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Farmall & IHC Tractors Discussion Forum
Show Parts for Model:

Desperate for help! Loud knock in IH b275

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Palerider0331

07-12-2018 13:17:19




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Hi everyone, I'm new here and don't know anything about tractors. I have a Diesel IH b275 that my wife and I use to do work around our small farm and all of a sudden there is a very loud knock in the engine when it's warm. It wasn't there when I restarted it a day later but when after I tilled up a few hundred feet it returned. It's extremely loud and seems to be kind of changing rythm and direction if that makes any sense. I'm desperate for any and all help. I need this old tractor but know nothing about these types of motors.

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farmer656

07-14-2018 09:42:41




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
remove oil filter, cut it open, if you see a lot of metal, problem solved, not good



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Palerider0331

07-13-2018 19:41:35




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
[quote="CVPost-FastFarmall"](quoted from post at 18:47:23 07/13/18) Just like a 3406 C model cat, there is something in the pump that malfunction's and it sound's like a rod coming out the side any minute, help me with the details Caterpillar guy or somebody !![/quote

] I really appreciate any and all help. I know a bit about gas motors, motorcycles, trucks, etc.. But I'm completely clueless when it comes to this old Diesel Tractor. I tried to start it just to move it and now I cant even really get it to roll over. That might be just a battery issue though. I live in Central Michigan, by Ithaca to be exact. So if anyone on here knows someone I can call locally I'd really appreciate it. Ughhhhhh. I just had the motor blow up in my truck last week and I'm losing my mind a bit. I take good care of my stuff and in the last month all of my vehicles and my tractor have went to crap. I'm praying that I can figure this deal out with the tractor. If I could afford a better one I'd have one but life has thrown me a whole games worth of curve balls in the last few years. I'm not one to complain but geeze I really need for somthing to go right and work out.

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BarnyardEngineering

07-13-2018 04:35:41




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
You've really got two choices at this point:

1. Find a local mechanic who can work on the tractor for you.

2. Find another tractor.

If there is something serious wrong with the engine, fixing it will cost more than the tractor is worth, and unless you are madly in love with the tractor and can go without the tractor for weeks/months while it is being overhauled to the tune of several thousand dollars, it may be better to park it and find something different.

This is the disadvantage to running old tractors. Things can go very wrong very quickly at any given moment for no apparent reason at all. They are old and have seen a lot of use. Everything is worn. You can't predict what will fail or when.

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Bob

07-12-2018 20:14:29




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
"but do 60s English Diesel tractors have injectors"

ALL diesel engines have injectors of some sort.

Have you checked the oil? It's possible a seal leak has dumped diesel fuel into the crankcase, thinning the oil, and causing a rod bearing failure. (If that has happened, it will be way overfull on the dipstick and smell of diesel.)

While it's POSSIBLE you have a simple injector issue, that's probably not as likely to be causing a really SHARP knock vs. something more catastrophic. (More like a dull "thud".)

At this point I wouldn't run it anymore 'til you have a capable "wrench" with diesel experience check it out.

ONE thing you could do is to drain the oil into a non-metallic drain pan and swipe a magnetic pickup tool around in the drained oil and see if it picks up any debris.

If more than a simple injector problem, it's gonna cost as much as the tractor is worth to fix it, if you continue to run it 'til the engine "ventilates" the tractor will be reduced to scrap value.

All that being said, I own it's younger cousin, an IH "424".

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rustred

07-12-2018 20:48:27




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 Re: Desperate for help! Loud knock in IH b275 in reply to Bob, 07-12-2018 20:14:29  
i have heard bad injectors knocking louder than a bad connecting rod brg. a rod brg. knocks steady and does not stop and start knocking, till the rod breaks and flies out the side of the block.i also have heard injectors knock and then get quiet. if the injector is shooting the diesel into the cyl. without a spray pattern that is the knock you will hear. can be as simple as the injector tip not closing properly, caused by a spec.of dirt or whatever getting past the filters. the 350 oldsmobile diesel engine in the 1980's was famous for injector trouble and knocking. plus everything else that did not stand up in that wanna be diesel engine.

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Palerider0331

07-12-2018 17:14:32




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
Quoting Removed, click Modern View to see I'm not trying to sound like a dummy here, but do 60s English Diesel tractors have injectors. I seriously don't know anything about these engines.



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rustred

07-12-2018 17:00:37




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 Re: Desperate for help! Loud knock in IH b275 in reply to Palerider0331, 07-12-2018 13:17:19  
you might have a bad injector. when it starts knocking loosen each injector line till you find the one that is the culprit. the knock will go away once line is loose. im just throwing this out there , cause if it was a rod knock it would be steady. and injector will sound just like a rod knock.



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FastFarmall

07-13-2018 18:47:23




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 Re: Desperate for help! Loud knock in IH b275 in reply to rustred, 07-12-2018 17:00:37  
Just like a 3406 C model cat, there is something in the pump that malfunction's and it sound's like a rod coming out the side any minute, help me with the details Caterpillar guy or somebody !!



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