plunger and spring.
This condition usually results in a thumping or knocking noise but maybe....
It is an easy test to add some oil.
Hope you find the cause soon. Let us know what it is if you do.
Good Day!

TerryH 06-14-2019 08:33 AM

Re: Help me identify engine noise?
 

One other thing to check: if you have engine pans check to be sure that one of the mounting flanges hasn’t broken. Tom Endy alerted that to me when my A was making a funny noise, and that was the cause. He had experienced it before, usually with repro pans.

Benson 06-14-2019 06:38 PM

Re: Help me identify engine noise?
 

Quote:

Originally Posted by Tom Wesenberg (Post 1767179)
Could it be the starter drive pinion moving forward and hitting the flywheel teeth?


Very unlikely, but never say never.


To: Tom W,


I have seen it happen 4 or 5 times on my car and customer's cars in 40,000 miles in the 60's when using A as daily driver and working at Restoration shops.




I used to post about this problem and other oddball problems that I have seen in 55 years but after several "POOH POOHs" ... i quit posting about them altogether.


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