Cub smoke and knock

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jsfarmall
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Cub smoke and knock

Postby jsfarmall » Wed Mar 28, 2018 8:50 am

Cub I just got going this winter with a donor engine smokes, all the time. It does knock when the engine get warmed up real good after a little time being worked. I have another tractor gonna be doing the primary garden work and another dedicated to mowing duty. Mostly what this one will do is pull my field cultivator, maybe some row cultivating, it might dig taters a little just depends on which tractor is handy. I run rotella 15 40, carries decent oil pressure. If I add some lucas additive (9 or 10 ounces I think is the amount to reach recommended 20% mixture) and take it easy would it be able to make it till the winter before I put rings and bearings in? Last thing I want is to cause a catastrophic failure and need another engine swap......again.

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Re: Cub smoke and knock

Postby Shane Nelson » Wed Mar 28, 2018 8:54 am

If it's knocking adding something to the oil will not fix it. It's like playing the lottery if it's knocking but you hope you don't win.
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Re: Cub smoke and knock

Postby jsfarmall » Wed Mar 28, 2018 12:06 pm

Was just hoping it might give a bit more lubrication for working easy cause it only knocks a little when it's worked somewhat hard and high rpm.

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Re: Cub smoke and knock

Postby ricky racer » Wed Mar 28, 2018 2:40 pm

Lubrication doesn't fix knocks, proper clearances fixes knocks.
Knocks are your engines way of telling you that its trying to hammer itself apart. How lucky do you feel?
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Re: Cub smoke and knock

Postby areger23 » Wed Mar 28, 2018 4:08 pm

i would not run it, if you run it you run the risk of ruining the crank or throwing a rod through the block

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Re: Cub smoke and knock

Postby Dale Finch » Wed Mar 28, 2018 7:15 pm

areger23 wrote:i would not run it, if you run it you run the risk of ruining the crank or throwing a rod through the block

Like THIS??!! :big what:
20170311_181403 (Small).jpg

20170312_165341 (Small).jpg

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Re: Cub smoke and knock

Postby Indy4570 » Wed Mar 28, 2018 7:30 pm

Dale Finch wrote:
areger23 wrote:i would not run it, if you run it you run the risk of ruining the crank or throwing a rod through the block

Like THIS??!! :big what:
20170311_181403 (Small).jpg
20170312_165341 (Small).jpg



ouch.... :shock:
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Re: Cub smoke and knock

Postby jsfarmall » Wed Mar 28, 2018 8:42 pm

:surrender: New bearings just got cheaper all of a sudden !!!!! :surrender:

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Re: Cub smoke and knock

Postby staninlowerAL » Wed Mar 28, 2018 8:46 pm

Bad day on the farm, eh Dale? Lots worse than a "bad hair day"!!! :evil: :big crying: Might make a decent boat anchor.

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Re: Cub smoke and knock

Postby ntrenn » Wed Mar 28, 2018 8:47 pm

Two kinds of knock...rod knock and wrist pin knock. Rod knock ends up like that horrible picture above. Wrist pin knock can go on indefinitely. The 65 has excessive wrist pin clearance and has knocked for the last 5 years. My 86 s10 with iron duke has knocked for 200,000 miles...but its a wrist pin knock...probably all 4...

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Re: Cub smoke and knock

Postby Rcook09 » Wed Mar 28, 2018 8:58 pm

Dale Finch wrote:
areger23 wrote:i would not run it, if you run it you run the risk of ruining the crank or throwing a rod through the block

Like THIS??!! :big what:
20170311_181403 (Small).jpg

20170312_165341 (Small).jpg



Hope I never have to feel this pain
:tractor:

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Re: Cub smoke and knock

Postby Dale Finch » Wed Mar 28, 2018 9:06 pm

That was last year's fun...got a "new" engine from a forum member, swapped it out, and all was well again. A bit of time and $$! Oh well.
So you can guess my recommendation!! :?

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Re: Cub smoke and knock

Postby Waif » Wed Mar 28, 2018 10:18 pm

ntrenn wrote:Two kinds of knock...rod knock and wrist pin knock. Rod knock ends up like that horrible picture above. Wrist pin knock can go on indefinitely. The 65 has excessive wrist pin clearance and has knocked for the last 5 years. My 86 s10 with iron duke has knocked for 200,000 miles...but its a wrist pin knock...probably all 4...

An S-10 I had near that year had a Pontiac 4 cylinder.
A flat metal plate of sorts was the cam keeper at one end with some clearance that hinted of a diesel engine sound at times. Many miles on that puppy before I sold it ,running great.

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Re: Cub smoke and knock

Postby Waif » Wed Mar 28, 2018 10:19 pm

Dale Finch wrote:
areger23 wrote:i would not run it, if you run it you run the risk of ruining the crank or throwing a rod through the block

Like THIS??!! :big what:
20170311_181403 (Small).jpg
20170312_165341 (Small).jpg

Arrrgh!

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Re: Cub smoke and knock

Postby jsfarmall » Thu Mar 29, 2018 8:16 am

ntrenn wrote:Two kinds of knock...rod knock and wrist pin knock. Rod knock ends up like that horrible picture above. Wrist pin knock can go on indefinitely. The 65 has excessive wrist pin clearance and has knocked for the last 5 years. My 86 s10 with iron duke has knocked for 200,000 miles...but its a wrist pin knock...probably all 4...


How do ya tell the difference? And the engine only starts knocking after it's been worked. If it's been idling cooling down a couple minutes and throttle up its not knocking then. Unless I go back to pulling hard again.


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