Head studs on C4, will I be able to remove them?
Thread Starter
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Head studs on C4, will I be able to remove them?
I have a C4, I picked up some head studs and been doing some pre fitting/checking, there is no way I can slide the passenger side head on the studs with the AC housing there.
So it looks like they have to go on after the heads in place.
These studs have a allen head fitting sunk in on the end of the stud to remove them, or so I guess thats why they are there. Will this be enough to pull the head studs out after installing them to 65-70 ft pounds?
So it looks like they have to go on after the heads in place.
These studs have a allen head fitting sunk in on the end of the stud to remove them, or so I guess thats why they are there. Will this be enough to pull the head studs out after installing them to 65-70 ft pounds?
Drifting
Joined: Dec 1999
Posts: 1,319
Likes: 2
From: Douglasville GA
Re: Head studs on C4, will I be able to remove them? (bill mcdonald)
Head studs are not torqued into the block. They are installed finger tight. The nuts are torqued down, which stretches the studs. Each nut needs to move freely on the studs, IE, no galling.
And remember, you will need sealant on the studs in the normal places...
So will you be able to remove them - you shold be able to. How much longer than the original bolts are the studs? If less than an inch longer, I see no reason why you cannot remove the studs, just like bolts.
Tom Melton
82 CE
86 Z51 Coupe
And remember, you will need sealant on the studs in the normal places...
So will you be able to remove them - you shold be able to. How much longer than the original bolts are the studs? If less than an inch longer, I see no reason why you cannot remove the studs, just like bolts.
Tom Melton
82 CE
86 Z51 Coupe
Burning Brakes
Joined: Apr 2001
Posts: 1,209
Likes: 0
From: Toronto Ontario
St. Jude Donor '13
Re: Head studs on C4, will I be able to remove them? (bill mcdonald)
Bill,
You can use the head studs if you install the motor complete. I did on my ZZ4 when it when it. However, later down the road, the heads needed to come off and I was unable to remove the studs. You cannot use two nuts due to the limeted room in the head. AND you are correct, there is not enough room on either side to simply slide the head up and off the studs.
I just replaced the studs with some ARP bolts after that fiasco. As far as you studs with allen head in them, i don't see why you can't use them. The head would have to go on first then thread them in hand tight. I suppose those allen head bosses are there to remove them later, because once the head is on, there is not anything on the stud to catch onto. SO the Allen head would be great for later removal especially in the C4 where the head has to go on first then put the studs in. BUT REMEMBER the studs initially are only hand tightened.
Good Luck,
Victor
You can use the head studs if you install the motor complete. I did on my ZZ4 when it when it. However, later down the road, the heads needed to come off and I was unable to remove the studs. You cannot use two nuts due to the limeted room in the head. AND you are correct, there is not enough room on either side to simply slide the head up and off the studs.
I just replaced the studs with some ARP bolts after that fiasco. As far as you studs with allen head in them, i don't see why you can't use them. The head would have to go on first then thread them in hand tight. I suppose those allen head bosses are there to remove them later, because once the head is on, there is not anything on the stud to catch onto. SO the Allen head would be great for later removal especially in the C4 where the head has to go on first then put the studs in. BUT REMEMBER the studs initially are only hand tightened.
Good Luck,
Victor
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Re: Head studs on C4, will I be able to remove them? (bill mcdonald)
You are totally correct... You WILL NOT be able to remove the passenger side head with the studs. Been there done that! However just do what I do...Pull the 4 interfering ones out when you need to remove the heads. Other have suggested using 4 ARP bolts here as well, but I have a problem with possible clamping discrepancies between studs and bolts...
-Jeb Burnett
-Jeb Burnett
