Skip the auto shop - Our mechanics make house calls

Q: Engine is locked... My car is an automatic 1999 Chevy Lumina with 80,000 miles it’s clicking when turning the key. Didn't over hea

asked by on

My engine is still locked... My car is an automatic 1999 Chevy Lumina with 80/85,000 miles it clicked when turning the key. Didn't over heat, oil change last month, replaced (38 dys ago) leaking intake gaskets & thermostat, also had the radiator replaced. Tried turning the engine over by hand, nothing - removed the spark plugs (old) & serpentine Belt, still nothing. Just need to understand what could have made the engine lock up & what can I do to get it back to normal - because people want me to throw in the towel.

My car has 80000 miles.
My car has an automatic transmission.

The engine could be locked due to mechanical breakage. To rule that in or out, first check to see if the starter motor pinion gear is jammed in the ring gear on the flex plate. If it is not, disconnect the torque converter from the flex plate. If no problem is found and the engine is still locked, if the engine is of the non-interference type, remove the timing chain to isolate the top end from the bottom end. If you have an interference engine, though, obviously don’t try that as such movement will damage the engine. Once you figure out if the problem is in the valve train versus the bottom end, you will have to disassemble the engine to repair it. If you want these diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a no start diagnostic and the responding certified mechanic will identify the problem and give you a full slate of repair options to consider. It is definitely repairable (everything is) but first you need to identify the fault. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Engine is locked... My car is an automatic 1999 Chevy Lumina with 80,000 miles it’s clicking when turning the key. Didn't over hea

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: The wires coming off engine near alternator and belt assembly are burnt

Without a complete inspection of the vehicle to find out why the wires shorted it would be hard to know the exact part to buy. The harness may be just the alternator harness or the engine harness that goes to...

Q: During rain, dashboard lights & radio fade out - 1999 BMW 332is

Probably one or more electrical connections are getting wet when it rains. The wheel speed sensor for example is at wheel level (inside the wheel arch), and catches all sort of road spray. Once you find the problem connectors, spray...

Q: Using a lot of oil now

Your truck is using excessive oil in my opinion. Chevrolet has oil consumption ongoing issues for your 2007 model. I would recommend getting an oil consumption test to document the exact amount of oil you are using per 1000 or...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...