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Tractor Talk Discussion Forum

Diagnose these spark plugs...

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Matt

06-05-2004 16:34:00




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I changed my oil, added hydraulic fluid, and while I was waiting for the last itty bits of oil and gunk to drain, decided I should finally do the plugs the on the 1955 TO-35 I bought last year.

Pulled No. 1 out to bring to NAPA to get a replacement...Wow, dude!

Anyway, decided I'd take photos and post them here (link to my site below to see them!) and get feedback on what they're telling me, and what I can do until I get around to a re-build!

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Jerry/MT

06-06-2004 16:32:47




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
#1 looks to e oil fouled. Oil control rings are probably bad.# 2 has a burned insulator that could be due to advanced timing or too lean a mixture.#4 looks normal but worn. Can't figure #3 out. Looks like it's melted. Could be timing or mixture or both. Pull the plugs that you just put in after running them for a few hours then read 'em. Also check your compression.



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Allan

06-06-2004 18:04:36




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 Re: Re: Diagnose these spark plugs... in reply to Jerry/MT, 06-06-2004 16:32:47  
Hi Jerry,

Go back and look again; they are all pushing oil. Just different degrees of the nasty stuff is all.

Allan



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Allan

06-06-2004 11:34:54




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
Matt,

Park it until you can rebuld it. That engine is shot.

Allan



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Tom

06-06-2004 06:10:44




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
Matt, first things to do: REPLACE WITH NEW dist cap, rotor cap, points, condensor, plug wires, coil. Next, set timing, remove and clean all battery post connections, and other end of heavy wires at starter end. Trace, remove, clean & replace wires to coil and dist. Second things to do. Add 1 qt or engine flush, let idle 10 minutes and drain, change oil and filter. Use 15W40 Mobil Delvac 1300.
Third things to do. Remove and replace with NEW thermostat, flush cooling system, refill with 50 50 mix of antifreeze and distilled water. Clean fins with air compressor. Assure that engine is operating at recommended temps.
Fourth things to do. Now use tractor for at least a couple of days hard running. Then do a compression test, squirt oil in cylinder and repeat compression test. Write down all results by cylinder. Remove and inspect the plugs, carefully noting condition.
AFTER these things you can assess whether a rebuild in necessary, valve seals are leaking, etc.
Good luck.

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George

06-06-2004 10:34:21




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 Re: Re: Diagnose these spark plugs... in reply to Tom, 06-06-2004 06:10:44  
Before you unscrew the plugs, mark the upper hex of the plug body with a magic marker. Take the plug out. Orient the plug such that the marked hex flat is up. Is the greatest build-up pointing to the intake valve? If it is, then you have leaking/loose valve guides.



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wdtom

06-05-2004 18:44:42




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
I would do a compression test. Then squirt oil into the cylinders, if it comes up a bit it is a sign the rings are worn out. Which you probably know anyway. Likely it is rings as it looks like you are getting a lot of oil up in the combustion chamber. Other than an overhaul the only thing you could try is a couple of ranges hotter plug to try and keep them burned off. And keep the engine running on the warm side of normal too. Like 200 degrees. A warm engine will keep the plugs cleaner than a cold one.

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Burrhead

06-05-2004 17:52:39




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
Matt if ye clean the points and set the time you orta be in bizness. Adjust the valves & carb then yer all done.

I use a vacuum gage instead of a timing light to set the timing and to set the carb both.

A geek with time and a camera too huh??LMAO keep up the good work.



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Jim in Va

06-06-2004 18:57:57




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 Re: Re: Diagnose these spark plugs... in reply to Burrhead, 06-05-2004 17:52:39  
Burrhead - off topic but do you still have those pictures showing how to use a Sitrex rake as a tedder? Sure could use them if you do. I've read your post about that several times but still don't know what I'm supposed to do.



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RayP(MI)

06-05-2004 16:50:57




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 Re: Diagnose these spark plugs... in reply to Matt, 06-05-2004 16:34:00  
Well, I'm no expert, but I think all 4 are speaking to a need for a rebuild. Looks to me like there is oil leaking past the rings, or valve guides. Am not familiar with that engine, but some have some sort of a seal atop the valve guide which is accessable from the top of the engine - these would be fairly easy/inexpensive to renew. I'm sure there's someone on the board that can give you authorative info on this. #4 Plug looks like oil is dribbling down on it from outside and coating the shell - does it have a leaky valve cover gasket?

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UncleTom

06-05-2004 19:45:30




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 Re: Re: Diagnose these spark plugs... in reply to RayP(MI), 06-05-2004 16:50:57  
I have a plug sandblaster and use it all the time. I wouldnt live with out it. It cleans plugs like new.



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