1952 Cub Valve Seat Question

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
jakescubs
Posts: 17
Joined: Wed Apr 29, 2020 4:55 pm
Zip Code: 36521
Tractors Owned: 1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450

1952 Cub Valve Seat Question

Postby jakescubs » Wed Apr 29, 2020 5:26 pm

This tractor has been the source of my woes for the past two years now, it seems every time I get something working another thing decides to break. I did a complete overhaul on the engine, as it was completely seized, the cylinders were pitted, and the previous owner snapped 8 head bolts off inside the block and completely destroyed the bolt holes. I got the cylinders bored .060 and threaded inserts put in by a very reputable engine shop in my area, and the engine ran beautifully when i got it back together. Of course, something had to go wrong, and one of the threaded inserts backed out of the deck and cracked the block. So fast forward to now, I bought an engine block on Ebay that’s in very good condition besides two of the valve seats, which are very pitted and worn(I did not notice the valve seat issue until I was able to do a thorough check of the block when it arrived). I could take the block up to the engine shop and get it counterbored and have new seats pressed in, but I’ve already invested so much money in this tractor that I’m reluctant to spend too much more on it. What should I do?

Mht
Cub Star!!
Cub Star!!
Posts: 396
Joined: Sun Jul 08, 2018 9:02 pm
Zip Code: 27606
Tractors Owned: 1949 farmall cub(building from parts) 1950 farmall cub
1971 David Brown 880 selectamatic
Circle of Safety: Y

Re: 1952 Cub Valve Seat Question

Postby Mht » Wed Apr 29, 2020 6:17 pm

I salvaged a block last year that had badly pitted exhaust seats. The cost was only about a hundred bucks for seats and machining. I wouldn’t let a hundred bucks stop me from finishing a rebuild

inairam
5+ Years
5+ Years
Posts: 2358
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: 1952 Cub Valve Seat Question

Postby inairam » Wed Apr 29, 2020 6:33 pm

Jake, You are not investing in the tractor, You are investing in your hobby. That is was I tell people anyway.

I assume you are going to swap out the new pistons and other things from the cracked block into the ebay block. The piston will not fit unless you know the eBay block was 0.060 over already. So a trip to the engine shop in your future.

If the ebay block is 0.060 over I used Neway cutters to cut the seats http://www.farmallcub.com/phpBB2/viewto ... 1&start=15 . I have heard of people running two exhaust values in one cylinder that had bad seats that took a lot of material to get to solid metal. ( not recommending not tried it my self just saying what I have a heard)
When you only have 9 horsepower you need to know the names of all of the ponies!

jakescubs
Posts: 17
Joined: Wed Apr 29, 2020 4:55 pm
Zip Code: 36521
Tractors Owned: 1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450

Re: 1952 Cub Valve Seat Question

Postby jakescubs » Wed Apr 29, 2020 6:52 pm

Thank you guys for your replies, I’m gonna make a trip to the engine shop tomorrow and get them to take a look at it. The cylinders are in good condition and haven't been bored oversize, so I hope I can get away with honing the cylinders and installing new standard pistons and rings. Since I’m a junior in high school, it’s been difficult to juggle school work and finding time to work on restoring my Cub, but I’m gonna be so glad when I can get it finished and plow some fields.
1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450
Tractors are like vacation days; you can never have too many.
:tractor:

tst
10+ Years
10+ Years
Posts: 4692
Joined: Tue Jan 12, 2010 2:08 pm
Zip Code: 12514
Circle of Safety: Y

Re: 1952 Cub Valve Seat Question

Postby tst » Wed Apr 29, 2020 6:59 pm

I would be having a talk with the machine shop who put the seat in, if it was installed correctly it would never had come out, a good shop would stand behind an issue like that, I install a lot of valve seats in these engines, I use press in seats, do not like the thread types, never had a issue yet, just did this block a few days ago, it was seized from water in the block and ate away the metal around the seat, had to use a larger seat and machine the seat down to fit the block, you can still see a couple pitts in the block but that will not affect anything, the bluing on the seat is from fitting the seat, this block got 4 exhaust seats, you can see the one on the right is larger on the OD than the one on the right, ended up boring this .040 over because of the water damage
Attachments
IMG_5874.JPG
IMG_5872.JPG
IMG_5871.JPG

jakescubs
Posts: 17
Joined: Wed Apr 29, 2020 4:55 pm
Zip Code: 36521
Tractors Owned: 1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450

Re: 1952 Cub Valve Seat Question

Postby jakescubs » Wed Apr 29, 2020 7:06 pm

tst wrote:I would be having a talk with the machine shop who put the seat in, if it was installed correctly it would never had come out, a good shop would stand behind an issue like that, I install a lot of valve seats in these engines, I use press in seats, do not like the thread types, never had a issue yet, just did this block a few days ago, it was seized from water in the block and ate away the metal around the seat, had to use a larger seat and machine the seat down to fit the block, you can still see a couple pitts in the block but that will not affect anything, the bluing on the seat is from fitting the seat, this block got 4 exhaust seats, you can see the one on the right is larger on the OD than the one on the right, ended up boring this .040 over because of the water damage


I didn’t have new valve seats put in the original block because the original seats were still fine, the problem was one of the threaded inserts that was put in a stripped head bolt hole backed itself out and cracked the block. Eight of the twelve head bolt holes had to have threaded inserts put in.
1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450
Tractors are like vacation days; you can never have too many.
:tractor:

Rob in NH
10+ Years
10+ Years
Posts: 2676
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

Re: 1952 Cub Valve Seat Question

Postby Rob in NH » Wed Apr 29, 2020 7:24 pm

Tim, do you do your own machine work too?
Image

tst
10+ Years
10+ Years
Posts: 4692
Joined: Tue Jan 12, 2010 2:08 pm
Zip Code: 12514
Circle of Safety: Y

Re: 1952 Cub Valve Seat Question

Postby tst » Wed Apr 29, 2020 7:48 pm

Hi Rob, yes I do, do not do crankshafts, I do valve seats, grinding and boring, some times I have another shop bore for me as I do not have a dedicated setup and takes to much time if I am busy to swap it around

Rob in NH
10+ Years
10+ Years
Posts: 2676
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

Re: 1952 Cub Valve Seat Question

Postby Rob in NH » Wed Apr 29, 2020 7:52 pm

wish you were closer
Image

tst
10+ Years
10+ Years
Posts: 4692
Joined: Tue Jan 12, 2010 2:08 pm
Zip Code: 12514
Circle of Safety: Y

Re: 1952 Cub Valve Seat Question

Postby tst » Wed Apr 29, 2020 8:00 pm

just put a couple stamps on the parts and throw them in the mail !

Rob in NH
10+ Years
10+ Years
Posts: 2676
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

Re: 1952 Cub Valve Seat Question

Postby Rob in NH » Wed Apr 29, 2020 8:32 pm

would need lots of stamps haha
Image

jakescubs
Posts: 17
Joined: Wed Apr 29, 2020 4:55 pm
Zip Code: 36521
Tractors Owned: 1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450

Re: 1952 Cub Valve Seat Question

Postby jakescubs » Thu Apr 30, 2020 3:23 pm

Update: I took the engine to my machinist, and he said that he could put in new seats for $90 a seat. He also said that the block needed new valve guides, so I’m gonna reuse the new guides I put in my old block. Any tips on how to press the guides out of the block?
1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450
Tractors are like vacation days; you can never have too many.
:tractor:

inairam
5+ Years
5+ Years
Posts: 2358
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: 1952 Cub Valve Seat Question

Postby inairam » Thu Apr 30, 2020 4:31 pm

Did you talk to him about the cracked block?
When you only have 9 horsepower you need to know the names of all of the ponies!

jakescubs
Posts: 17
Joined: Wed Apr 29, 2020 4:55 pm
Zip Code: 36521
Tractors Owned: 1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450

Re: 1952 Cub Valve Seat Question

Postby jakescubs » Thu Apr 30, 2020 5:33 pm

inairam wrote:Did you talk to him about the cracked block?


Yes, he said the crack was most likely caused by the threaded head bolt hole insert backing out of the block.
1952 Farmall Cub
1972 Cub Cadet 128
1977 Cub Cadet 1450
Tractors are like vacation days; you can never have too many.
:tractor:

inairam
5+ Years
5+ Years
Posts: 2358
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: 1952 Cub Valve Seat Question

Postby inairam » Thu Apr 30, 2020 6:12 pm

jakescubs wrote:
inairam wrote:Did you talk to him about the cracked block?


Yes, he said the crack was most likely caused by the threaded head bolt hole insert backing out of the block.


Did he offer any compensation or to help switch over the parts? If it was his work that caused the failure I think he should compensate you somehow.
When you only have 9 horsepower you need to know the names of all of the ponies!


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: PFord and 4 guests