CBRF3
Full Access Member
Kool I thought those were out of the 6.9 I built a replacement motor for a while back the head was bad a hair line crack between valves ( had a nasty overheat ) the owner of said truck neglected the previous motor badly and worked the living crap out of it he ran it out of oil on interstate at 75mph hauling a load of sand in a dump truck and rather than seize up it started knocking so bad it was scary and was scorching hot he gave me the block as it was destroyed so messed up a bore job and all bearings replaced would not fix it the block had cracks I was salvaging anything I could on it so I pulled the cups and that is why I had them they were still useable and good.What Im finding on them is the 88 ones are the 7.3 like I got from you. The early 6.9 would be the one with the bigger port and chamber, is a bit thinner and may have a difference in the head.
pre-cup 7.3-6.9
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The heads on the 6.9 have look to be the latter cups with the smaller throat, this is from when they were pulled for head gaskets.
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The motor I built didn't fail the one he had before failed due to his negligence and lack of maintenance and way he ran the thing he ran it like he stole it and didn't show any sign of care so you understand he couldn't find any of these in descent condition so I built him one and those cups came from his old motor I deemed them useable as these things are getting hard to find / get you have to salvage nearly anything you can to keep parts around.
Needless to say after i built him a motor and he had his bussiness on hold and had to use a rental vehicle ( price a dump truck weekly rental its insanse ) he then wised up and daily checks fluids on all his vehicles and does maintenance I built him a motor out of used parts i had just laying around and charged him nearly nothing but I had a stern rule i ever heard he was neglecting it or mistreating it i would never work on a single thing he owned nor would i help him with parts for 3 of his trucks running our motors. He had a heck of a time getting anyone to even offer to work on these motors and even fewer even knew these motors well enough to accept the work not even getting into some of the parts and theyre prices. He found out quickly neglecting these things would cost him alot of money / down time and it was better to keep them maintained as he priced new and used diesel trucks along with theyre requirements / maintenance / repair cost and found out quickly it was much cheaper to keep what he had and do the maintenance on them vs newer trucks injection system and DPF / DEF and such along with the dealership / shop repair costs our old IDI's in retrospect are cheap to keep going vs newer stuff if you can work on them yourself or got someone who knows them and how to work on them.
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