Valve Guide Chip ; Correction : Lifter Boss Chip

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules

Topic author
ModelTWoods
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

Post by ModelTWoods » Thu Oct 29, 2020 2:32 pm

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.


big2bird
Posts: 205
Joined: Mon Sep 14, 2020 10:57 pm
First Name: Jeffrey
Last Name: Hausey
* REQUIRED* Type and Year of Model Ts owned: Early 23 Touring
Location: Anaheim, Ca.
MTFCA Number: 51193
Board Member Since: 2020

Re: Valve Guide Chip

Post by big2bird » Thu Oct 29, 2020 2:50 pm

Me, I would catch it next rebuild and not worry.


Topic author
ModelTWoods
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

Post by ModelTWoods » Thu Oct 29, 2020 3:07 pm

big2bird wrote:
Thu Oct 29, 2020 2:50 pm
Me, I would catch it next rebuild and not worry.
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.


Aarongriffey
Posts: 67
Joined: Sat Jan 12, 2019 10:30 pm
First Name: Aaron
Last Name: Griffey
* REQUIRED* Type and Year of Model Ts owned: 1926 touring
Location: Hayward, ca.

Re: Valve Guide Chip

Post by Aarongriffey » Thu Oct 29, 2020 3:54 pm

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.


Joe Bell
Posts: 1053
Joined: Thu Feb 21, 2019 1:20 pm
First Name: Joe
Last Name: Bell
* REQUIRED* Type and Year of Model Ts owned: 24 Fordor
Location: Tiffin Ohio
MTFCI Number: 24066

Re: Valve Guide Chip

Post by Joe Bell » Thu Oct 29, 2020 4:57 pm

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?

User avatar

RajoRacer
Posts: 4307
Joined: Sun Jan 06, 2019 12:18 pm
First Name: Steve
Last Name: Tomaso
* REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1919 Centerdoor, 1924 TT C-Cab Express, 1925 Racer
Location: Longbranch, WA
MTFCA Number: 14972
MTFCI Number: 15411
Board Member Since: 2001

Re: Valve Guide Chip

Post by RajoRacer » Thu Oct 29, 2020 6:58 pm

Are you referring to the valve guide or the lifter boss ?

User avatar

TonyB
Posts: 663
Joined: Fri Jan 04, 2019 11:15 am
First Name: Tony
Last Name: Bowker
* REQUIRED* Type and Year of Model Ts owned: 1914 touring
Location: La Mesa, CA
MTFCA Number: 32
MTFCA Life Member: YES
Board Member Since: 2005

Re: Valve Guide Chip

Post by TonyB » Thu Oct 29, 2020 10:51 pm

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.
Tony Bowker
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.


Topic author
ModelTWoods
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

Post by ModelTWoods » Fri Oct 30, 2020 12:55 am

RajoRacer wrote:
Thu Oct 29, 2020 6:58 pm
Are you referring to the valve guide or the lifter boss ?
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.

Post Reply Previous topicNext topic