Ford 4000

mkuhns · Feb 13, 2016

I have a 1966 Ford 4000 that has a 192 gas in that I'm overhauling because of blowby. #3 piston has two rings broke and top one partially missing. At what point is it still permissible to use std pistons. The bores aren't torn up too bad that honing may clean up the cylinder. If I have to have it bored, is there any cylinder issues that typically result afterward? I'm just worried about the life of the block being bored. Is cracking or porous holes leading into the cylinder prevalent to these engines? I haven't measured the bore yet to see what size it is. What are the specs for bore size and recommendations to install oversized pistons. Most engines I work with you can hone about .008 over before boring. Any help or recommendations would be appreciated. I don't want to do this job twice. Thanks in advance.

Brian Allen · Feb 28, 2016

mkuhns
First, you should post this in the Ford Forum!
What I have been told, is the rear cylinders are often eaten through from the water jacket. My 555 TLB had this, patching will only borrow a bit of time, a reliable machine shop will re-sleeve it and bore back to standard size.
Let me know if you need more help.
Regards
Brian

Welding man · Feb 28, 2016

I have done dozens of these engines,mostly diesels. My opinion may not be too good to you because I do it for customers and I have to guarantee my work. I do not do partial overhauls or inframes,because of too many comeback issues. If I bore one of these engines, I sleeve it back to standard. I bored a couple oversize a few years back and six months later,I was redoing them for nothing because of a sand hole opening up in them. I do not have the specs for taper or out of round handy, they are at the shop. I also don't work on anything without a good service manual laying close by.

Ford 4000

mkuhns

Member

Brian Allen

Well-known Member

Welding man

Well-known Member

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