blind head bolt holes in block

[Loren Warman]

Is there a set pattern of blind head bolt holes in a 1952 8n block that could cause a hydraulic burst if thread sealer is applied to the bolt threads ?
Thanks Loren

 

[Den N Ms]

Loren ,Its a possibility ,depending how much is gooped on the threads and if the hole has been cleaned out,threads chased with a bottom tap and blowed out or if it left with gunk and anti freeze,water that ran down the bolt hole.Best bet is to just use sealer on the holes that are open and go into the water jacket to stop leaks from around the threads.

 

[Den N Ms]

Loren,There has been many a block corners cracked because ham fisted guys have cranked them down and not cleaned them out.

 

[Dell (WA)]

yep........thats what "Q-Tips" are fore.......Dell

 

[Hobo,NC]

(quoted from post at 23:45:32 10/17/11) Is there a set pattern of blind head bolt holes in a 1952 8n block that could cause a hydraulic burst if thread sealer is applied to the bolt threads ?

Thanks Loren

I have never seen a blind head bolt hole on a N engine...
It may be full of crud but never one that was cast blind... But I have not see'em all...

 

[Tom N MS]

Mine don"t have blind holes either..

 

[Loren Warman]

Thanks.....I thought that I had seen a posting that indicated there was a possibility of this.I now have the stuck valve problem fixed and I am ready to install a new head gasket and quit bothering you guys with dumb questions.Many thanks to all the Tractor Forum is absolutely a must for anyone with an old machine and a bunch of guys who knows how to make them tick. Loren

 

[JMOR]

(quoted from post at 21:58:24 10/17/11) Thanks.....I thought that I had seen a posting that indicated there was a possibility of this.I now have the stuck valve problem fixed and I am ready to install a new head gasket and quit bothering you guys with dumb questions.Many thanks to all the Tractor Forum is absolutely a must for anyone with an old machine and a bunch of guys who knows how to make them tick. Loren

h, you have seen such postings, but just remember that many things that are 'known to be true' are not.

 

[Hobo,NC]

If you have one that's blind then you need to go dig'n,,, a Q tip want do it...
No one knows it all tho some will argue it either by a fancy word are they wrote the book are a book but In this case I have not seen it tho it may be possible... Its rare to see a hole are 2 blind,,, they are all wet are all blind.. Their may be the rare case...

 

[Gaspump]

Sure can break the block with a hydraulic force of a head bolt. Junk in the hole and also way too much oil on threads and in the hole. Never oil up the block threads just light oiling on the bolt/stud will do. Hobo is correct, trash must be agressively dug out of the blind hole, not a job for a Q-tip!

 

[JMOR]

(quoted from post at 10:10:35 10/18/11) Sure can break the block with a hydraulic force of a head bolt. Junk in the hole and also way too much oil on threads and in the hole. Never oil up the block threads just light oiling on the bolt/stud will do. Hobo is correct, trash must be agressively dug out of the blind hole, not a job for a Q-tip!

low day for 'real' tractor problems, so I spent (wasted) a little time searching archives. Found various posters statements on number of blind holes in head mating surface of N-tractor blocks. I no doubt didn't get all of them, but a sprinkling is that the number is: 0, 1, 2, 7. Now, I surmise that people don't really know or that all N-blocks are not equal in the blind hole count. Interesting.

 

[Hobo,NC]

The manifold studs (4) go in the block directly under 4 head bolts,,, they are not blind but crud could cause a obstruction... Are if to long of a bolt used could cause a mess...

 

[JMOR]

(quoted from post at 12:22:43 10/18/11)
The manifold studs (4) go in the block directly under 4 head bolts,,, they are not blind but crud could cause a obstruction... Are if to long of a bolt used could cause a mess...

es, looks like the fellow who said 7 did include those 4 (may go into water, not blind, but long bolts still a problem). So, now we are down to 0,1,2,3. The fellow who said they all go into water, did specifically say 1939 block.

 

[Harry Wilken]

As I understand it, these old blocks were sand castings. Would that not mean that no two are really the same? When I was cleaning my block I found a 12 inch peice of heavy wire in water jacket under headbolt holes.