Head Bolts

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goxu1
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Head Bolts

Postby goxu1 » Thu Feb 17, 2022 7:00 pm

Has anyone used TM's head bolts ? Just curious to know if they are any good or not ?
Anyone else sell them the correct lengths ready to go ?
Cripes - I thought I'd never get one.

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Bill V in Md
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Re: Head Bolts

Postby Bill V in Md » Thu Feb 17, 2022 9:12 pm

I installed new head bolts from TM Tractor Parts in 2009, after an engine rebuild, and they are still on the tractor. No leaks and have never had to remove the head. I used non-hardening thread sealer on all bolts so the torque would be uniform on all bolts. Don’t know if another supplier sells correct length bolts.
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Bill V in Md
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Re: Head Bolts

Postby Bill V in Md » Thu Feb 17, 2022 9:44 pm

If you are looking for other options (due to your location) you could purchase standard length Gr. 9 bolts (actually cap screws) and cut them to length, but you should use a nut installed on the bolt to protect the threads. Don’t forget to coat the threads with a non-hardening PTFE thread sealer. I have also read that others have used hardened steel washers under head bolts to get the proper overall length.
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Don McCombs
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Re: Head Bolts

Postby Don McCombs » Thu Feb 17, 2022 10:24 pm

Don McCombs
MD, Deep Creek Lake

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goxu1
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Re: Head Bolts

Postby goxu1 » Thu Feb 17, 2022 10:34 pm

Thanks Don , that a fair difference in price...
Cripes - I thought I'd never get one.

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Barnyard
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Re: Head Bolts

Postby Barnyard » Thu Feb 17, 2022 10:53 pm


Are they the same grade?
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.

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goxu1
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Re: Head Bolts

Postby goxu1 » Thu Feb 17, 2022 10:56 pm

I sent them an email asking the same question , maybe not...
Cripes - I thought I'd never get one.

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Re: Head Bolts

Postby Bob McCarty » Thu Feb 17, 2022 11:13 pm

McMaster-Carr also has what they call "extreme strength grade 9". They are also plated to resist corrosion.
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Re: Head Bolts

Postby SamsFarm » Fri Feb 18, 2022 12:31 am

Careful, with that massive 6.75:1 compression, and all those rpms! Might need grade 13! :)

Watch out for cheap Chinese ones!

Best ask!

I'd reuse my good old ones before contaminating my tractor with Chinese head bolts!

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Re: Head Bolts

Postby inairam » Fri Feb 18, 2022 7:17 am

The head bolt on TM are a grade 8 which should be more than fine. I used the McMastercar grade 9 myself and cut them down.

For me the bigger worry is snapping them putting them in than failure in the field. Remember the grading system was not invented until the 60s I think. I have read here that the dot and IH bolts on the tractors would be just less than a grade 5 if tested to the current standards for bolts.
When you only have 9 horsepower you need to know the names of all of the ponies!

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Re: Head Bolts

Postby Gary Dotson » Fri Feb 18, 2022 8:21 am

The torque spec for the Cub exceeds the rated torque capacity of grade 8 bolts making the grade 9 appealing. I’ve never had an issue, using grade 8 but there is certainly a higher level of comfort with grade 9. I’ve ground them to length (it isn’t very much) and I’ve also used hardened washers. Either way works fine. I think you’ll find that anyone who offers the set is offering grade 8

SamsFarm
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172 Runner Planter
53 Fertilizer
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Re: Head Bolts

Postby SamsFarm » Fri Feb 18, 2022 9:42 am

This will give you a good laugh! :lol:

https://farmallparts.com/Cylinder_Head_Bolt_Kit_For_Farmall_Cub/p27398

If you zoom in they are Triangle brand, grade 8 in their picture
Triangle brand is probably Taiwanese

Check out this page from ARP. American made and available in 1/4" length increments! It gives the part numbers so you can shop around!

https://arp-bolts.mobi/p/bulk.php?pl=1&d=3&p=10&w=2

Clemsonfor
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Re: Head Bolts

Postby Clemsonfor » Fri Feb 18, 2022 5:20 pm

I would think...unless they were scrapped that there should literally be bins full of NOS IH bolts laying around somewhere. Maybe not, maybe they worked through them all since they stopped making them. I would think there would of been literal container fulls of them at various plants.


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