Is this a knock? VID
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Laughing Gas
Joined: Sep 2010
Posts: 1,027
Likes: 2
From: USA
Is this a knock? VID
I bought this truck last week. It drives really good. Have driven about 300miles on it so far. Sometimes it's hard for me to tell if it's a knock or just the older diesel sound. Please see for yourself.
https://youtu.be/8ek4Y0Jb68A
https://youtu.be/8ek4Y0Jb68A
Postmaster
Joined: Dec 2011
Posts: 3,860
Likes: 7
Might be an exhaust valve issue.
It might also be a major exhaust leak next to one of the manifolds - see this:
It ended up being my crossover pipe having cracked right next to the driver's side manifold, with a /big/ crack.
It might also be a major exhaust leak next to one of the manifolds - see this:
Postmaster
Joined: Dec 2011
Posts: 3,860
Likes: 7
Check your exhaust.
One thing I might try is having someone rev the engine for you while you listen and watch for where the noise is coming from.
If it doesn't get loud enough just revving in neutral, jack the rear end up so the wheels are in the air. Put it in drive/high gear and do the same revving thing; the tires spinning up will create a decent load on the engine so you can hear what's going on.
One thing I might try is having someone rev the engine for you while you listen and watch for where the noise is coming from.
If it doesn't get loud enough just revving in neutral, jack the rear end up so the wheels are in the air. Put it in drive/high gear and do the same revving thing; the tires spinning up will create a decent load on the engine so you can hear what's going on.
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
Sounds like a rod knock to me. If it does it at idle you can crack injector lines loose to kill each cylinder and see if the noise changes. Could be an injector knock also, same test is where I'd start for that too
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