How do I remove the rear lifter with the oil line in the way?
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Topic author - Posts: 1241
- Joined: Mon Jan 07, 2019 8:01 am
- First Name: Mark
- Last Name: Nunn
- * REQUIRED* Type and Year of Model Ts owned: 1926 Runabout
- Location: Bennington, NE
- Board Member Since: 2017
How do I remove the rear lifter with the oil line in the way?
I am preparing to buy new valves and lifters for my Runabout. I removed the 2-piece valves and measured the valve guide diameters. I took measurements at the top, center and bottom. Paragraphs 217 and 219 in the service manual say to insert a new valve and check for clearance. The maximum is .008”. I don’t have a new valve to check and my old valves are too worn out to trust.
What is the actual stem diameter of the new standard valves from our trusted suppliers? Chaffin’s and Snyder’s catalogs don’t give a measurement. Lang’s states .312”. They also mention that the modern valves are .030” over or .340” stems. Wouldn’t that make stock .310”? Older posts that I read vary and some say .3125”.
If new stainless valves are .312”, my guides are well within the service manual tolerance. If they are .310”, it’s time to go oversized. The easy thing to do is just ream and use oversized valves. I would rather be conservative and preserve as much originality as possible for the next generations.
What is the actual stem diameter of the new standard valves from our trusted suppliers? Chaffin’s and Snyder’s catalogs don’t give a measurement. Lang’s states .312”. They also mention that the modern valves are .030” over or .340” stems. Wouldn’t that make stock .310”? Older posts that I read vary and some say .3125”.
If new stainless valves are .312”, my guides are well within the service manual tolerance. If they are .310”, it’s time to go oversized. The easy thing to do is just ream and use oversized valves. I would rather be conservative and preserve as much originality as possible for the next generations.
Last edited by Mark Nunn on Sat Nov 11, 2023 4:03 pm, edited 1 time in total.
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Re: What is the actual stock valve stem diameter?
Original Ford specs are, stem .3105" to 312" and guide holes .3125"
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Re: What is the actual stock valve stem diameter?
You are putting new valves in, so changing the stem diameter would not be that much of a jump. Also consider how many miles the car was driven in the past to get any wear along with how many miles will it be driven in future.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1948 Ford F2 pickup

1925 Cut down pickup
1948 Ford F2 pickup
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Topic author - Posts: 1241
- Joined: Mon Jan 07, 2019 8:01 am
- First Name: Mark
- Last Name: Nunn
- * REQUIRED* Type and Year of Model Ts owned: 1926 Runabout
- Location: Bennington, NE
- Board Member Since: 2017
Re: What is the actual stock valve stem diameter?
Yeah, Mark. I will be going oversized. A friend of mine locally has a set (well, 7) of new oversized valves. He wants to get rid of them and I can lighten his load. It's a win-win. The ONLY advantage I see using standard valves is that I don't have to pull the engine. I can't get a reamer to the rearmost valve. It's not a big deal, though.
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Re: What is the actual stock valve stem diameter?
It is a bit of a fallacy in thinking one can ream the valve guides free hand and still be square to the seat, get yourself a good 3 way seat cutter as well.
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Topic author - Posts: 1241
- Joined: Mon Jan 07, 2019 8:01 am
- First Name: Mark
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Re: What is the actual stock valve stem diameter?
Yes, Frank. A Neway cutter set (46, 31 & 60 degree) is on the list. I was waiting until I knew which pilot to order. I'll make a reaming fixture like what Scott Conger posted in an earlier thread. That will hold the reamer in alignment.
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Re: What is the actual stock valve stem diameter?
if the valves are .030" over, you will still need both reams, .015" as well. the 30 is too big to cut a standard guide in one go.
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Topic author - Posts: 1241
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How do I remove the rearmost lifter?
I am replacing the cam, valves and lifters with the engine in my car. The oil tube is blocking the rear lifter head. I don't want to remove and disassemble my engine for a simple job. What have you done to get the lifter out?
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Re: How do I remove the rear lifter with the oil line in the way?
I don't think there is a way to remove the oil line without removing the flywheel. That would involve pulling the engine and transmission and removing the crankcase and flywheel. Might as well overhaul the entire power unit , magneto, and transmission if you go to that extent. It is possible to file the top of the lifter smooth if it is pitted, and then grind the valve stem to the proper clearance. That's the way it was originally done by Ford. Adjustable lifters are great for getting the optimum performance and quietness, but difficult to place without pulling the engine.
Norm
Norm
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Topic author - Posts: 1241
- Joined: Mon Jan 07, 2019 8:01 am
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Re: How do I remove the rear lifter with the oil line in the way?
I got the lifter out. There was a little flex in the tube. I got the lifter head started against the tube. I cut down a spare pushrod from my Thunderbird and gently tapped the lifter down from above. The pushrod is the same diameter as the valve stem.
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Re: How do I remove the rear lifter with the oil line in the way?
Good. I hope the solder joint held inside the Hogs Head. Where the line is connected to the funnel.
Norm
Norm
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Re: How do I remove the rear lifter with the oil line in the way?
Think the hole it passes through is tight enough there shouldn't be much flex at the solder joint.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1948 Ford F2 pickup

1925 Cut down pickup
1948 Ford F2 pickup
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Re: How do I remove the rear lifter with the oil line in the way?
Just for your information.
viewtopic.php?t=1081
viewtopic.php?t=1081