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Old 07-09-2013, 04:14 PM
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Starter is making a crazy loud banging sound

Ok here's the story. I have a 1980 Firebird, I just swapped in a crate Chevy 355 about 2 months ago. Everything ran amazing broke the engine in and have been having tons of fun. Then I go to swap a new Holley DP onto the engine. Simple swap really besides having to reroute a few vacuum lines because the Holley has one less port than the Edelbrock that was on it. So I got that all taken care of, I go to fire it up, it turns over and runs for a minute, then I see I have a little fuel line leak, I cut the car off, go fix it.

I hop back in and try to turn it over when all of a sudden my starter makes a crazy screeching sound, then a loud bang. Then all it would do is make the banging sound when I tried to turn it over. I pulled the starter and the solenoid case was actually cracked on it! So I returned it to Advanced and got a freebie because it was still under the lifetime warranty and I just put it in that car like 2 years ago.

So I get home today, throw the nice new starter in, and it's working great for about 10 minutes as I'm cranking the engine and tuning the new carb. Then all of a sudden that exact same banging sound happens. And now I'm back to having a car that won't start and a starter that sounds like a jack hammer.

Not sure exactly what's happening. Do you think it needs a shim? Something happened to my flywheel or engine? It ran perfect up until just a few days ago. Nothing notable happened.


And to make everything super easy, you can skip everything I just said and watch this video I took of me flicking the key really quick and you can get an idea of what's happening.


https://www.youtube.com/watch?v=GN105Jyx5iY

So there it is. That's the loud crashing sound it will just do over and over as long as I hold the key. It's sounds horrible. I'm at a lose.

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Old 07-09-2013, 04:38 PM
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my KARMA ran over my DOGMA
 

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Check the torx convertor bolts, when they get loose it is one hell of a racket

If its an auto trans that is,,,?

TJ

Last edited by Custom10; 07-09-2013 at 04:48 PM.
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Old 07-09-2013, 05:24 PM
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Pull the dustcover & ck TC & flywheel bolts.Check for broken missing teeth on flywheel.If all looks ok'you prolly need to shim your starter.
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Old 07-09-2013, 06:51 PM
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Trans is a turbo 350. The teeth on the flywheel look ok from what I can see. Haven't checked the bolts yet.
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Old 07-09-2013, 08:43 PM
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Did you use the correct knurled head starter bolts?
Do you have a starter brace?
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Old 07-09-2013, 09:03 PM
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It's not shimmed right..But the biggest problem is,,, All the new starters are machined wrong or something... I Had this problem with about five cars... All chevy's... Even broke the nose off a Napa and a power master starter... I bought a little mini stater off ebay and never had anymore trouble..
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Old 07-09-2013, 09:08 PM
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Did you make sure your teeth match on the fly wheel and starter ????
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Old 07-10-2013, 08:44 AM
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Gotta love a turbo!
 

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If all this started after swapping on the Holley, maybe your floats are adjusted so high or the needle and seats are contaminated so that fuel is spilling into the engine and hydro-locking it. Check the oil for gasoline and when you get another starter, try spinning it with the plugs out and see if it acts normal.

Russ
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Old 07-10-2013, 12:03 PM
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starter shim

LIKE NEW SAID...I've found that a lot of the cheap auto parts SBC starters have repop noses that the mounting pad is too thick and actually require milling to make fit properly. Also the bendex shafts like to bend when starting something with compression.

YOu can use a paper clip to check the clearance between the flexplate and starter teeth by removing the converter cover and using a screw driver to lever the bendex forward. Make sure you disconnect the battery first.

Also If your timing is too advanced the engine can kick back and damage the starter as well.
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Old 07-10-2013, 02:57 PM
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Quote:
Originally Posted by S10xGN View Post
If all this started after swapping on the Holley, maybe your floats are adjusted so high or the needle and seats are contaminated so that fuel is spilling into the engine and hydro-locking it. Check the oil for gasoline and when you get another starter, try spinning it with the plugs out and see if it acts normal.

Russ
I believe this is definitely what happened. I checked my oil and it smells like gas. And right before it locked up both times I did see fuel spew outta the carb.

Do you think any damage could have happened to the engine rings seals or internals? I'm gonna do an oil change asap and throw my Edelbrock back on. What would be the best way to tweak this Holley to not do this anymore?

Last edited by valtiel43; 07-10-2013 at 03:06 PM.
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Old 07-10-2013, 03:09 PM
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Coulda bent a connecting rod.Lotsa things can happen with hydrolock.
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Old 07-11-2013, 08:26 AM
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Gotta love a turbo!
 

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Quote:
Originally Posted by valtiel43 View Post
I believe this is definitely what happened. I checked my oil and it smells like gas. And right before it locked up both times I did see fuel spew outta the carb.

Do you think any damage could have happened to the engine rings seals or internals? I'm gonna do an oil change asap and throw my Edelbrock back on. What would be the best way to tweak this Holley to not do this anymore?
Coulda washed the rings, coulda bent a rod. Running a compression check should give you an indication. If the Edelbrock ran OK, the fuel pressure is prolly not too high. Worth checking it though... There are procedures online for checking the float levels and it's easy to pull and inspect the needle and seat assemblies. You said the Holley was "new", so it's hard to imagine any trash in these unless there's trash in the gas. If it's not new, check the floats, brass ones can get holed and sink. No telling what problems ethanol based gas can cause!

Russ

Russ
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