RamboRedRex Posted August 14, 2014 Share Posted August 14, 2014 so I have seen that the ZX studs are "better" since they are a stronger metal (or at least thats what I read in that little manual someone wrote out). has anyone used these studs? my questions are as follows 1. can I just get stock studs for my pathy without them rusting through in 3 weeks? 2. cant I just slap some anti sneeze on the studs to help prevent bulid up in the threads, or do I go the other way and slap some thread locker on them? any thoughts or sugestions Link to comment Share on other sites More sharing options...
stabworthy Posted August 14, 2014 Share Posted August 14, 2014 anti seize and locker wont hold up to the heat, i know i thought the same thought. Link to comment Share on other sites More sharing options...
Goosevf_1 Posted August 14, 2014 Share Posted August 14, 2014 If anti sieze can stand up to the heat of a spark plug, why wouldnt it work for head studs? Link to comment Share on other sites More sharing options...
MY1PATH Posted August 14, 2014 Share Posted August 14, 2014 (edited) Anti seize has a temperature rating of 1600F this is far more than you will see at the threads of any spark plug or exhaust stud.Wanna go overkill? Anti seize copper has a temperature rating of 1800F...Yes, I know the combustion temperature reaches about 4500F but all those gases are constantly moving thus the Manifold runners themselves get hotter (up to 12-1500 in pathfinders, MEASURED) But the studs and flanges dissipate all their heat into the head. Edited August 14, 2014 by MY1PATH 1 Link to comment Share on other sites More sharing options...
nitroman15 Posted August 14, 2014 Share Posted August 14, 2014 so I have seen that the ZX studs are "better" since they are a stronger metal (or at least thats what I read in that little manual someone wrote out). has anyone used these studs? my questions are as follows 1. can I just get stock studs for my pathy without them rusting through in 3 weeks? 2. cant I just slap some anti sneeze on the studs to help prevent bulid up in the threads, or do I go the other way and slap some thread locker on them? any thoughts or sugestions I would get the zx studs. After having to remove several broken stock studs, I wouldn't want to use the stock ones. I have had the zx studs for 5 years and no sign of rust. I have removed my headers several times in the last 5 years to repair cracks and the nuts are easy to remove. Link to comment Share on other sites More sharing options...
RamboRedRex Posted August 14, 2014 Author Share Posted August 14, 2014 I would get the zx studs. After having to remove several broken stock studs, I wouldn't want to use the stock ones. I have had the zx studs for 5 years and no sign of rust. I have removed my headers several times in the last 5 years to repair cracks and the nuts are easy to remove. what year ZX are used Link to comment Share on other sites More sharing options...
nitroman15 Posted August 15, 2014 Share Posted August 15, 2014 I think that they are from a late 80's turbo 300z. I purchased them from here: https://www.4x4parts.com/nissan/exhaust-manifold-bolt-nut-washer-kit-p-4193.html Link to comment Share on other sites More sharing options...
MY1PATH Posted August 15, 2014 Share Posted August 15, 2014 what year ZX are used 84-88 300zx turbo Link to comment Share on other sites More sharing options...
Precise1 Posted August 18, 2014 Share Posted August 18, 2014 The 'stock' studs can break if/when the manifolds warp and due to heat cycle stress/fatigue; not engineered/manufactured well... The 'new stock' studs are the ZX studs if I understand it correctly, I don't believe they even make/sell the original spec Pathy VG30 version any longer. I have fancy headers that are held on with black oxide bolts, 10.9 grade IIRC. So far so good... I never understood the stud fascination, nor what grade they are rated to. B Link to comment Share on other sites More sharing options...
MY1PATH Posted August 20, 2014 Share Posted August 20, 2014 (edited) IIRC the stock pathy studs were 5.8 and the 300zx turbo studs were 8.8.(Or maybe it was 8.8 and 10.9)The 10mm 3.3 studs are the same grade as the 3.0 pathy studs but since they are larger they offer the same or greater strength as the 8mm 300zx studs. I used studs to hold the gasket in place while I slipped the header on but after that I used all 10mm 10.9 JIS Flange head bolts on my "fancy headers".They also come in a 8mm Variation: 459-425Part number guideGrade 10.9 Flange Head. Dorman 459-YXX Y= 4 for M8 x 1.25Y= 5 for M10x1.25XX= Length, 20-40 in 5mm increments XX= Length, 50-70 in 10mm increments Yes, I Freaking Love These Bolts! Edited August 20, 2014 by MY1PATH Link to comment Share on other sites More sharing options...
RamboRedRex Posted August 21, 2014 Author Share Posted August 21, 2014 IIRC the stock pathy studs were 5.8 and the 300zx turbo studs were 8.8.(Or maybe it was 8.8 and 10.9) The 10mm 3.3 studs are the same grade as the 3.0 pathy studs but since they are larger they offer the same or greater strength as the 8mm 300zx studs. I used studs to hold the gasket in place while I slipped the header on but after that I used all 10mm 10.9 JIS Flange head bolts on my "fancy headers". They also come in a 8mm Variation: 459-425 Part number guide Grade 10.9 Flange Head. Dorman 459-YXX Y= 4 for M8 x 1.25 Y= 5 for M10x1.25 XX= Length, 20-40 in 5mm increments XX= Length, 50-70 in 10mm increments Yes, I Freaking Love These Bolts! so these bad boys should work for my stock headers and gasket, thats all im trying to do is fix that leak im not guna get performance headers. oh and thats a cute youngin got in that there picture, congrats Link to comment Share on other sites More sharing options...
MY1PATH Posted August 21, 2014 Share Posted August 21, 2014 (edited) Yes, they work on stock manifolds. The flange head is the size of a regular washer. I still recommend using a washer for expansion characteristics.Thanks on the kid, I don't update my picture often... he's almost 4 now... but we did just have another. Edited August 21, 2014 by MY1PATH 1 Link to comment Share on other sites More sharing options...
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