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09-28-2017, 12:34 AM | #1 |
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Location: Cave Junction, Oregon
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tillotson float valves
Hey guys, how do you lap an all metal float valve into a Tillotson carb. They’re a lot smaller than a regular valve, so I don’t have any idea of how to do it. Bill, suggested that I use a coarse toothpaste as a lapping compound, and I agree. I’ll use Pepsodent, but how is the question. Another thing, those things are supposed to be staked (tapped lightly so they seat in the carb), but is lapping required when you are going to stake an all metal valve?
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09-28-2017, 08:08 AM | #2 |
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Re: tillotson float valves
I saw a note on my rebuild kit to stake the float valve, but nothing to lap the valve.
Did the instructions say to lap the valve seat ? Marc |
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09-28-2017, 10:38 AM | #3 |
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Re: tillotson float valves
Marc, these carbs were leaking like mad, so I decided to start all over again as if they were new. I have no instructions, so it's a hit and miss situation. One of the Ford Barn members suggested that I lap the valves, and it sounded sensible.
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09-28-2017, 11:24 AM | #4 |
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Re: tillotson float valves
Some of the modern made valves do not have a smooth finish. What they may have been suggesting is to polish the valve not the seat.
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09-28-2017, 05:51 PM | #5 |
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Re: tillotson float valves
Lapping the valves usually pertains to the intake and exhaust valves. For the carb, first try to just tap the needle into the seat. Test to see if you can suck and hold vacuum by the valve. The soft metal will conform to the other.
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09-28-2017, 06:54 PM | #6 |
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Re: tillotson float valves
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09-28-2017, 06:54 PM | #7 |
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Re: tillotson float valves
Thanks, guys. I've polished the valves with .004 steel wool and am getting ready to stake them in the carbs. I'll let you know how it turns out.
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09-28-2017, 06:55 PM | #8 |
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Re: tillotson float valves
I might if I knew what it was.
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09-28-2017, 07:42 PM | #9 |
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Re: tillotson float valves
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