Engine Knock
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Senior User
Joined: Jun 2008
Posts: 278
Likes: 0
From: Jupiter, Fl
Engine Knock
I have the 302 with 67k miles on it and it has a knock in the engine when moving down the road but not in idle or if i rev the engine when sitting. ive tried to put some additives in the engine to reduce wear but nothing has happened?
Fleet Owner
Joined: Jan 2008
Posts: 26,898
Likes: 3
From: southern md
so it only knocks when driving?
Cargo Master
Joined: Jul 2009
Posts: 2,541
Likes: 54
From: Des Moines
If you have some jackstands, or even cinder bricks or blocks will work if you have enough of them and a flat, stable surface, raise the drive wheels up off the ground, then start it and put it in gear. If it's only knocking while driving, then this should hopefully replicate the knock. It's not putting the engine under as much load as when you're driving, but it might be enough.
Then, being extremely careful not to interfere with moving engine parts [ie get your hand caught in the belts
], you can use a small chunk of conduit, solid rod, or a long screwdriver to help isolate where the knock is coming from. Just place one end on random areas of the engine [valve covers, intake manifold, heads, etc] and the other against your ear. This is more difficult to do with a piece of conduit as conduit tends to make sounds echo inside it, but you can isolate the source area of the noise which will then help with a diagnosis.
I do want to warn you tho- the more you run the engine with the knock, the more the possibility of serious engine damage grows. If at all possible you should quit driving the vehicle until a diagnosis and repair can be made.
Keep us updated.
Then, being extremely careful not to interfere with moving engine parts [ie get your hand caught in the belts
], you can use a small chunk of conduit, solid rod, or a long screwdriver to help isolate where the knock is coming from. Just place one end on random areas of the engine [valve covers, intake manifold, heads, etc] and the other against your ear. This is more difficult to do with a piece of conduit as conduit tends to make sounds echo inside it, but you can isolate the source area of the noise which will then help with a diagnosis.I do want to warn you tho- the more you run the engine with the knock, the more the possibility of serious engine damage grows. If at all possible you should quit driving the vehicle until a diagnosis and repair can be made.
Keep us updated.
More Turbo
Joined: Sep 2003
Posts: 630
Likes: 4
From: Northeast
If you have some jackstands, or even cinder bricks or blocks will work if you have enough of them and a flat, stable surface, raise the drive wheels up off the ground, then start it and put it in gear. If it's only knocking while driving, then this should hopefully replicate the knock. It's not putting the engine under as much load as when you're driving, but it might be enough.
Then, being extremely careful not to interfere with moving engine parts [ie get your hand caught in the belts ], you can use a small chunk of conduit, solid rod, or a long screwdriver to help isolate where the knock is coming from. Just place one end on random areas of the engine [valve covers, intake manifold, heads, etc] and the other against your ear. This is more difficult to do with a piece of conduit as conduit tends to make sounds echo inside it, but you can isolate the source area of the noise which will then help with a diagnosis.
I do want to warn you tho- the more you run the engine with the knock, the more the possibility of serious engine damage grows. If at all possible you should quit driving the vehicle until a diagnosis and repair can be made.
Keep us updated.
Then, being extremely careful not to interfere with moving engine parts [ie get your hand caught in the belts
], you can use a small chunk of conduit, solid rod, or a long screwdriver to help isolate where the knock is coming from. Just place one end on random areas of the engine [valve covers, intake manifold, heads, etc] and the other against your ear. This is more difficult to do with a piece of conduit as conduit tends to make sounds echo inside it, but you can isolate the source area of the noise which will then help with a diagnosis.I do want to warn you tho- the more you run the engine with the knock, the more the possibility of serious engine damage grows. If at all possible you should quit driving the vehicle until a diagnosis and repair can be made.
Keep us updated.
Use jack stands or solid timbers, but preferably jack stands.
