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Chevrolet Repair/Timing Belt Broken

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Question
QUESTION: Hello sir,
I was taking a slow u-turn in my chevrolet optra manual car when it turned off..I tried to start but it didnt. I came to know that timing belt is broken. I was not aware of the technicals so i tried several times to start the car..but it did not..then I put in first gear and tried to start to give it a push to park it 3 meters from the incident spot...When I reached home I googled and came to know that it damages engine if tried to start the car. I would like to know how much damage I have done to engine this way? I left my car in parking and came back home. I will goto mechanic tomorrow

ANSWER: HI WASEEM, WELL YOU HAVE A 50-50 SHOT THAT YOUR ENG WILL BE OK..YOU SEE WHEN THE TIMING BELT BREAKS IF THE VALVES ARE IN THE OPEN POSITION WHEN THE PISTON COMES UP IT WILL BEND THE VALVE OR VALVES..AS FAR AS YOU CRANKING THE ENGINE OVER IF THE DAMAGE HAPPENED WHEN IT BROKE YOU DID NOT CAUSE ANY MORE DAMAGE..BECAUSE USUALLY WHEN THIS BELT GOES BAD THE CAM STOPS TURNING INSTANTLY UNLESS THERE ARE A FEW TEETH ON THE BELT LEFT CAUSING IT TO GRAB THE CAM AND TURN THE CAM OVER MORE..BUT AGAIN YOU WILL NOT KNOW ANYTHING UNTILL THEY PUT THE BELT BACK ON THE ENG AND SEE IF IT WILL START,OR THEY COULD DO A CYLINDER LEAK DOWN TEST PRIOR TO INSTALLING THE NEW BELT. THIS WAY YOU WOULD KNOW IF ANY OF THE VALVES BENT..THINK POSITIVE AND I HOPE ALL GOES WELL FOR YOU..GOOD LUCK,,,,TOM..

---------- FOLLOW-UP ----------

QUESTION: Thanks for your prompt response. I would like to ask that If the car was in speed then the crank shaft continues to rotate because of inertia but when i was driving, my speed was may be even less than 10km/h..so it would have like done very less damage. But I cannot understand when it was completely off, after that I tried to start it in gear and gave a jerk...Why that movement took place? If the belt was already gone and there was no movement in camshaft or crankshaft then how come the car moved even in reverse gear for parking. Although i just moved the car 2-3meters but it did move...

Answer
GOOD MORNING WASEEM,IF THE CAR HAS A MANUAL TRANSMISSION THE FLYWHEEL WILL KEEP THE ENG ROTATING LONGER THEN IF IT HAS A AUTO TRANS. YOU ARE CORRECT ON WHAT YOU SAID..THE REASON WHY YOU GOT THIS CAR TO MOVE JUST LITTLE IS BECAUSE NOT ALL OF THE TEETH WENT BAD ON THE TIMING BELT SO THE ENGINE IS WAY OUT OF TIMING BUT JUST ENOUGH TO RUN IT FOR A SHORT WHILE..THE TEETH THAT WERE LEFT ON THE BELT WA ENOUGH TO TURN THE CRANK AND CAM JUST ENOUGH TO FIRE THE ENG. BUT NOT VERY LONG...I HOPE THIS HELPS YOU AND LET ME KNOW THE OUTCOME...GOOD LUCK TO YOU,,,TOM..

Chevrolet Repair

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TOM SHEETS

Expertise

PLEASE READ ALL OF THIS BEFORE ASKING ANY QUESTIONS. IF THIS CHEVY SECTION IS MAXED OUT.YOU CAN REACH ME IN THE OLDS/BUICK SECTION. Will answer questions from 6:00am to 10:00pm all days [EST][[[ NO DIESEL OR PAINT QUESTIONS]]] will answer all 1965 to present QUESTIONS ON ALL GM'S on mechanics of these cars. Keep in mind i am not there in person i am going on what you are telling me !! PLEASE IF ASKING A QUESTION GIVE ME AS MUCH INFO AS POSSIBLE. THE MORE THE BETTER. SUCH AS YEAR,MAKE,MODEL,ENGINE SIZE. THIS WILL HELP ME HELP YOU. I will not be able to answer all questions because of some situations that i would really need to be there and see things for myself,such as electrical issues. In many cases i would need wiring diagrams. I can also give you an estimate on what the cost would be at our repair shop as an idea to help you. Keep in mind that my answer is ONLY MY ADVICE,ck with your mechanic as well.. >> THANK YOU, TOM..

Experience

I have been a ASE certified master mechanic for over 30 years and certified IN ALL 8 CATEGORIES,[engine repair,engine performance,auto trans,manual trans,clutches,steering and suspension,brakes,electrical systems,heating and air/cond. I am also a state CERTIFIED inspector for over 30 years. I do computer work [pcm]fault codes,pcm flashing,state inspection monitor readiness,repairs on exhaust,fuel service,[injection and carburetor,] charging system problems, running issues,alignments,frame problems,tire balance,struts and of course standard and anti-lock brakes.

Organizations
nys state auto repair industry and ase group.

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N/A

Education/Credentials
high school,4 years of tech school,and many many hours of auto training with many gm classes and aftermarket training classes..

Awards and Honors
ASE MASTER TECH CERTIFIED IN ALL 8 CATEGORIES.NYS INSP LICENSE AND A/C CERTIFIED

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MANY CUSTOMERS IN OUR BUSY SHOP.

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