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#1
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The early 6.9L/7.3L IDI's were a non replaceable sleeve block. These were the ones that experienced the cavitation issue due to FORD not putting the coolant additive in them from the factory and they would develop pin holes through the cylinder walls into the cooling passages. I'm not sure about the 7.3 PS, but I didn't think they had replaceable sleeves. Most any engine can have custom steel sleeves put in it though.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#2
03-27-2008, 10:53 PM
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My friends son had the 7.3 PS which he had the sleeves replaced. I don't remember what year it was though. Could have been custom too for all I know, but I thought he told me otherwise.
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Heavily medicated for your protection.
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#3
03-28-2008, 06:19 AM
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the ones we messed with had the coolant filter(looked like a small oil filter) that had some kind of additive inside the filter, they were real strict about replacing them, and only using oem filters. On a side note, they sent me to Detroit Diesel to learn how to work on the CNG conversion of these motors, they screwed the injectors out, and screwed spark plugs in, DD had all the conversion crap on the outside including the first mass produced, fly by wire throttle plate on the American Highways. The motors worked pretty good, the only problem was CNG is not regulated per mix of gasses, so where ever the trucks went, they had to send an engineer out, have the cng sampled, then reprogram the ecm to handle the mix
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