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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: gildardo01 on November 17, 2012, 06:42:44 pm

Title: what went wrong? broken teeth flywheel
Post by: gildardo01 on November 17, 2012, 06:42:44 pm
ok, for those of you that remember reading my last thread about using a ford ring on a chevy..... well i did change the ring to a new one... so everything is perfect on the new engine.... i bolted it back in the truck, installed tranny, drive shaft everything... went over everything 2-3 times... you can turn the engine with about 35-40lb of torque in neutral... so that means its nice and smooth... anyways i started to crank the engine to get it up and running to brake it in... then all of a sudden after a few turn some teeth broke off from the flywheel and the starter just spins, i took the starter out and noticed the 3 teeth half broken... how did this happen... i know i can just turn the engine by turning the alternator or directly at the crank and give it another shot... but first i want to make sure it wont happen again... don't want to end up with a toothless flywheel... any ideas why this happened... the flywheel was in great shape when I installed it...
Title: Re: what went wrong? broken teeth flywheel
Post by: gildardo01 on November 17, 2012, 06:53:19 pm
i also installed new LUK clutch, and the flywheel was resurfaced for the first time...
Title: Re: what went wrong? broken teeth flywheel
Post by: ralphhemi on November 17, 2012, 07:17:16 pm
Have you checked the starter to flywheel clearance ? I like the size of a paper  clip between the starter drive and flywheel
Title: Re: what went wrong? broken teeth flywheel
Post by: gildardo01 on November 17, 2012, 07:23:55 pm
Quote from: ralphhemi on November 17, 2012, 07:17:16 pm
Have you checked the starter to flywheel clearance ? I like the size of a paper  clip between the starter drive and flywheel
no i havenīt checked it since it was the starter i used before, and the same flywheel.... but thats one of the things iīll be checking for tomorrow...
Title: Re: what went wrong? broken teeth flywheel
Post by: Blazin on November 18, 2012, 01:29:58 am
Is it the right tooth count flywheel to match the starter?
Title: Re: what went wrong? broken teeth flywheel
Post by: gildardo01 on November 18, 2012, 07:16:33 am
yes, the right tooth count is on the flywheel, they were used together before....
Title: Re: what went wrong? broken teeth flywheel
Post by: gildardo01 on November 18, 2012, 11:59:53 am
so, i reinstalled the starter, and turned the engine by hand enough so it would be able to crank... it started right way, and i was able to brake in the engine with no problem what so ever.... what are the chances that the starter will be in the position where the teeth are missing when it shuts off.... i canīt imagine the problem if this happens at a red light for example.... seems the odd are fairly high though...   
Title: Re: what went wrong? broken teeth flywheel
Post by: Blazin on November 19, 2012, 09:02:09 pm
Don't shut it off at a red light!  ::)

Every hear of Murphy's law?