Dalton Foundry GEP 6.5

[jaydee1445]

After a three month wait while Eastern Surplus moved locations, worked through backlog of orders, and Estes taking forever to deliverer we finally have a Dalton foundry 6.5 Optimizer on the engine stand. After the hand pick and running video charge with freight to Jacksonville we are @ almost $3k not too bad for a low hour optimizer IMHO.....
Unlike the Julian date on the Navistar, no date codes are cast into Dalton blocks . GEP stamps their production code on the driver head. I have reached out to GEP to decode my # 711481

 

[Will L.]

It would be awesome to add decoding that to the list of Navistar and GM.

 

[SnowDrift]

What is Dalton Foundry 6.5?

 

[Will L.]

GEP General Engine Production is a subsidiary of AM General (maker of hmmwvs)- they hired International Navistar to make the optimizer engines back in 2000. Since then about 2015 iirc-Dalton got the contract to make the optimizer.

So there is no longer the diamond in the valley or casting numbers on the right rear of the block for identification.

 

[jaydee1445]

Leroy's post from 2016 here where he broke the news about Dalton becoming the vendor for GEP castings. No diamond or dotted lines. Dalton's logo is a backwards D and F in a circle. 12555506 is also cast in as shown on Leroy's drawing. Lines and 506 are solid VS the dot matrix of the Navastar. There also is a mark on the rear that GEP said is an internal Dalton code. Mine is JD15. Still doing research as time allows. Priority now is pushing to get the 95 1500 off the lift so we can roll the the 96 GMC in to pull the GM 6.5 and drop in the GEP.

 

[SnowDrift]

Where is it? I assume Indiana or Ohio

 

[jaydee1445]

Where is it? I assume Indiana or Ohio

yes locations in both states

 

[SnowDrift]

copy that

 

[jaydee1445]

Swapped 24v DB2 pump to a DS4 today and when we pulled the gear cover we found the internals on the Dalton look brand new. Pump built date was Jan 2015 and the pump gears had 15/18 marked in paint. It might be 15 118 but it confirms this one was built 2015. Even the anaerobic sealer looked new..

 

[SnowDrift]

What's the story on the "506" not in the dot matrix font cast into the block? That seems unique-er than others for which I've seen photos.

 

[jaydee1445]

Acording to what I’ve seen and Leroy’s post that I quoted the dot matrix was Navistar only, Dalton is solid.

 

[SnowDrift]

I guess I wasn't thinking. You had summed that information up well, but I had overlooked it.

 

[jaydee1445]