Farm Equipment - Uh oh... 200 piston

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Uh oh... 200 piston

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=135718
Printed Date: 01 Oct 2025 at 2:25pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Uh oh... 200 piston

Posted By: TexasWD45
Subject: Uh oh... 200 piston
Date Posted: 02 Mar 2017 at 7:04pm

Well... I ran my 200 for about six hours discing on Tuesday, turned it off for the evening. Next morning started it up and let it warm up for a few minutes (my 200 is cold natured). Put it in first gear to get it moving on to the next field and then! A quite, deep tapping noise from the engine! I turned it off as soon as I heard it. Decided not to start it again but to turn the engine over and see if I could hear where the sound was coming from. Sounds like something in the #4 cylinder, sure enough I towed it back home and pulled the head off. Looks like it blew out the top of the cylinder and threw a ring. Have you guys ever seen anything like this?

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'38 B with belly sickle,'52 WD,'54 WD45,'39 WC,'47 B

Replies:

Posted By: 210Postin
Date Posted: 02 Mar 2017 at 8:09pm

Have your injectors checked would also take a look at you turbo

Posted By: shameless (ne)
Date Posted: 02 Mar 2017 at 9:05pm

that's nasty looking!

Posted By: Dek Thorne
Date Posted: 03 Mar 2017 at 6:41am

At least u knew enough to stop

Posted By: LYNNMN
Date Posted: 03 Mar 2017 at 11:55am

Had it happen on 1969 gas 190

Posted By: DrAllis
Date Posted: 03 Mar 2017 at 12:28pm

Gas engine is not the same piston as a diesel. I'm gonna guess starting fluid damage. Check ALL pistons while apart for broken rings or ring lands.

Posted By: LeonR2013
Date Posted: 03 Mar 2017 at 6:59pm

Better check the rod on that cyl. to see if it is bent. All the suggestions above are relevant. I've seen the inj. do some weird things to pistons.

Posted By: eighty nine
Date Posted: 03 Mar 2017 at 7:08pm

DrAllis wrote:

Gas engine is not the same piston as a diesel. I'm gonna guess starting fluid damage. Check ALL pistons while apart for broken rings or ring lands.

I would agree with the Doctor. You will probably find broken rings on other cylinders as well. Seems common with hard starters & lots of ether.

Posted By: 210Postin
Date Posted: 03 Mar 2017 at 9:40pm

Well if you put that back together with a sleeve and piston without going threw your injectors good luck like i said check your turbo also..

Posted By: TexasWD45
Date Posted: 08 Mar 2017 at 7:03pm

Does anyone know how to remove the front axle pivot pin?

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'38 B with belly sickle,'52 WD,'54 WD45,'39 WC,'47 B

Posted By: Plowjock5
Date Posted: 08 Mar 2017 at 7:32pm

There is a snap ring that holds it in place remove it. The pin has threads in the end of it for a 3/8 bolt. Screw a bolt in so you have something to pull on. You will need to remove a tie rod end it's in the way for the pin to come all the way out. Good luck !