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Success with BN

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Paul H. Perry

01-14-2005 10:22:04

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This summer I purchased a well maintained and old but fairly well restored BN with new rubber. When I brought the little girl home she was running very poorly but, since she seemed to be fairly well intact I figured I could easily fix that. Turned out to be more complex than I planned. Good compression but cylinders 2 and 3 would not fire. New plugs, wires, rotor, points -great spark on all four; rebuilt carburetor; set timing. No change, she was still only limping. I removed the valve cover, eureka! Intake valve guides on 2 and 3 were completely detached from the rocker arm. There was horrible rust and gunk. The springs on the other end of those two rockers were set. Block of wood and a small hammer, tap/tap. Springs were free; slipped the guides under the rocker arms. She started and runs like a new watch.

This may all seem simple to you folks who have been doing this for years but this is one of my first experiences with anything other than the bolt-on auxiliary systems to an engine. Valve cover removal may not seem like much to some of you but it was a big step for me. And it came out very well. Now I have a question. How can I clean up that area under the valve cover without getting crud into the cylinders?

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Haas

01-14-2005 19:24:54

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Re: Success with BN in reply to Paul H. Perry, 01-14-2005 10:22:04

Congrats on figuring you the problem. I hope you checked the push rods to make sure they were straight. Common for them to be bent in situations like you describe. Also you need to adjust the valve rocker arm clearances if you did not do that. If the push rods are bent, or the clearances are not correct, you are likely to have more problems.

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Bill Rolland

01-14-2005 11:43:13

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Re: Success with BN in reply to Paul H. Perry, 01-14-2005 10:22:04

I have no mechanical aptitude either, so when I successfully complete an admittedly minor job like the one you just described (on my '52 Ford 8N), I'm floating all the rest of the day. Congratulations.

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gene b

01-14-2005 11:22:38

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Re: Success with BN in reply to Paul H. Perry, 01-14-2005 10:22:04

You can remove the pan then clean the top with kerosene,diesel fuel or solvent. It will not get into the cycls. Compressed air will help also. Clean the sump on the oil pump while the pan is off also you will be able to clean the bottom area of the block around the crankshaft. After letting it drip clean for a day i would install the pan. Dont worry about a new pan gasket now. Put new oil and filter and any 10-30 oil and start and run for a few minutes then drain. remove pan and clean it. Then new pangasket and filter and new oil again. Wont be perfect but you will have got most of the crud. I have been around these tractors since 47 have 2BNs 4Bs and 4As and some equipment great fun. Two of them have been on tractor rides and have close to 800mi on them each pluss mi going to parades ect. Never any trouble. good luck gene b

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Paul H. Perry

01-18-2005 10:34:54

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Re: Success with BN in reply to gene b, 01-14-2005 11:22:38

Thanks for the pointers, Gene. The BN was parked in the neighbor's barn but we had a couple of warm days there and I brought her home . . . just in time for Zero temps. Too cold to work in the garage for a few weeks to come now. But I'll get to it when it warms up.

According to the forecast, I'll be pulling out the 460 tomorrow to run the snowblower. That will give me freer access to the BN. If it isn't snowing too hard I'll try to get those pictures asked for and try to figure out how to post one or more here.

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Bob

01-14-2005 10:26:52

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Re: Success with BN in reply to Paul H. Perry, 01-14-2005 10:22:04

The "doohickeys" that were out of place are called PUSHRODS.

The the valves pass through the "valveguides" , which are inside the valve springs, and extend down into the head.

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Paul H. Perry

01-14-2005 10:32:59

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Re: Success with BN in reply to Bob, 01-14-2005 10:26:52

Hey, thanks. So the pushrods were out of place and the valves springs were stuck. Got it. Thanks.

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Bob

01-14-2005 10:41:52

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Re: Success with BN in reply to Paul H. Perry, 01-14-2005 10:32:59

Ya, you got it, but where's the pics? That's one of my favorite little tractors!

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