turbogrill Posted February 7, 2018 Share Posted February 7, 2018 Hi, Does some heads use studs and some bolts for the exhaust and intake manifold? On my old engine (N47/N47) I have two studs for the exhaust manifold and rest bolts. For the new engine I am building (F54/old N47) I have two bolts and rest studs. I am confused.... Quote Link to comment Share on other sites More sharing options...
HuD 91gt Posted February 7, 2018 Share Posted February 7, 2018 Studs are used for the exhaust manifold from the factory. Unsure what factory used for the upper intake, but I do believe bolts were used. Quote Link to comment Share on other sites More sharing options...
Chickenman Posted February 7, 2018 Share Posted February 7, 2018 The factory used a combination of both as Colten noted. On race cars I switched everything out to studs, as we often had the Intake manifolds off and on. Made the install faster, plus less danger of pulling a thread out of the aluminium. Even the thermostat upper housing had studs. This was after a certain Ham fisted friend/crew managed to over tighten and strip the threads out of the lower thermostat housing. Doh!!! I worked at a Nissan dealership Parts Dept so had plenty of access to high grade Nissan studs. In fact I always made sure that we had lots of the " special " hardware like half-shaft bolts and nuts. It was funny, but the local Metro Vancouver Nissan dealers always had the best supply of high grade fasteners in stock . A lot of the Parts and Service staff Road Raced at WestWood. Most of the shops used Bowman fasteners for their " Standard Fastener" shop supply. I always made sure that the Road salesman always loaded us up on nothing less than the Metric equivalent of Grade 8 or better. Quote Link to comment Share on other sites More sharing options...
turbogrill Posted February 8, 2018 Author Share Posted February 8, 2018 On 2/7/2018 at 9:59 AM, HuD 91gt said: Studs are used for the exhaust manifold from the factory. Unsure what factory used for the upper intake, but I do believe bolts were used. Hmm....maybe the bolt was so rusted on the stud so I actually got the stud+bolt out. On 2/7/2018 at 10:56 AM, Chickenman said: The factory used a combination of both as Colten noted. On race cars I switched everything out to studs, as we often had the Intake manifolds off and on. Made the install faster, plus less danger of pulling a thread out of the aluminium. Even the thermostat upper housing had studs. This was after a certain Ham fisted friend/crew managed to over tighten and strip the threads out of the lower thermostat housing. Doh!!! I worked at a Nissan dealership Parts Dept so had plenty of access to high grade Nissan studs. In fact I always made sure that we had lots of the " special " hardware like half-shaft bolts and nuts. It was funny, but the local Metro Vancouver Nissan dealers always had the best supply of high grade fasteners in stock . A lot of the Parts and Service staff Road Raced at WestWood. Most of the shops used Bowman fasteners for their " Standard Fastener" shop supply. I always made sure that the Road salesman always loaded us up on nothing less than the Metric equivalent of Grade 8 or better. Lucky you I am looking at getting Pallnet or Datsun Sprit kit, $40-$60 for some fasteners.... Quote Link to comment Share on other sites More sharing options...
TimZ Posted February 10, 2018 Share Posted February 10, 2018 On 2/8/2018 at 2:15 PM, turbogrill said: Lucky you I am looking at getting Pallnet or Datsun Sprit kit, $40-$60 for some fasteners.... Do you have a local fastener supplier? A quick google search turned this up: http://www.hkfastener.com/ Quote Link to comment Share on other sites More sharing options...
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