7.3 loud knocking - Ford Powerstroke Diesel Forum
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Old 05-01-2013, 02:54 PM
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7.3 loud knocking

Hey I'm new to this forum and trying to get used to it so bear with me please!😁 I've got a 99 7.3 powerstroke with 246k miles and it recently started leaking anti freeze and it has a loud knock when idling. I've brought it to ford and they said head gasket for the leaking anti freeze and a bent rod in the bottom end for the knock without putting it on the computer..... They also said with the bent rod I might as well be better off with a new motor! I'm trying to get other people's opinion before I sink tons of money in my play toy! Thanks
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Old 05-01-2013, 03:09 PM
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Hello.

Neither of those diagnostics would be found with the computer. What were you doing when the noise started? How much boost were you pushing?

A blown head gasket could cause the antifreeze leak. It would take quite a bit to bend a connecting rod. I would more guess a push rod.

Good luck,
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Old 05-01-2013, 03:31 PM
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I'm not sure what I was doing when the knock started it just kind of started and ive heard people say sometimes when an injector is out it makes a knocking noise
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Old 05-03-2013, 08:02 PM
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I've heard some people saying that injectors can knock, too. But I've never heard one knock.

I don't know how you treat your truck, but an antifreeze leak and a bottom end knock does not sound like something small. Head gaskets don't normally blow on a 7.3, but can if you hammer on it long enough.

Please fill out your signature block with your truck info to give people an idea of what you drive.

Oh, and
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7.3, f250 motor problems, powerstroke

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