Knockingk sound

[RangerWeaver]

Dropped the oil pan today to check the connecting rod bearings.
I found this in the oil pan.

Anyone have a clue on what it could be?

Also I found no play in the connecting rod/crank shaft bearings.

 

[MrBonez]

Dropped the oil pan today to check the connecting rod bearings.
I found this in the oil pan.
View attachment 582582View attachment 582583View attachment 582584View attachment 582585
Anyone have a clue on what it could be?

Also I found no play in the connecting rod/crank shaft bearings.

There is a possibility you have a piston rocking in the bore due to wear in a cylinder bore.
It will make a knocking noise under acceleration and not make much, if any knocking noise while decelerating.

If the engine has alot of miles on it, that could be what you've got going on internally and I know that from one I had with that exact problem/symptom and cause.

It messed with the minds of some that heard it because it sounds and acts just like a rod knock but a rod knocks when decelerating, not while accelerating the engine in RPM's so it was acting backwards from what a knocking rod would do, otherwise the noise sounded the same.

I quit driving the pickup (Old S10 I had years ago) and sold it to a co-worker that also noticed the weirdness of it, and he tore it down out of curiosity after replacing the engine with a good one.

While you have it apart check to see if you don't have a bore with excessive wear, indicating this as a real possibility of what's going on.
That's what it turned out to be and it does make sense when you think about it.

 

[RangerWeaver]

There is a possibility you have a piston rocking in the bore due to wear in a cylinder bore.
It will make a knocking noise under acceleration and not make much, if any knocking noise while decelerating.

If the engine has alot of miles on it, that could be what you've got going on internally and I know that from one I had with that exact problem/symptom and cause.

It messed with the minds of some that heard it because it sounds and acts just like a rod knock but a rod knocks when decelerating, not while accelerating the engine in RPM's so it was acting backwards from what a knocking rod would do, otherwise the noise sounded the same.

I quit driving the pickup (Old S10 I had years ago) and sold it to a co-worker that also noticed the weirdness of it, and he tore it down out of curiosity after replacing the engine with a good one.

While you have it apart check to see if you don't have a bore with excessive wear, indicating this as a real possibility of what's going on.
That's what it turned out to be and it does make sense when you think about it.

I just rechecked the cylinder bores, the cross thatching is still there in each of them. I am wondering if it could still be the exhaust manifolds since I wasn't able to find a machine shop at the time to get them flattened out.

 

[RangerWeaver]

I still have no idea where the piece of plastic I found sitting in the oil pan came from.

 

[jws123]

I still have no idea where the piece of plastic I found sitting in the oil pan came from.

looks like the partial end of a old cam or crank sensor to me.

 

[RangerWeaver]

I also found this in the oil pan.

 

[RangerWeaver]

looks like the partial end of a old cam or crank sensor to me.

That would make sense as the Crank position sensor was replaced late last year at a local shop.

 

[jws123]

Yep its a old crankshaft position sensor its very common for them to snap off into the block your noise still sounds top end to me.

 

[RangerWeaver]

I'm thinking next I will pull the heads

 

[RangerWeaver]

Yep its a old crankshaft position sensor its very common for them to snap off into the block your noise still sounds top end to me.

Do you think it could still be the exhaust manifolds since they were not machined and where both slightly warped.

 

[MrBonez]

I just rechecked the cylinder bores, the cross thatching is still there in each of them. I am wondering if it could still be the exhaust manifolds since I wasn't able to find a machine shop at the time to get them flattened out.

I'm happy to hear it wasn't a cylinder bore wear issue, that would have been expensive to fix.

I seriously doubt exhaust manifolds not being flat can induce a knocking sound - Still possible but not very likely.
Only way possible for that is for them to be barely making contact with the head on one end, making it lightly (As in very lightly) "tap" the head/block via engine vibration while running and it's showing up as a knocking noise.

That's all I can come with at this time.

 

[RangerWeaver]

Threw in the towel and took the Ram to an engine shop. I may be looking at a repair bill anywhere from 2k to 7k. It could be anything from the oil pump failing, the oil bickup having been blocked, or needing a full rebuild.

 

[jws123]

Threw in the towel and took the Ram to an engine shop. I may be looking at a repair bill anywhere from 2k to 7k. It could be anything from the oil pump failing, the oil bickup having been blocked, or needing a full rebuild.

go to the junk yard swap the engine your going to waste more money trying to fix it as it looks like the usual suspects did not fix your issue.