YT90SC Posted November 13, 2019 Share Posted November 13, 2019 14 minutes ago, theDuff said: You are correct. Those saw cuts are bad news and Ford knows it. Hopefully they revised it to a drilled bore instead of the saw cut like the 1.5 update. Lots of 1.5 short blocks are being installed because of their sawcut leading to coolant ingestion. It is an issue and a supremely stupid idea. Will it be as big an issue with actual iron? Remains to be seen. However, knowing Ford and one hand not knowing what the other is doing, willing to bet at least the first year's production will be cut rather than drilled and they will only switch when they start replacing shorties. Quote Link to comment Share on other sites More sharing options...
coupe3w Posted November 13, 2019 Share Posted November 13, 2019 Didn't they have those slots on the 2.3 eco-boost also? The Focus RS had(s) head gasket problems also. Quote Link to comment Share on other sites More sharing options...
Stray Kat Posted November 14, 2019 Share Posted November 14, 2019 I don’t think those are water slots in the first place. They look more like gasket registers to me. Let’s have a little faith in Ford, I think they’re gonna get this right. Quote Link to comment Share on other sites More sharing options...
7Mary3 Posted November 14, 2019 Share Posted November 14, 2019 I think the slots are for coolant, they appear to join the coolant passages. But, the 7.3L block is iron, so no reason to think they will be an issue particularly with a standard bore. I brought the slots up just because I see a possibility they could be a limiting factor with a large bore increase. GM uses a siamese cylinder block on the new 6.6L, but they drilled coolant passages between the bores. No exposure to the deck. They have done this on some of the large bore 'crate' Big Blocks. With the 6.6L bore of 103.25 mm and bore spacing of 111.76 mm, they have a bit less space between the bores, but an uninterrupted deck. But seriously, at 445 cubic inches, how much bigger do you want to go? Quote Link to comment Share on other sites More sharing options...
jpd80 Posted November 14, 2019 Share Posted November 14, 2019 (edited) 2 hours ago, theDuff said: You are correct. Those saw cuts are bad news and Ford knows it. Hopefully they revised it to a drilled bore instead of the saw cut like the 1.5 update. Lots of 1.5 short blocks are being installed because of their sawcut leading to coolant ingestion. Unlike the 1.5, the 7.3 has been through exhaustive heavy duty and medium duty truck engine testing with sustained loading like no car engine experiences. Those slots could also serve as gasket registers to seal from cylinder head and used to strengthen gasket sealing at those locations. Edited November 14, 2019 by jpd80 Quote Link to comment Share on other sites More sharing options...
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