Head studs
#1
Instructor
Thread Starter
Head studs
Chaps,
Ripping down the 4.7 litre engine. There's a possibility it might get some modest boost in the future (more on that later), although could stay NA.
Do I need to replace the head studs ?
If so, what does a set cost (roughly) ? I need 18 x long and 2 x short, right ?
Thanks !!!
Ripping down the 4.7 litre engine. There's a possibility it might get some modest boost in the future (more on that later), although could stay NA.
Do I need to replace the head studs ?
If so, what does a set cost (roughly) ? I need 18 x long and 2 x short, right ?
Thanks !!!
#2
Hello !!!!!
bon appetit !
https://rennlist.com/forums/928-foru...ead-studs.html
p.s. I did decide to replace mine, and plan to follow the modified tightening procedure described in the last few (most recent) posts of the thread above.... good luck, please post your thoughts/decision if convenient...
cheers
bon appetit !
https://rennlist.com/forums/928-foru...ead-studs.html
p.s. I did decide to replace mine, and plan to follow the modified tightening procedure described in the last few (most recent) posts of the thread above.... good luck, please post your thoughts/decision if convenient...
cheers
#3
Instructor
Thread Starter
I know, and the thread is a nightmare.
I'm looking at Porsche OEM studs. So WTF ??? Do I just torque them down to whatever ft/lb ? Or do some 90 degree thing ?
It's confusing..
I'm looking at Porsche OEM studs. So WTF ??? Do I just torque them down to whatever ft/lb ? Or do some 90 degree thing ?
It's confusing..
#4
Rennlist Member
If they are original, do Porsche's specified angle torquing method. If they are new, torque them to 66 ft/lbs.
Porsche changed the alloy in the studs and they don't stretch as much anymore, so following the angle torquing method with the new studs will result in a torque spec of over 100 ft/lbs. No bueno.
That is the gist of it from the technical (nightmare) thread on this.
Porsche changed the alloy in the studs and they don't stretch as much anymore, so following the angle torquing method with the new studs will result in a torque spec of over 100 ft/lbs. No bueno.
That is the gist of it from the technical (nightmare) thread on this.
#6
Rennlist
Basic Site Sponsor
Basic Site Sponsor
Chaps,
Ripping down the 4.7 litre engine. There's a possibility it might get some modest boost in the future (more on that later), although could stay NA.
Do I need to replace the head studs ?
If so, what does a set cost (roughly) ? I need 18 x long and 2 x short, right ?
Thanks !!!
Ripping down the 4.7 litre engine. There's a possibility it might get some modest boost in the future (more on that later), although could stay NA.
Do I need to replace the head studs ?
If so, what does a set cost (roughly) ? I need 18 x long and 2 x short, right ?
Thanks !!!
If one is corroded, you need to replace all.