Flywheel will not turn during Starting!

19JIMMY95

MEMBER
1995 GMC JIMMY
132,471 MILES

Starter engages flywheel, but flywheel does not turn. Just replaced The starter. Flywheel is very hard to turn by hand. Any ideas what could be causing this issue? Thanks for your help.

Monday, August 29th, 2011 AT 7:48 PM

5 Replies

JDL

MECHANIC
16,098 POSTS

Pull the spark plugs and accessory belt/s, see if cranks any better? Maybe something trying to sieze?

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Monday, August 29th, 2011 AT 7:52 PM

19JIMMY95

MEMBER
3 POSTS

Changed spark plugs about a week ago and drove it for a week before it broke down. Starter gear was cracked so I replaced the starter. I will try the serpantine belt but any other ideas.

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Monday, August 29th, 2011 AT 8:42 PM

JDL

MECHANIC
16,098 POSTS

Try to crank without the spark plugs. You don't need the spark plugs to crank. Maybe hydrostatic lock/fluid in the cylinders? My last thought is something mechanical causing the engine to sieze.

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Tuesday, August 30th, 2011 AT 3:36 PM

19JIMMY95

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3 POSTS

One of the cylinders was full of gas. Both valves ov that cylinder open and close when cranked by hand. What could cause gas to be in oil pan?

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Friday, September 9th, 2011 AT 6:55 PM

JDL

MECHANIC
16,098 POSTS

Could be an injector problem. Also, Check the fuel pressure regulator, vacuum hose. If there is gas in the hose, the regulator is faulty. You need to fix the gas issue, first.

You may have to change oil and filter more than once, to get all the gas out.