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Discussion Starter · #1 ·
Hi, I'm new to this forum and new to owning a subcompact tractor. I previously owned a 1997 JD425 with a gas engine and recently traded it in for a used 2015 1023E with 165hours. I questioned the engine noise coming from the Yanmar diesel at the time of purchase, but the JD Dealer I purchased from said it was normal on the Yanmars. I'm not familiar with the Yanmar diesel engine but familiar with other diesel engines such as Detroit's and Cummins.

I hear what sounds like valve chatter or ticking/knocking in the engine when starting and running the engine at low RPM, I can't hear it at high RPM due to the overall noise of the machine. Just to be clear, I'm not referring to the fuel pump ticking at startup, I'm familiar with that noise. I did ask another dealer about the noise and they said to monitor the temperature and everything would be ok if it doesn't get high!!

I searched this forum and didn't find anything specific to 1023E Yanmar noise or ticking sounds, maybe I missed it.
Is this normal for the Yanmar diesel engine? Should I be concerned, even though the dealer said it's normal? Has anyone else heard similar noise, if so, was there an issue?
Thank you for the help.
Carmen
 

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You might just be hearing the valve lifters, these engines (I'm quite positive) have solid, adjustable (non-hydraulic) valve lifters that always have a little tapping noise especially at low RPMs. They tap a little because you have to maintain a slight clearance between the lifters and the valves in order for the valves to close completely.
As long as you're not hearing piston slap or a knock from the bottom end you should be OK.
 

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Discussion Starter · #3 ·
You might just be hearing the valve lifters, these engines (I'm quite positive) have solid, adjustable (non-hydraulic) valve lifters that always have a little tapping noise especially at low RPMs. They tap a little because you have to maintain a slight clearance between the lifters and the valves in order for the valves to close completely.
As long as you're not hearing piston slap or a knock from the bottom end you should be OK.
Thank you for the comment. The noise is definitely on the top, not the bottom. This is reassuring!
 

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Check the air filter bracket
 

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What you are probably hearing is a clacking type of noise. This noise is the sound of detonation at low rpm. If your old enough you may remember that many cars would make this sound when shut off as a result of the newly introduced "lead free" gasoline. Nothing to worry about and this noise is typical with most diesel engines. Have faith in the Yanmar. They're some of the best engines know to man.
 

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If your prior Diesel engine experience has been with one under the insulated hood of a truck, with the tractor you are much less isolated from and on top of the diesel sounds.

I recall being really surprised at first at the clatter coming from my tractor. I expected it to be more like the diesel noise from trucks I had been riding in.
 

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Hi, I'm new to this forum and new to owning a subcompact tractor. I previously owned a 1997 JD425 with a gas engine and recently traded it in for a used 2015 1023E with 165hours. I questioned the engine noise coming from the Yanmar diesel at the time of purchase, but the JD Dealer I purchased from said it was normal on the Yanmars. I'm not familiar with the Yanmar diesel engine but familiar with other diesel engines such as Detroit's and Cummins.

I hear what sounds like valve chatter or ticking/knocking in the engine when starting and running the engine at low RPM, I can't hear it at high RPM due to the overall noise of the machine. Just to be clear, I'm not referring to the fuel pump ticking at startup, I'm familiar with that noise. I did ask another dealer about the noise and they said to monitor the temperature and everything would be ok if it doesn't get high!!

I searched this forum and didn't find anything specific to 1023E Yanmar noise or ticking sounds, maybe I missed it.
Is this normal for the Yanmar diesel engine? Should I be concerned, even though the dealer said it's normal? Has anyone else heard similar noise, if so, was there an issue?
Thank you for the help.
Carmen
Your noise sounds like the noise my X748 with 400 hours was making. I bought it used in the middle of winter and i just thought the noise was from it being really cold. Two mechanics adjusted the valves and told me just to ignore it and keep using it.
Tire Wheel Vehicle Hood Tractor
I did for one summer and this winter i couldn't take it any longer . I had it pulled apart and the #1 piston was skuffed. The sleeve was OK and it wasn't using oil and had good power but sounded awful at an idle. If i was you i'd take it back and make them fix it. Kent
 

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Thank you for the comment. The noise is definitely on the top, not the bottom. This is reassuring!
Just make sure to also check that air filter mounting bracket in case it's loose or broken, it's a common issue.
If the clatter you hear is from the top end, I wouldn't worry about it unless it was obscenely loud.
 

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The 1023E doesn't use the air filter canister bracket that's being mentioned as a possible source of the noise. The 1023 never had the infamous bracket mounted to the engine. Only the 1025 (in North America) did. The 1023 air canister has always been mounted to the radiator support.
 
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Mine new was quite mechanically noisy....still is at lower rpm's normal at high.
Just the way they are...
You can hear plenty of these engines on youtube.
 
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I dropped my idle to 1300 rpms.
 
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