might be an engine knock - Ford Powerstroke Diesel Forum
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Old 02-25-2009, 02:08 PM
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might be an engine knock

I'm a new owner of a 2002 f350 7.3 powerstroke. Never owned a diesel before. I know they are louder then regular gas motors, but it allmost sounds like I have a knock. Don't feel loss of power or see smoke. Just not sure if I'm hearing a knock or normal operation. Any suggestions or comments would be highly appreciated.

thanks f350crew/long
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Old 02-27-2009, 05:26 AM
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Quote:
Originally Posted by f350crew/long View Post
I'm a new owner of a 2002 f350 7.3 powerstroke. Never owned a diesel before. I know they are louder then regular gas motors, but it allmost sounds like I have a knock. Don't feel loss of power or see smoke. Just not sure if I'm hearing a knock or normal operation. Any suggestions or comments would be highly appreciated.

thanks f350crew/long
7.3's are known to have injector 'cackle', which can be pretty loud @ times, especially when you have the #8 injector intermittently being starved. Try a contribution test with a scan tool & see if you have any injector codes 1st.
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Old 02-27-2009, 05:30 AM
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They make a very distinct sound at idle that is easily mistaken for a rod knocking. It might be what Raider said or it may be nothing at all!
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Old 02-27-2009, 05:52 AM
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more than likely the sound of a healthy 7.3 STROKER!!!
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Old 03-01-2009, 10:34 AM
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Quote:
Originally Posted by RadarRider View Post
7.3's are known to have injector 'cackle', which can be pretty loud @ times, especially when you have the #8 injector intermittently being starved. Try a contribution test with a scan tool & see if you have any injector codes 1st.
Thanks for the comment. After posting the thread, I took the truck to 6 different mechanics. About half were diesel. They all told me # 1 rod was making the noise. After all said and done, My warranty and used car dealer are either replacing the engine with a short block or finding a used motor. The used dealer could not believe this was the case, and frankly I couldn't either. Sounds like the person that sold this to the dealer, masked the problem.

Before I posted the first thread, I had a mechanic perform a scan and he found nothing.
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Old 03-01-2009, 12:46 PM
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Quote:
Originally Posted by f350crew/long View Post
Thanks for the comment. After posting the thread, I took the truck to 6 different mechanics. About half were diesel. They all told me # 1 rod was making the noise. After all said and done, My warranty and used car dealer are either replacing the engine with a short block or finding a used motor. The used dealer could not believe this was the case, and frankly I couldn't either. Sounds like the person that sold this to the dealer, masked the problem.

Before I posted the first thread, I had a mechanic perform a scan and he found nothing.
He might've performed the scan, but did he try a buzz test?
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Old 03-02-2009, 10:29 AM
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Quote:
Originally Posted by RadarRider View Post
He might've performed the scan, but did he try a buzz test?
Don't think so.
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