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Message: [QUOTE="Brad.S.19, post: 1039744, member: 12605"] Thanks I just bought one @ Harbor Freight #93644 diesel rated up to 1000 PSI it is spec'd for navistar 6.9-7.3 IIRC for the correct fitting(s) and I also looked at the compression thread so I will be doing the adapter based off that. The actual plug itself is not very big in size in terms of height. I am not sure if I should be concerned about the clearance of any moving parts. I may have to get some female adapters and 90* bends once I get into it and I did purchase a grease tube rated for 3000 PSI if I need it hope that is enough. Just waiting for this god forsaken heat and humidity to pass tonight then I will dig into it and get the results. I did drive it around today the "knock" was less noticeable at idle then when warm it was gone. Once up to temp I did the oil fill cap again and got completely different results it kept trying to blow it off this time to some extent. I am going to need Injectors deff I hope that is all. [/QUOTE]

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