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Ford 9N, 2N & 8N Discussion Forum

Stuck rings

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07-14-2017 17:50:06

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I have had a few tractors I dressed up and sold over the years and a couple were ----- "It ran when we parked it tractors". They would sit till I got one sold then started on the next. I have treated a couple with low compression with the MMO stuck rings medicine. Are stuck rings caused by just sitting? Or something else.

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07-17-2017 01:31:16

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  
Thanks all

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07-16-2017 03:56:25

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  
Quoting Removed, click Modern View to see

Like most other mechanisms, sitting unused gives the rings a change to corrode and gum up.


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Tall T

07-15-2017 19:33:58

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  

You wrote:
Are stuck rings caused by just sitting? Or something else?

A well worn cylinder is funnel shaped so the pistons that got left at the bottom of their strokes are inclined to stick in their grooves to that smaller diameter so that at the tops of their stroke they will let oil by them with the accompanying loss of compression.

If rings are stuck to the wall it is generally rust and/or seriously rotten gas from unburned fuel that has turned to varnish/glue.

Just took the manifolds off my '51 Chev that I haven't started for 15 years and was making note of the sticky residue in the intake ports and on their three flat manifold to head insert split rings

Black goo literally drooled off my carb floats like dark brown tar.

Definitely a mission creep this resurrection. Servicing all engine peripherals like starter, 6 volt gen, carb, glass bowl fuel pump . . . Hope I don't have to rebuild the water pump.

But I've been using fogging oil and other things in my cylinders and rolling it over many times while it sat. I also drive the oil pump with a dummy distributor shaft and an electric drill till I see the pressure climb on the gauge.

Synthetic 15W40 will help clean out the old girl.


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07-15-2017 18:21:08

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  
I had a 52n withsticking lifter I rigged up a button to jog the motor and when the lifter should have been down I took a barused to separate tie rods, put that on the lifter and smacked with a hammer along with transmission fluid generally applied after about 30 smacks it would make the cycle and ran Goode.

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07-15-2017 04:42:39

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  
I recently pulled an old car motor apart. It had stuck rings on one cylinder, and a hung up lifter on that cylinder.

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07-14-2017 19:07:01

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 Re: Stuck rings in reply to Popgun, 07-14-2017 17:50:06  
do not know why they stick,

I have had stuck or sticking valves before, the only thing that worked was 1/2 qt Marvel mystery oil (MMO)in the fuel tank and 1/2 qt. in the oil, after running the engine a short time, the valve freed up and motor ran fine.

MMO may be an old school solution, but it worked for me when nothing else would do the job.

many old timers keep a qt of it around the work shop all the time,

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07-14-2017 20:51:50

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 Re: Stuck rings in reply to wellmax99, 07-14-2017 19:07:01  
Ya put a small amount of ATF or MMO in each cyl and I rolled the engine a couple of turns each day for 3 or 4 days with a hand crank. After 3 or 4 days with the plugs out I crank the motor and expel the MMO out of the cyls makes a real mess. Put plugs in, a gallon of gas mixed with MMO and hook it to a 2 bottom plow and work the tractor like a rented mule. Worked for me. By the way MMO works great on injectors.

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