Scratching noise upon startup that goes away quickly UPDATE Fixed

[thegreatjustino]

For the past year or so, I've had this odd brief scratching sound upon startup. Occasionally it will last longer than you hear in the video, and even more occasionally it will happen when pressing the clutch pedal to shift. 99% of the time it stops after starting and doesn't appear again until the next startup. Does it much more often on cold startup than warm startup.

Anyone have any ideas? The brief scratching sound you can hear just before I ask the passenger what he thinks it is.

 

[ksagis]

In the video it sounds like maybe the bendix on the starter is slow to release but that doesnt make sense if pressing the clutch can make it happen too.

Edit: bad throwout bearing seems to fit all the symptoms?

 

[Yeller]

It could be 2 seprate issues; however, I'd lean to bending spring being weak or broken, it is much easier to check/replace than the throw out bearing.

Edit: Bendix spring

 

[SLOWnEASY]

Kind of sounds like a starter to me. Does it happen if you roll down a hill to bump start it and keep the starter out of the equation?

 

[EPB72]

sounds starter to me , I'd pull starter and inspect bendix ,, suspect its coming apart ,, ,, on rare occasions the drive can contact ring gear on bendix should be visable once out will see markings and probable metal particals.. causes poor flywheel/ring gear fittment on repop parts, of even poor repop starters "NEW" starter.. or poor rebuilds,, ,, or crank shaft end play issue crank gets pushed forward during clutch disengagment, ? way back when there was a .060 shim that was available to space out starter..
but would suspect a starter drive issue

 

[thegreatjustino]

Kind of sounds like a starter to me. Does it happen if you roll down a hill to bump start it and keep the starter out of the equation?

Good suggestion, but I'd need to drive somewhere to find a big enough hill to try.

 

[SLOWnEASY]

Good suggestion, but I'd need to drive somewhere to find a big enough hill to try.

Oh that's right Stockton is pretty flat. You could probably do it in an empty parking lot at 2 mph. Just turn the engine off then key back in run position and put it in second and release the clutch.

 

[dmoses42]

Good suggestion, but I'd need to drive somewhere to find a big enough hill to try.

Multiple story parking garage?

 

[73azbronco]

radio not loud enough? Starter spring my bet, try starting it more.

 

[thegreatjustino]

Well, you guys were right as usual. About six weeks after starting this thread, the failing starter nearly left me stranded at the grocery store.

$130 at the local rebuilder and we're good as new.

Interestingly, the starter is OEM Ford. Considering the history of this Bronco, it doesn't surprise me that it still has an OEM starter.

I doubt this is the original starter from 1967, but can any of you FoMoCo part number gurus tell me an approximate age of this starter based on the part number?

 

[Jetfixr320]

1970?

 

[Chiclassics]

Yep - its from 1970. Perhaps the engine was from later year as well. what engine do you have ?
DOAF-11031

• D = 1970 model-year engineering prefix
• 0 = 1970
• A = Ford passenger-car division/general Ford engineering designation
• F = engineering/application group
• 11031 = starter-related component/engineering number

 

[thegreatjustino]

Perhaps the engine was from later year as well. what engine do you have ?

I bought this Bronco from the original owner. He had the original 289 replaced with a crate 289 in the early 1990s. It appears that the starter that was on the original engine was reinstalled on the replacement engine.

 

[bronco italiano]

Well, you guys were right as usual. About six weeks after starting this thread, the failing starter nearly left me stranded at the grocery store.

$130 at the local rebuilder and we're good as new.

Interestingly, the starter is OEM Ford. Considering the history of this Bronco, it doesn't surprise me that it still has an OEM starter.

I doubt this is the original starter from 1967, but can any of you FoMoCo part number gurus tell me an approximate age of this starter based on the part number?

TGJ, I know a guy that can rebuild that starter if you want. Retired Holt/Catepillar starter/magneto/generator/alternator rebuilder. He is only 84 years young. Lives about 20 minutes from us both.

 

[Steve83]

...can any of you FoMoCo part number gurus tell me an approximate age of this starter based on the part number?

That's not the PN - it's the engineering number for that Aluminum casting, indicating it was designed in 1970. That casting number didn't change every year, so if Ford was still making starters (having starters made) like that today, they'd still be cast with the 1970 engineering number right now. So it can't be older than 1970, but that's all you can tell from that number.

 

[thegreatjustino]

TGJ, I know a guy that can rebuild that starter if you want. Retired Holt/Catepillar starter/magneto/generator/alternator rebuilder. He is only 84 years young. Lives about 20 minutes from us both.

Already rebuilt by Lodi Rebuilders and reinstalled.

 

[jamesroney]

-11131 is the root number for a starter housing. A starter would have a root number of 11001, and would look something like C4OF-11131-B Someone with a MPC could probably find the appropriate starter number for you.

But that aluminum starter housing is a D0AF-11131-D, and it got revised for the 1972 year model to the D2AF-11131-CA which is the 164 tooth short nose housing.

So it would only be native on a production car for the two model years 70 and 71. The date circle will tell you when it was cast, but I can't read it.

Regardless, your 67 Bronco 289 would have left the factory 2-3 years before that starter housing was designed.