New CK2610 : rough running/clanging engine, cold and hot

mangler · May 25, 2020

OK, admittedly I have not had a diesel in a while (last time was a 1987 diesel VW Jetta), but I swear this engine sounds like it wants to throw a rod when cold. It gets better when hot, but still rough sounding, with a lot of mechanical hammering noises. To be clear it is not missing or anything, just really noisy. Really hoping this is something loose on the tractor I am hearing, because it does not sound good.

Mind you, this is with 11hours on the clock, and a cold start is high 60s, so there are really no disclaimers here. Checked the oil, looks 3/4 full. Probably the world's cheapest oil though.

What viscosity are you running in your Kiotis? Manual says 10W30, 10W40 and 15W40 diesel rated all acceptable. Wondering if a synthetic 15W40 would quiet it down on "cold" starts. Does not get too cold here,garage kept and I have a bloc heater installed, so not really worried about winter starts. Sounds crazy but I can't wait for the first oil change. Probably going to push out the el cheapo grease pretty soon also.

Industrial Toys · May 25, 2020

Will changing the RPM not get rid of the noise? Usually if something is vibrating externally , you can simply change the resonating frequency a bit.

mangler · May 25, 2020

Industrial Toys said:
Will changing the RPM not get rid of the noise? Usually if something is vibrating externally , you can simply change the resonating frequency a bit.

I does, somewhat, some rpms are a bit smoother than others. None of them buttery smooth though.

toukow · May 26, 2020

Have you listened to other diesel tractors in this size range? They definitely don't sound like automotive diesels IMO. I've only previously owned a Ford 1700 with Shibura two cylinder, and that thing sounded like it was always ready to toss a rod, but that was its nature. I can post a video of mine with 40 hours starting up cold if it would be of help, not sure how accurate the sound reproduction would be though on a Iphone. Any way to stop by the dealer to hear another one, or even a different make? Just a thought.

I'm running 15W40 Rotella, as you said it's listed as acceptable, and it was on sale so I stocked up. Mine came with 10W30 per the dealer, and I think that is probably the better choice for the weather/temps in the Seattle area.

Toukow

justman777 · May 26, 2020

A video of it running would help. I always thought tractors ran really rough, especially in lower RPMs.

levi333 · May 26, 2020

The description of your 2610 sounds like mine. I'm at 16hrs and its still "clanky" at low rpm for the first few minutes. Seems to warm up and smooth out after awhile.

MAD777 · May 26, 2020

Mine clanks pretty loud at low rpm's but it seems to be the nature of the beast. I've had mine out in zero degree weather and it still runs like a champ, albeit loudly.

tiogajoe · May 27, 2020

Yup. My 2610 is clanky. Have about 300 hrs on it and it is better than when it was new. I like to run it right at 2000 rpm's. That's where is seems to purr.

MichiganIron · May 27, 2020

tiogajoe said:
Yup. My 2610 is clanky. Have about 300 hrs on it and it is better than when it was new. I like to run it right at 2000 rpm's. That's where is seems to purr.

The "clanky" noise is due to the indirect injection of the diesel. The CK2610 utilizes the mechanical indirect injection system like the other Tier III Diesels. What sounds like "clanking" is actually caused by the combustion that takes place in the pre-combustion chamber in the engine head. Gives it that old "Diesel" sound as the fuel combusts in the pre-combustion chamber. They do quiet down some when they warm up, but still "ping".

toukow · May 27, 2020

Great to have the explanation from Michigan Iron as to source of the sounds, I did not have a clue. I already had made a sound recording yesterday, so here it is for reference anyway. I filmed the exhaust as others had mentioned excessive smoke on start up of their new tractors. For what it's worth, Toukow

Sound Recording Cold Start Kioti CK2610HST - YouTube

MichiganIron · May 27, 2020

The whitish smoke is diesel that is not completely combusted. Even with the pre-cups, there is still some diesel that does not completely burn before the engine head is "hot" enough. This usually lasts 20 to 30 seconds, then clears as the head warms from combustion. We normally recommend that you do (2) pre-heat cycles just to let the head get a little warmer.

You don't experience this as much with the Tier IV Engines since they are direct injection and inject at 21,000 psi, 3 degrees before TDC. The Tier iV's are a bit quieter since you do not have the pre-combustion chamber in direct injected diesels.

Hope this helps,

justman777 · May 27, 2020

Sounds completely normal to me. Good explanation MIE!

Kioti Dave · May 27, 2020

Yup, sounds normal.

tiogajoe · May 28, 2020

MichiganIron said:
The "clanky" noise is due to the indirect injection of the diesel. The CK2610 utilizes the mechanical indirect injection system like the other Tier III Diesels. What sounds like "clanking" is actually caused by the combustion that takes place in the pre-combustion chamber in the engine head. Gives it that old "Diesel" sound as the fuel combusts in the pre-combustion chamber. They do quiet down some when they warm up, but still "ping".

What does Kubota do that makes their engines so quiet?

justman777 · May 28, 2020

tiogajoe said:
What does Kubota do that makes their engines so quiet?

They make their engines differently. :laughing:

Seriously, my JD2305 sounded just like the CK2610. I suspect if you put them side by side, you wouldn't be able to tell a difference in how it sounded. The JD2305 had a small Yanmar engine which are known for their reliability. I don't have any reason to doubt the Daedong engine is any more or less reliable. How it sounded wasn't really a concern of mine, so long as it ran reliably.

mangler · May 31, 2020

Makes me feel a bit better, mine does sound like that. Her's mine starting "cold". I still think she's extra clangy.

[video]https://drive.google.com/file/d/11MJQsw8iT-9CrHV2Bxb76SCdhh12AGoI/view?usp=sharing[/video]

JoelD · May 31, 2020

My 2004 lk3054 sounds almost identical.

mangler · May 31, 2020

JoelD said:
My 2004 lk3054 sounds almost identical.

Since its likely been sounding like that for 16 years, looks like it does no affect durability

Robin Veerman · May 31, 2020

mangler said:
OK, admittedly I have not had a diesel in a while (last time was a 1987 diesel VW Jetta), but I swear this engine sounds like it wants to throw a rod when cold. It gets better when hot, but still rough sounding, with a lot of mechanical hammering noises. To be clear it is not missing or anything, just really noisy. Really hoping this is something loose on the tractor I am hearing, because it does not sound good.

Mind you, this is with 11hours on the clock, and a cold start is high 60s, so there are really no disclaimers here. Checked the oil, looks 3/4 full. Probably the world's cheapest oil though.

What viscosity are you running in your Kiotis? Manual says 10W30, 10W40 and 15W40 diesel rated all acceptable. Wondering if a synthetic 15W40 would quiet it down on "cold" starts. Does not get too cold here,garage kept and I have a bloc heater installed, so not really worried about winter starts. Sounds crazy but I can't wait for the first oil change. Probably going to push out the el cheapo grease pretty soon also.

Mangler,
Nice to see a fellow Canadian on here. I have a CK30HST and I've used Amsoil's Diesel Clean/Cetane in it, and other tractors before it, with great results. The first time that I mixed it in the fuel I could hear the difference as I filled the fuel tank while the tractor was idling. Diesel fuel burns best with a cetane level of around 52 and our diesel fuel in Canada is lucky to be 45 cetane. Also be sure that you use Name brand diesel fuel and get it from a station that you see a lot of big rigs fueling up. That way you know the fuel is fresh. I don't bother with the off-road fuel pump for the few cents saved and who knows how fresh/not fresh the fuel is. Here is the link to Amsoil diesel additive. Diesel Injector Clean + Cetane Boost ADS - AMSOIL

I also use AMSOIL series 3000 5W30 diesel oil in the engine for good oil flow and easy starts in the cold, with good year round protection. Any of the Signature Series (might be overkill?) or Heavy Duty oils would work well for you. Diesel Motor Oil - AMSOIL

Currently they offer free shipping due to covid-19, if your order is over $100, so a good time to get the best. It comes right to your door, easy peasy, works for me. You could inquire about oil filters for your tractor but it's a good idea to use OEM while still under warranty. I hope you enjoy your new tractor as much as I do mine. Dutchy

The Fred · Jun 1, 2020

Make sure the induction pre-heater is working (at the intake manifold entry). Makes a huge difference at cooler temps. Throw an amp clamp around the wire they draw 30 plus amps when they are working correctly.

I disconnect mine in Summer by removing the fuse. You'll know it's right if the tractor idles a bit higher after 20 seconds or so, the lower idle when first started is because the alternator is trying to power the induction heater and putting a load on the engine.