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Farmall & IHC Tractors Discussion Forum
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Need ideas on why this Sup M has blow-by and blowi

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jonesy

09-15-2004 16:49:21




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Need some ideas fellas. Ok , I got a 53 Sup M with a 281c motor and LP head. Engine runs real good, very very minimal smoke. The crank case vent is puffing and blowing oil out. Oil is also weeping out around the head gasket and down the motor block. I tightened the head down to spec and no change. I dont seam to be mixing fluids. Someone added a valve cover vent like a car at some point and when removed it blows oil everywhere. I performed a compression test and got #1 -125, #2- 127, #3- 133, #4- 135. I then added oil for a wet test and the compression went up 10#'s consistanlly on all four. I thought rings @ first but Im leaning more to head gasket. Has anyone ever seen a blown head gasket pressurize the head, crackcase and such??

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John A.

09-15-2004 20:28:43




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 Re: Need ideas on why this Sup M has blow-by and b in reply to jonesy, 09-15-2004 16:49:21  
Jonesy, Is this on your Lil'Darlin that you painted the other day? Anyway while you are down that far, go ahead and mic the rod journals for you peace of mind. They are probably OK but you never know.
Hollar if I can be of help. I uncovered also send me anything so I can get you email back in my address book. I do still want that water jacket cover.
Later,
John A.



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jonesy

09-15-2004 19:54:54




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 big problem found in reply to jonesy, 09-15-2004 16:49:21  
Just got in from pulling the head and pistons. I checked the end gap on the rings and its .164. Books says .013 to .028. Looks like honing and rings for sure. If Im getting 130 lbs out of bad rings so what the heck will it do with good ones???? Will the motor handle 160#'s +++ compression or should I find an 8060 M head for it.



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MagMan

09-16-2004 10:58:14




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 Re: big problem found in reply to jonesy, 09-15-2004 19:54:54  
Hey Jonesy , Email me for my tractor parts web site If you want Im sure I can save you a little money. abuckmaster147@wmconnect.com JON



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lee

09-16-2004 08:47:32




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 Re: big problem found in reply to jonesy, 09-15-2004 19:54:54  
you measured that with a ring set square in the cylinder? .164!!! Did you check more than 1 ring? Several places in the bore? That number is sooo large it makes me wonder what you have there and recommend that you check more rings in each cylinder and check all the cylinder bores for taper and size and also check piston fit in the cylinders (if you plan to reuse the pistons) to make sure all is well and someone hasn't just stuffed some misfitting parts in there to get it going and sell it. Good luck. You have found your problem, now fix it right.

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jonesy

09-16-2004 16:23:00




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 Re: big problem found in reply to lee, 09-16-2004 08:47:32  
The history on this tractor suppossedly is the motor was rebuilt by the local IH dealer about 9 years ago and only had around 100hrs since. My problem is I assumed it was ok and rebuilt everything from the clutch back. I did run it before painting and it seamed ok. All this extra trouble is what I get for assuming. Nothig like ruining a nice and expensive paint job right off the bat. The pistons are IH aluminum and the # is 366483 R1 B. A couple of them have ignition craters in them and a few jagged edges where this occured. I called up the auto parts place where the head is being once overed and gave them the ring # and they ordered rings. I hope those are the right pistons for the motor. The sleaves appear ok and have a minor shoulder @ the top that should be fine with a little honing. The bearing appear brand new and the crank journals look great.

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Tim Malin

09-15-2004 20:08:01




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 Re: big problem found in reply to jonesy, 09-15-2004 19:54:54  
That hurts, man. I just bought a 53 Super M and there's antifreeze draining into the oil. I'm hoping head gasket, and at this point it seems likely. I don't know what kind of pistons you have in that tractor, but the 281 and LP head was a super common power procedure. It will handle that compression, that is what the head was designed to do. I bet you will crank one heck of a lot of power out of er when you complete the job. Good luck and keep us posted.

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Hermit

09-15-2004 18:50:26




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 Re: Need ideas on why this Sup M has blow-by and b in reply to jonesy, 09-15-2004 16:49:21  
Sounds like the oil breather line to the air cleaner is clogged. The intake manifold is suppose to draw air from the crankcase to create a slight vacuum and prevent oil from blowing out the seals. Could be clogged with oil sludge.



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lee

09-15-2004 17:43:42




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 Re: Need ideas on why this Sup M has blow-by and b in reply to jonesy, 09-15-2004 16:49:21  
You didn't give any history of the motor. I don't know what compression that motor should have. Those numbers seem high but compression may be higher on LP head. 10 lb increase with oil in the cylinders seems like it's got some blow by there. Have you removed the valve cover? What's it look like. Is the motor sludged up? Is oil returning to the crankcase from top of head as it should? Oil at the head gasket. You could replace the head gasket just to see if it helps. If it doesn't work (I kinda doubt it will) you will have to at least put some new rings in it. I think it's a tough call for anyone to say, definitely head gasket or definitely rings.

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MAGMAN

09-15-2004 17:33:13




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 Re: Need ideas on why this Sup M has blow-by and b in reply to jonesy, 09-15-2004 16:49:21  
How about the wrong or bad oil filter or overfilled with oil,Maybe you could try running some berrymans in the motor for the 15 mins and then draining and refill the oil.in case there is some clogging going on. JON



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