[AT] Kubota M5700 noise
Cecil Bearden
crbearden at copper.net
Mon Apr 6 11:17:21 PDT 2020
I have a 2003 F-150 4wd that had a broke cross member and a clicking
that sounded like the air conditioner clutch. At this time I was having
work done as my back was killing me. Mechanic replaced A/C clutch and
it still clicked. He said drive it till it quits. Last time I ever
used him.... Took it to Transmission shop and $600 later it had a new
flex plate. Had to weld up cross member under transmission tail. 6
months later had to rebuild transmission. $2300 and I pulled a trailer
about 150 miles and when I got back the flex plate clicking again. It
was during Christmas of 2018. Trans guy was on vacation. It still
sits here as I had t o use it to feed cattle with and have not had time
to make appt. o get flex plate replaced. F-150 torque converters expand
if they get hot and break the flex plate.
Cecil
On 4/6/2020 1:05 PM, Ken Knierim wrote:
> Really reaching a bit here... I had a persistent rattling noise I
> chased in my Blazer. It made enough racket that the spark retard
> system would kick the timing back. Tried all kinds of things; kept
> thinking it was a rod or something. I finally got an engine to upgrade
> from the 305 to a 383 (stroker 350). When I tore it apart, I found the
> bolts on the torque converter to the flex plate had slipped and were
> rattling. Had to replace the flexplate to fix it but the noise sounded
> in the engine and wasn't.
>
> Yours sounds like a particular cylinder from the video but is it
> possible there's something loose in the bell housing?
>
> Ken in AZ
>
> On Mon, Apr 6, 2020 at 10:40 AM Dave Maynard
> <dave at themaplehillfarm.com <mailto:dave at themaplehillfarm.com>> wrote:
>
> Actually, did not check length of connecting rod and its clearance
> from head at TDC. But it's not traveling to close to the head as
> there would be damage showing. Just have this new concern about
> the wrong rod being put in by mistake, but that would have been
> short, not long.
>
> Dave
>
> On Mon, Apr 6, 2020, 1:01 PM Mike M <meulenms at gmx.com
> <mailto:meulenms at gmx.com>> wrote:
>
> When you had it apart, did you check all the piston,ring and
> bearing clearances?
>
> Mike M
>
>
> On 4/6/2020 11:35 AM, Dave Maynard wrote:
>> No sleeves in this engine. Someone had this engine apart
>> before and #5 had a new piston and rod and bearings. The
>> seller said it was his father's tractor since new and never
>> been apart....he lied! There was more RTV on oil pan than you
>> could imagine and obviously that piston and rod and bearings
>> had been replaced and I thought they had been chasing the
>> noise. Unless there was some other reason, but dont know.
>> My friend and mechanic help has a Jacobson mower he's is
>> rebuilding that has a 4 cylinder version of this motor that
>> appears identical except the number of cyl's. He found the
>> rod to be the same except it a tweak shorter by an almost
>> immeasurable amount, maybe .005 or .010. Part number is
>> almost the same except last digit and now I'm wondering if
>> that could be someone's mistake. Would shorter rod cause
>> preignition? By the way, there is no part number on the rods
>> so they would have to be accurately measured.
>> It's going to be a bit before I can get this back apart
>> again, but hoping to have this fixed in time to plow.
>>
>> Dave
>>
>> On Mon, Apr 6, 2020, 9:08 AM Cecil Bearden
>> <crbearden at copper.net <mailto:crbearden at copper.net>> wrote:
>>
>> That was one of my thoughts, but my experience has been
>> that the liner movement was a double "thud" once on down
>> stroke and once on upstroke.
>> Cecil
>>
>> On 4/6/2020 1:12 AM, k7jdj at aol.com <mailto:k7jdj at aol.com>
>> wrote:
>>> Cylinder liner loose. Don't know if this engine even has
>>> cylinder liners if it does and that liner is moving you
>>> would get click. Did you look carefully at the head when
>>> you had it off and look for any sign of head distress?
>>> I would do a compression check as well.
>>>
>>> Gary
>>>
>>> Renton, WA.
>>>
>>>
>>> -----Original Message-----
>>> From: Roger Moffat <rogerkiwi at gmail.com>
>>> <mailto:rogerkiwi at gmail.com>
>>> To: Antique Tractor Email Discussion Group
>>> <at at lists.antique-tractor.com>
>>> <mailto:at at lists.antique-tractor.com>
>>> Sent: Sun, Apr 5, 2020 7:43 pm
>>> Subject: Re: [AT] Kubota M5700 noise
>>>
>>>
>>>
>>>> On Apr 5, 2020, at 9:59 PM, Dave Maynard
>>>> <dave at themaplehillfarm.com
>>>> <mailto:dave at themaplehillfarm.com>> wrote:
>>>>
>>>> Have cracked injector lines one at a time, and it gets
>>>> quieter on #5
>>>
>>> But only on #5?
>>>
>>> When you crack the others the engine misses, but the
>>> noise remains?
>>>
>>> I wonder if something about cylinder 5 is somehow
>>> different so that the compression is higher, and so it’s
>>> igniting (pre-igniting) too much before top dead centre
>>> in just that cylinder?
>>>
>>> Eg #5 piston slightly higher than the other 4?
>>>
>>> Roger
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