seized engine?
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New User
Joined: Jan 2016
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From: Tallahassee
seized engine?
Truck in question is 2002 F150 4.6 with 150K miles. Crew was on interstate tonight driving 65 MPH and truck shut off. They called me out to trouble shoot. Engine had oil (was a quart low) and will not start. Starter engages but will not turn motor over. Had truck towed back to my shop. I removed belt just to see if it may be a locked up pulley i know, long shot)... it was not.
Employed called a shade tree mechanic he knows and trusts. He said was likely a broken timing chain and that is a common problem in 4.6. Said locked engine is probably because broken chain is wrapped around shaft. When I turn key fan does move about 1/4 inch.
1) Does this sound like a possibility or even a plausible explanation ? Just trying to verify the information this guy gave me before I hire him to explore and replace.
2) If this is the case, would a repair be advisable, or is engine likely shot and i should just replace it?
Thanks in advance for your help!
Employed called a shade tree mechanic he knows and trusts. He said was likely a broken timing chain and that is a common problem in 4.6. Said locked engine is probably because broken chain is wrapped around shaft. When I turn key fan does move about 1/4 inch.
1) Does this sound like a possibility or even a plausible explanation ? Just trying to verify the information this guy gave me before I hire him to explore and replace.
2) If this is the case, would a repair be advisable, or is engine likely shot and i should just replace it?
Thanks in advance for your help!
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New User
Joined: Jan 2016
Posts: 3
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From: Tallahassee
Sorry to sound like such a moron, but by crank bolt, do you mean the pulley on the crankshaft at bottom of engine? If it moves what does that mean?
Tuned
Joined: Apr 2013
Posts: 354
Likes: 5
From: Katy, Republic of Texas
Yes, the crank bolt is the bolt on the crankshaft.
If it turns, then the engine is not locked up, but does have some issue since the starter will not turn it over.
If it does not turn, probably time for another motor.
If it turns, then the engine is not locked up, but does have some issue since the starter will not turn it over.
If it does not turn, probably time for another motor.
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