Valve Guide Chip ; Correction : Lifter Boss Chip
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Topic author - Posts: 1049
- Joined: Tue Jan 08, 2019 10:53 am
- First Name: Terry
- Last Name: Woods
- * REQUIRED* Type and Year of Model Ts owned: 1927 Model T coupe, 1926 4 door sedan
- Location: Cibolo (San Antonio), TX
- MTFCI Number: 20180
Valve Guide Chip ; Correction : Lifter Boss Chip
I have a 26-27 block that has a chip (not more than a quarter inch deep (as measured from the top of the guide) and not more than one third of the circumference of the top of the guide. Do I need to repair this, or will it affect anything if I just leave it 'as is'? I don't have a picture; next time that I go to my parts, I'll take one.
Last edited by ModelTWoods on Fri Oct 30, 2020 12:57 am, edited 1 time in total.
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- First Name: Jeffrey
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Re: Valve Guide Chip
Me, I would catch it next rebuild and not worry.
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Topic author - Posts: 1049
- Joined: Tue Jan 08, 2019 10:53 am
- First Name: Terry
- Last Name: Woods
- * REQUIRED* Type and Year of Model Ts owned: 1927 Model T coupe, 1926 4 door sedan
- Location: Cibolo (San Antonio), TX
- MTFCI Number: 20180
Re: Valve Guide Chip
That's just the point. The block is not in use, and is a spare "rebuilder". Are valve guides replaceable? Is it a problem serious enough to address? I can't see where it would affect the alignment or support of the lifter in the guide. If anything, I would think that it might add additional lubrication to the lifter.
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Re: Valve Guide Chip
Terry, l would not worry about it on a slow running T engine.
I’ve seen so many small engines that broke a timing belt, bent the valves and broke a quarter of the valve guide off.
The machine shop just put new valves in and the head was put back on the engine.
I bought a Daewoo that broke a belt and bent a bunch of valves and broke most of the guides. I figured if the dealer could get away with doing that, I could too.
I put new valves in and it ran at least two years that I know of.
One the T engine a machinist could drill out the block and install a guide.
Ok, I just went out and looked at a late block. The guides are so long that with a quarter inch missing they’re still longer than needed.
Don’t worry about it.
I’ve seen so many small engines that broke a timing belt, bent the valves and broke a quarter of the valve guide off.
The machine shop just put new valves in and the head was put back on the engine.
I bought a Daewoo that broke a belt and bent a bunch of valves and broke most of the guides. I figured if the dealer could get away with doing that, I could too.
I put new valves in and it ran at least two years that I know of.
One the T engine a machinist could drill out the block and install a guide.
Ok, I just went out and looked at a late block. The guides are so long that with a quarter inch missing they’re still longer than needed.
Don’t worry about it.
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Re: Valve Guide Chip
Years ago people use to cut off the guides so they could adjust the three wrench lifters, so if they where not worried about it then why now?
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Re: Valve Guide Chip
Are you referring to the valve guide or the lifter boss ?
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Re: Valve Guide Chip
When I had access to a mill, I use to cut about 1/8” off the lifter boss so I could more easily adjust the lifters. It didn’t seem to do any harm.
If Terry really is writing about the valve guide, I can’t see 1/4” missing causing too much harm. I suppose it could be welded and ream out but knowing my luck it would result in four more cracks.
If Terry really is writing about the valve guide, I can’t see 1/4” missing causing too much harm. I suppose it could be welded and ream out but knowing my luck it would result in four more cracks.
Tony Bowker
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
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Topic author - Posts: 1049
- Joined: Tue Jan 08, 2019 10:53 am
- First Name: Terry
- Last Name: Woods
- * REQUIRED* Type and Year of Model Ts owned: 1927 Model T coupe, 1926 4 door sedan
- Location: Cibolo (San Antonio), TX
- MTFCI Number: 20180
Re: Valve Guide Chip
Thanks to everyone that has given their ideas and opinions. Unfortunately, I had a 72 year old senior moment when posting originally and Steve caused me to catch it. I don't have a chipped valve guide; I have a chipped lifter boss, but some of you have answered my question because you mentioned a lifter boss. I'll not worry about the chipped boss. In fact, I may just take my angle grinder to all the lifter bosses and take off an equal amount off of each one. Thanks to all.