Bosch SR17X noise diagnosis

[70Crew]

I replaced my original starter with a SR17X auto starter. I bought it through Amazon but it came in a Bosch box with a Bosch warranty. It is installed and starts the bus well. However, when it is engaged to the flywheel and under load, it makes a sound that can best be described as the noise a cat makes when you step on it’s tail… a high-pitched screech. Since this is a different model than the one I pulled out, I have nothing to compare it to, but I’d be really surprised if this is how it is supposed to sound.

I drove it by the local reman shop and let them hear it under load. I then pulled the starter and took it back for diagnosis. It did not make the same sound on the bench when not under load. They said the internal bushing looked dry so they soaked the point where the shaft exits the case with oil. I installed it today and am getting the same screeching noise.

My question… is this the noise they all make under load? If not, any suggestions on what I can do to fix it? If nothing obvious, I’ll just send it back, get a refund, and stick with a manual starter. However, it starts so quickly with this upgraded starter that I’d like to keep it if I can.
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1970 Crew Cab

[Wildthings]

If you ran with a bad starter bushing for long enough you may have damaged the teeth on the ring gear and thus your noise.

[70Crew]

[aeromech]

The one I bought from Amazon recently arrived with the wrong motor. It was smaller by about an inch than it should have been. I sent it back. The next one that came was correct. Amazon makes returns pretty easy
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
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DC9/MD80
BAe146
Fokker F28/F100
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VW Type 2 1971 (3 ea.) 1978, 1969
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Capable of leaping tall buildings in a single bound

[70Crew]

[aeromech]

I have my own for my engine run stand. The recent one was for a customer. There was a notable difference between the two. I believe the bigger motor has more power too.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[70Crew]

I am assuming the ones you have installed don’t make the screeching sound I described? Just trying to make sure that isn’t normal before I return it.
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1970 Crew Cab

[Wildthings]

I would say that it is not normal

[aeromech]

Not normal. Send it back and try another one.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[Brian]

Noise sounds like a cat being stepped on, but starts the truck nicely.
I agree with the above, we just need to swap another new one in. My guess is that a bearing has crud in it and scored something.
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Wash your hands

'69 Bug
'68 Baja Truck
'71 Bug
'68 Camper

Only losers litter

[aeromech]

They call them "rebuilt" but I'll bet they just clean, inspect, and paint mostly. Obviously they don't bench check them
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[70Crew]

Just to close the loop on this.... I requested a replacement from Amazon and they were on back order until this week. My truck was already in winter storage and I really wasn’t looking forward to swapping the starter in 20 degree weather but I had to return the old one within a week. I don’t know why but I really thought the second one was going to make the same noise. If that had happened, I was going to go back to the original style. Low and behold, the replacement worked! These auto starters crank fast... a nice upgrade. Keep an eye on Amazon, I paid $103 shipped, and it was rebuilt by Bosch.
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1970 Crew Cab

[raygreenwood]

[skills@eurocarsplus]

[wcfvw69]