Engine Knock???

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Apr 29, 2012 | 04:39 PM

#46

alwaysfords41

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Quote:

Originally Posted by gardengirls

I had heard that hydrogen peroxide and vinegar mixed eats steel. Does anyone know if it eats aluminum? Thought maybe I could spray some on and let it eat the bolt smaller so it wouldnt bust off. But I don't want to damage the head.

If it eats steel it is probably going to eat a lot more of the head of the bolt than the threads. I'd stay with the Seafoam.

Apr 30, 2012 | 10:08 AM

#47

gardengirls

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Joined: Apr 2012

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Quote:

Originally Posted by qepv25a

Gardengirl..Was it cracked? Did you fix it? If you did, did it solve the knock? I have the same knock, and no one can figure it out? Thanks Bob

I haven't got to fixing it yet. I did take it to an exhaust shop that checked it for free. They said it has a crack. We also had a cold morning here so I could check it at idle before it warmed up enough to expand and kind of seal. I put my head in the wheel well of both sides and sure enough I smelled exhaust on the passenger side. Confirms it enough for me to tackle the job.

I have 4 daughters.
Since its not a real critical repair, I'm not gonna stay up all night while theyre in bed to fix it. I will wait until my husband or mom has time off to watch them for me. I'll let you know as soon as I'm done though.
I'm gonna order the parts this week and start cleaning away the rust and soaking it with sea foam and pb. Maybe Kroil oil if I can find it.

Oct 31, 2016 | 09:08 PM

#48

kevschmi

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Joined: Oct 2016

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Gustavo33 - What did this end up being? Your youtube post indicates it was the hydraulic lifters. Was it that or the timing chains and guides? I have the exact same sound coming from my 2004 5.4. Sounds like the rod bearing.