loud momentary screech when starting
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
loud momentary screech when starting
This noise used to happen every time before when I had all the old stuff in the engine bay, when starting the car there would be a very loud high pitched screeching noise when cranking the car with the key held all the way to the right while cranking. I thought it might be the old starter.
Once I got my car back from the shop it would just start right up every single time except last night when I started it and it made that loud screech again. What happen was the first time I cranked it, it made that screech noise so I let go of the key. I switched off the ignition and the 2nd time it fired right up.
Is this a starter issue?
Once I got my car back from the shop it would just start right up every single time except last night when I started it and it made that loud screech again. What happen was the first time I cranked it, it made that screech noise so I let go of the key. I switched off the ignition and the 2nd time it fired right up.
Is this a starter issue?
Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
Usually it's a worn or loose V belt that screeches when the engine fires up.
Never heard a belt screech when turned by the starter motor.
Sounds like starter to ring gear not meshing properly.
What did they work on at the shop. ?
Never heard a belt screech when turned by the starter motor.
Sounds like starter to ring gear not meshing properly.
What did they work on at the shop. ?
Last edited by bazza77; Jul 4, 2019 at 10:20 AM.
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
screech while cranking? probable starter issue. or screech as soon as engine fires and you rev it to 2500 or so. second screech is alternator charging like crazy cuz it sees low volts of a battery that was just busy. but the belt is loose so it slips. the alternator load rarely gets that high while running. so the squeal goes away pretty quick depending on how loose the belt is.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
they did a whole top end rebuild with new carb, cam, intake, heads, distributor, starter, all pumps etc, still has the old v belt setup (new belts) not serpentine, new pulleys etc.
Last edited by titanle; Jul 4, 2019 at 10:39 AM.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
screech while cranking? probable starter issue. or screech as soon as engine fires and you rev it to 2500 or so. second screech is alternator charging like crazy cuz it sees low volts of a battery that was just busy. but the belt is loose so it slips. the alternator load rarely gets that high while running. so the squeal goes away pretty quick depending on how loose the belt is.
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
sounds like a starter or starter alignment issue. harder fix than tightening a belt. any shims between starter and block? remove 1 at a time. if starter needs shims it sounds like it is gnashing it's teeth when cranking.shim too much and it slips and screams.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
is this something that can cause damage that should be addressed immediately?
Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
I'm not sure if there are any shims between the starter and the block, i'll have to ask my mechanic. The car will be going back to have the carb rejetted once the vettepack inserts are installed so I will address the issue at that time.
is this something that can cause damage that should be addressed immediately?
is this something that can cause damage that should be addressed immediately?
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Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
Sorry I missed that they did work on the starter ? well if you told them it had a problem and they were supposed to inspect /fix it , then ring them up and let them know what its doing straight away . If they are conscientious they should tell you to bring it back asap.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
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From: Vancouver, BC
No I meant all those parts listed were replaced with brand new parts.
Melting Slicks
Joined: Jul 2010
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From: perth western australia
Team Owner
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From: altered state
St. Jude Donor '05
Too many dont know that a starter has to have proper gear mesh. Just popping a new one in without checking that can hurt those gears.
Youll know by looking at the teeth...if it still does it take your belt off then start it. If its only while cranking then-
Most times its a PS belt, one reason I got rid of the factory setup.
Youll know by looking at the teeth...if it still does it take your belt off then start it. If its only while cranking then-
Most times its a PS belt, one reason I got rid of the factory setup.
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
Too many dont know that a starter has to have proper gear mesh. Just popping a new one in without checking that can hurt those gears.
Youll know by looking at the teeth...if it still does it take your belt off then start it. If its only while cranking then-
Most times its a PS belt, one reason I got rid of the factory setup.
Youll know by looking at the teeth...if it still does it take your belt off then start it. If its only while cranking then-
Most times its a PS belt, one reason I got rid of the factory setup.
Melting Slicks
Joined: Jul 2010
Posts: 3,176
Likes: 633
From: perth western australia
Yeah it's like a lottery , you might have a damaged area on the ring gear now , but just luck that it never stopped at that position .
Thread Starter
Burning Brakes
Joined: Jul 2013
Posts: 963
Likes: 57
From: Vancouver, BC
I wonder if maybe it was just a crappy starter to begin with, I bought on eBay for like $80. This is the description "SBC BBC Chevy 3HP Mini Starter Red - Dual Inline 153 168 Tooth 305 350 396 454"
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
The gear on the Bendix should extend into the ring gear about three-quarters of the way.
The gap between the Bendix gear and the ring gear should be about the width of a paper clip.
The original starter bolts were knurled to hold the starter securely, what kind of bolts do you have on your starter?
The gap between the Bendix gear and the ring gear should be about the width of a paper clip.
The original starter bolts were knurled to hold the starter securely, what kind of bolts do you have on your starter?
Instructor
Joined: Jun 2018
Posts: 110
Likes: 3
Hello
I saw your post about a screeching noise
I too have a 68 and it will make this noise on occasion.
I believe it is a belt in my case.
What I did to find root cause.
Started car by pumping accelerator twice, it would make the noise.
Once car was warm, I put it into neutral did not pump gas and it starts without making noise.
In my mind the torque of the motor overwhelms the friction coefficient of the belt and I have slippage thus the noise.
I need to replace pulleys and belt and set belt tension with belt tension gauge.
I see you had your pulleys replaced and belt I also know NAPA /Goodyear belts are much better than many others.
Hope this helps
Mike
I saw your post about a screeching noise
I too have a 68 and it will make this noise on occasion.
I believe it is a belt in my case.
What I did to find root cause.
Started car by pumping accelerator twice, it would make the noise.
Once car was warm, I put it into neutral did not pump gas and it starts without making noise.
In my mind the torque of the motor overwhelms the friction coefficient of the belt and I have slippage thus the noise.
I need to replace pulleys and belt and set belt tension with belt tension gauge.
I see you had your pulleys replaced and belt I also know NAPA /Goodyear belts are much better than many others.
Hope this helps
Mike