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52 8n valve adjusment questions

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chuckinNC

03-02-2002 06:54:16

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Im gonna atempt to adjust the valves on my 1952
8n this morning but dont have a manual.does anyone
know the settings for cold engine? Also is there any special tools or things to look
out for? Ive read past post about spraying carb. cleaner on the springs,tappet assembly to clean them up
Is this a good idea?

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ZANE

03-02-2002 18:17:49

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Re: 52 8n valve adjusment questions in reply to chuckinNC, 03-02-2002 06:54:16

VALVE ADJUSTING ON THE 4 CYLINDER ENGINE
Their is a set of two valve adjuster holders that are supposed to be used to adjust the valves on the N tractor. If you don't have these tools you can improvise by drilling the holes in the tappett chamber sides after each piston is on TDC compression stroke and the valves are ready to be adjusted.
It is possible to hold the tappets so that they can be adjusted by drilling a 1/8� hole in each tappet through the block after they are lined up on top dead center of the compression stroke for each cylinder. Drill the hole as close to the center of the tappet as possible. A smaller drill bit than 1/8� inch can be inserted into the hole to hold the tappet so the adjusters can be turned. Recheck the clearance after the drill bit has been removed. The piston should be on TDC of the cylinder you are adjusting. If you will start with the #1 cylinder and make a mark on the front pulley with a whiteout pen etc and then a reference point to it on the block somewhere then make another mark on the pulley 180 degrees across. After you have adjusted the first #1 cylinder to get the next cylinder in the firing order to TDC turn the engine untill the next mark on the pulley is at the reference point mark and adjust the second cylinder in the firing order. Do this turning the engine 180 degrees each time till the next pulley mark is at the reference mark until all four cylinders have been adjusted or checked. This procedure keeps you from having to find the compression stroke on all the rest of the cylinders.

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James Durby

03-30-2004 03:35:25

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Re: Re: 52 8n valve adjusment questions in reply to ZANE, 03-02-2002 18:17:49

What's the valve stem clearance for the Exhaust
and Intake valves on an 8N Ford (4 cylinder).

Thanks for anyones help, please answer soon.

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chuckinNC

03-02-2002 19:25:43

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Re: Re: 52 8n valve adjusment questions in reply to ZANE, 03-02-2002 18:17:49

Thanks for the reply Ill try it,after I buy a few
new 1/8" bits.This sounds like the stuff they dont
tell you in the manual!

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Dave Smith

03-02-2002 18:57:35

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Re: Re: 52 8n valve adjusment questions in reply to ZANE, 03-02-2002 18:17:49

Zane, I never thought of that. But when you think of it, it is just common sense. Just remember the fireing order 1,2,4,3, For a 6 you would go 120 deg or a 8, 90 deg.
Dave <*)))><

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Dell (WA)

03-02-2002 07:39:50

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Re: 52 8n valve adjusment questions in reply to chuckinNC, 03-02-2002 06:54:16

Chuck..... ...yeah, probably good idea to atleast make an attempt to "de-varnish" the intake valve stems with solvent of your choice.

Ford N-Engine valve clearances: intake 0.010-0.012 cold and exhaust 0.014-0.016 cold, from the I&T FO-4 manual, $29 cheep, gettcha 1 and readitt.

Yes, there are "special" tools for tappet adjustment....ie....ground down wrenches for clearances. Also shown in pictures in the I&T FO-4.

I also believe that if'n ya'd search the "archives" at the top of this most excellent N-Board, you'd probably find some pictures of modified tappet wrenches. BUT I don't have to because I have an I&T FO-4 manual. ..... ..respectfully, Dell

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