Bazza Posted September 26, 2007 Report Share Posted September 26, 2007 noticed the use of studs and nuts to hold manifolds on question is why ? why not just bolts my thinking is it may be a case of locating the gaskets and manifolds on confused as the starlet intake manifold uses three of each or is there a more techy answer ?? Quote Link to comment Share on other sites More sharing options...
MacRS200 Posted September 26, 2007 Report Share Posted September 26, 2007 Yup. Never use a bolt in a "blind" hole, reason is the bolt could "bottom" in the hole and the required torque (force) won't be applied to the part being held down. A stud on the other hand may "bottom" in the hole but the nut will keep turning till the required torque is reached, easy really Quote Link to comment Share on other sites More sharing options...
Mat Posted September 26, 2007 Report Share Posted September 26, 2007 its also alot easier to hang a manifold and gasket on a stud, than try and locate a bolt, into a manifold whilst holding it and the gasket Quote Link to comment Share on other sites More sharing options...
Bazza Posted September 27, 2007 Author Report Share Posted September 27, 2007 Yup. Never use a bolt in a "blind" hole, reason is the bolt could "bottom" in the hole and the required torque (force) won't be applied to the part being held down. A stud on the other hand may "bottom" in the hole but the nut will keep turning till the required torque is reached, easy really i see that reasoning but why does the starlet have a combination of both ! Quote Link to comment Share on other sites More sharing options...
Tony Posted September 27, 2007 Report Share Posted September 27, 2007 Yup. Never use a bolt in a "blind" hole, reason is the bolt could "bottom" in the hole and the required torque (force) won't be applied to the part being held down. A stud on the other hand may "bottom" in the hole but the nut will keep turning till the required torque is reached, easy really i see that reasoning but why does the starlet have a combination of both ! Most manifolds will have studs with the correct length thread so that the head is not damaged. Often when you try and remove the nut on the stud, the stud also gets removed. If replacement studs are not available many places with just use bolts instead..... Quote Link to comment Share on other sites More sharing options...
Bazza Posted September 27, 2007 Author Report Share Posted September 27, 2007 Yup. Never use a bolt in a "blind" hole, reason is the bolt could "bottom" in the hole and the required torque (force) won't be applied to the part being held down. A stud on the other hand may "bottom" in the hole but the nut will keep turning till the required torque is reached, easy really i see that reasoning but why does the starlet have a combination of both ! Most manifolds will have studs with the correct length thread so that the head is not damaged. Often when you try and remove the nut on the stud, the stud also gets removed. If replacement studs are not available many places with just use bolts instead..... on the starlet there is definetly a mix of both, now that i have the insulator/spacer fitted the original studs arnt long enough, so i may need to use correctly sized bolts so needed to know if there was a reason why i couldnt Quote Link to comment Share on other sites More sharing options...
Tony Posted September 27, 2007 Report Share Posted September 27, 2007 Yup. Never use a bolt in a "blind" hole, reason is the bolt could "bottom" in the hole and the required torque (force) won't be applied to the part being held down. A stud on the other hand may "bottom" in the hole but the nut will keep turning till the required torque is reached, easy really i see that reasoning but why does the starlet have a combination of both ! Most manifolds will have studs with the correct length thread so that the head is not damaged. Often when you try and remove the nut on the stud, the stud also gets removed. If replacement studs are not available many places with just use bolts instead..... on the starlet there is definetly a mix of both, now that i have the insulator/spacer fitted the original studs arnt long enough, so i may need to use correctly sized bolts so needed to know if there was a reason why i couldnt Just be sure the thread going in the head is no longer than the thread on the studs. Quote Link to comment Share on other sites More sharing options...
w481ggc Posted September 28, 2007 Report Share Posted September 28, 2007 I would always use studs , you can strip a thread on nut or stud and change them , if you over tighten a bolt it will bugger the thread in the block and it will have to be heli-coilled , also the force of torsion will be different when torqued up beteen a bolt and a stud and nut . Quote Link to comment Share on other sites More sharing options...
MacRS200 Posted September 29, 2007 Report Share Posted September 29, 2007 I would always use studs , you can strip a thread on nut or stud and change them , if you over tighten a bolt it will bugger the thread in the block and it will have to be heli-coilled. Very true about changing a stud if you strip the thread but a bolt is no different unless the bolt "bottoms out" in the hole in that case you will strip the thread in the head. also the force of torsion will be different when torqued up beteen a bolt and a stud and nut . Sorry but I don't follow the logic on that one. Quote Link to comment Share on other sites More sharing options...
TDIPLC Posted September 29, 2007 Report Share Posted September 29, 2007 A lot people prefer studs because the torque load is shared between two sets of threads instead of one set of threads which a bolt has. Quote Link to comment Share on other sites More sharing options...
w481ggc Posted September 29, 2007 Report Share Posted September 29, 2007 I've seen a lot of bolts with there head sheared off Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.