'84 6.9 piston cooling nozzles

[smoky6-9]

I have recently purchased and disassembled a 6.9l out of an '84 f250. I discovered water in the cylinders and the rust pitting in the cylinder walls. im doing this engine as a rebuild project for school so I am willing to spend the time and money to do it right.

I plan on boring the cylinders as much as needed but to do so the piston cooling nozzles must be moved or removed. does anybody have information on the early press-in style cooling nozzles? should I try to bend them out of the way or carefully remove? or does anyone have new ones because I cannot find anything and Ford considers them obsolete...

I appreciate any help or advice.

engine serial number: 6.9DU2U030234

 

[DaveBen]

You might try www.lmctruck.com and search for what you want. Good luck!

 

[Randy Bush]

I do believe you can carefully remove them, you need to note the position of them to reinstall. I would use some locktight when installing them . Been a long time since have worked on one , but it is do able. And yes they need to be removed in order to rebore.

 

[riphip]

Get a newer model block, those jets are pressed in. 85 up & up are bolted in. 84 also had a problem with block cracking at block heater mount hole

 

[Thewespaul]

X2 on get a new block.

 

[TahoeTom]

You must be registered for see images attach

Here is a page from a Haynes manual. Removal is described as using visegrips and a pry bar. No mention if they can be reused or if new ones are necessary, so I assume they can be reused. The correct installation tool and template are probably unavailable. You could probably fab a template from the looking at the picture. You might get away using a template and visegrips to install. How lucky do you feel? I recall a post by a member on FTE who reused press in jets and red Loctite. I doubt he had an installation tool. He had to tear down the engine and said the jets were in there solid. I have an early '85 6.9 and would be reluctant to try myself.

Edit: Just read the text again and it stated to install the "new" cooling jet using the tool, so that probably seals the deal.

 

[Randy Bush]

I agree with the others if can at all find a newer block with bolt in jets you will be better off. I can't find my article on it , but there are other reasons too to use a newer block. The main one was the block casting itself , newer ones had a design change that made them stronger and more desirable blocks to use.

 

[smoky6-9]

i have since located an '86 complete engine for cheap, from what i've read it sounds like i would be better off buying this and junking the '84 block? Maybe sell extra parts?

 

[riphip]

Most all the parts will fit in a box. Scrap the block, build the heads for later, send the cam to Russ. You may need some of those parts later.
You'll be way ahead.

 

[david85]

Way better off with the 1985.5+ block for the reasons already mentioned. The oil jets are bolted in and much easier to work with. Just make sure to check the aim anyway. I didn't have dimensions for the alignment tool, but I compared all of them and found one that was bent (probably by me) and was able to correct it. The later cylinder heads are also less prone to cracking.

 

[jaluhn83]

Don't rush to scrap it. The Jets can be pulled and re used. Use a pair of good vice grips to grap the body right at the block and then use a pry bar to pull them straight out - don't wiggle or pull at an angle. They should come out ok.

Fairly easy to reinstall too..... Take a long 3/8 ish bolt and drill a 5/32 (guess) hole dead center in the end then use a cutoff wheel or similar to cut away one side. Goal is to make it fit over the jet and bear or body. The make a guide from a round chunk of wood or similar to fit in the bearing saddles with a 3/8 hole drilled perpendicular to the axis. Install Jets per service manual above.

Later blocks are nicer, yes, but the press in jets aren't impossible.

 

[Eric Ditwiler]

I have the tool (somewhere) and found new jets on ebay when I rebuilt mine ten or so years ago.

 

[CDX825]

I was under the impression that only the 87 model year blocks had bolt in piston jets?

 

[IDIBRONCO]

No. The 6.9s had the bolt in style for a few years.

 

[jaluhn83]

No. The 6.9s had the bolt in style for a few years.

Sort of. SN 237016, which I believe is somewhere in the 86 year model.

https://www.oilburners.net/threads/6-9-serial-number.82043/