The Ford Barn

Bud · 09-19-2016, 09:22 PM

I have noticed that the original tappets for the Model A and Model B are drilled with a lube hole in the center of the tappet facing the cam and I presume this hole connects with the lateral hole in the side of the tappet "shank". Can anyone shed light on the size of these holes, depth and location? Are they indeed for lubrication?
When I had my 8N tractor rebuilt in the mid 1980's the shop doing the work drilled the side of the tappet bosses in the block to lubricate the tappets. I have not seen this done on Model A's or B's but I think it would be a good idea if the current tappets do not have the original lube holes provided by Ford.

tbirdtbird · 09-19-2016, 11:06 PM

an A gets mega splash inside the crankcase

31 Vicky · 09-19-2016, 11:14 PM

My engine builder drilled lube holes in the lifter bosses, figured it can't hurt, should help some.

A's Always
Dave

Jim Brierley · 09-20-2016, 10:45 AM

Drilling holes in the tappet boss could lead to less oil to the main bearings. Leave things as they were designed. If it ain't broke, don't fix it!

Kurt in NJ · 09-20-2016, 11:21 AM

The holes are to hold up the lifters to change the cam without removing the pan, the original solid ones have the hole on the side too

Bud · 09-20-2016, 11:32 AM

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The pictures I have seen on Fordgarage.com show a central hole in the tappet. What purpose does this hole serve? Just to lighten the tappet?

09-19-2016, 09:22 PM	#1
Bud Senior Member Join Date: May 2010 Location: Ohio Posts: 819	Model A and Model B Valve Tappets--Lube Holes? I have noticed that the original tappets for the Model A and Model B are drilled with a lube hole in the center of the tappet facing the cam and I presume this hole connects with the lateral hole in the side of the tappet "shank". Can anyone shed light on the size of these holes, depth and location? Are they indeed for lubrication? When I had my 8N tractor rebuilt in the mid 1980's the shop doing the work drilled the side of the tappet bosses in the block to lubricate the tappets. I have not seen this done on Model A's or B's but I think it would be a good idea if the current tappets do not have the original lube holes provided by Ford.

09-19-2016, 11:06 PM	#2
tbirdtbird BANNED Join Date: May 2012 Location: inside your RAM Posts: 3,134	Re: Model A and Model B Valve Tappets--Lube Holes? an A gets mega splash inside the crankcase __________________ '31 180A

09-19-2016, 11:14 PM	#3
31 Vicky Senior Member Join Date: May 2010 Posts: 106	Re: Model A and Model B Valve Tappets--Lube Holes? My engine builder drilled lube holes in the lifter bosses, figured it can't hurt, should help some. A's Always Dave

09-20-2016, 10:45 AM	#4
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,085	Re: Model A and Model B Valve Tappets--Lube Holes? Drilling holes in the tappet boss could lead to less oil to the main bearings. Leave things as they were designed. If it ain't broke, don't fix it!

09-20-2016, 11:21 AM	#5
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,156	Re: Model A and Model B Valve Tappets--Lube Holes? The holes are to hold up the lifters to change the cam without removing the pan, the original solid ones have the hole on the side too

09-20-2016, 11:32 AM	#6
Bud Senior Member Join Date: May 2010 Location: Ohio Posts: 819	Re: Model A and Model B Valve Tappets--Lube Holes? Sponsored Links (Register now to hide all advertisements) The pictures I have seen on Fordgarage.com show a central hole in the tappet. What purpose does this hole serve? Just to lighten the tappet?