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Farmall & IHC Tractors Discussion Forum
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Lucky Guy(i think)

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SDE

04-21-2006 06:55:56




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I welded the exhaust manifold and then had a bad knock when I started it. I pulled the head last night and except for some dings in the top of one piston, everything looks good. What really surprised me though, was that crap had gotten into three of the cylinders. REMOVE manifold or REPLACE manifold if it needs repair. Tractor Vet had the same experience once and I am only trying to stand behind the advise he had. I am curious as to what else I should check before reassembly. I be out of town for the weekend and will check back Sunday night.Thank you SDE

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captaink

04-21-2006 07:53:45




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 Re: Lucky Guy(i think) in reply to SDE, 04-21-2006 06:55:56  
Make sure that everything from the air cleaner to the valves is clean and doesn’t have any thing hiding in it.

I’m sure there are plenty of those experiences around. I for one had an IH 345 drop a valve and pretty much destroy the engine. I found a different one and rebuilt it but (for some reason I don’t remember why now) decided to use the manifold from the destroyed one. I fired the engine up and it had a knock in it. Finally it started to miss, so I pulled the spark plug out and the electrodes were bent shut. Off came the head. On top of the piston was a chunk of aluminum which had finally imbedded itself next to the cylinder wall and later I found it to have crushed a ring land. Off came the pan and a new piston went in to replace the damaged one. Fired it up again, and it ran fine for about 15 minutes and it started to knock again then miss. Pulled the spark plug out (this time one the other side) and another spark plug was bent shut. Off came that head and the same deal, only this time the piece was still floating but again the pan came off and another new piston went in as it was dinged up pretty badly. The intake also came off and got cooked, baked, high pressure washed and anything else I could think of to make sure that was the LAST piece of crap in it!

Diagnosis was that there was junk in the intake manifold from the piston breaking up when the valve went on the original engine. I had cleaned the intake and was sure there was nothing in it…well captain obvious tells me that it wasn’t clean, and the schooling cost me two pistons and a lot of labor.

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VAJerry

04-21-2006 07:17:42




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 Re: Lucky Guy(i think) in reply to SDE, 04-21-2006 06:55:56  
Check the valves REAL carefully. Had my Super A eat the screws from the butterfly in the carb, brass screws, did a number on one of the valves.



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