|
|
|
|
| Author |
|
|
Registered
Join Date: Feb 2005
Location: MELVILLE, NY
Posts: 87
|
Head studs..
How do you know if you have a head stud problem? I hear alot about this. I had a friend with an 88 coupe that had a broken head stud. I remember that the exhaust had a weird sound to it. It also had an aftermarket exhaust on it. But the sound was more like a midrange RPM noise. I thought that it sounded like a bad exhaust. The mechanic told him he had a broken head stud and that 1 was ok...two or more and $$$. What does it cost to fix?
__________________
1982 911sc coupe blk/blk 2004 Mercedes ml350 2003 Nissan Maxima 2005 infiniti g35 coupe 6mt 1980 Maserati Merak-gone-thank god Ferrari 250gt cal spyder replica |
||
02-20-2005, 05:01 AM
|
|
|
Registered
Join Date: Jan 2005
Location: Huntsville, AL
Posts: 79
|
Broke 6 head studs on my 1981 SC (158K miles) that lead to complete rebuild. If there are more than a few broken you will hear a popping sound comming from the exhaust port. Blowby that will damage your cylinders quickly. I ended up replacing two cylinders on mine. Remove the lower valve covers to check the studs. Several half-bolts and nuts were bouncing around when I found mine. It is usually the lower studs that break (dialivar Sp?). SC had non-steel, dialivar studs on the bottom row. Don't know what it would cost to repair in place, all mine were replaced with steel studs during rebuild.
__________________
sjepps 1981SC Targa 2003 996 C2 Cab |
||
|
02-20-2005, 05:25 AM
|
|
|
Registered
Join Date: Feb 2005
Location: MELVILLE, NY
Posts: 87
|
popping noise like back off sound? How common is this problem?
__________________
1982 911sc coupe blk/blk 2004 Mercedes ml350 2003 Nissan Maxima 2005 infiniti g35 coupe 6mt 1980 Maserati Merak-gone-thank god Ferrari 250gt cal spyder replica |
||
|
02-20-2005, 05:27 AM
|
|
|
Licensed User
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,506
|
Remove the lower valve covers and look for loose barrel nuts.
|
||
|
02-20-2005, 05:34 AM
|
|
|
Registered
|
I thought by 1988 all studs were steel and fairly reliable, you may want to pull the upper valve covers also. I think a full top end rebuild would cost 3-5K depending on what you find.
__________________
Walt 82SC 3.0 81SC 3.6 |
||
|
02-20-2005, 05:38 AM
|
|
|
Metal Guru
|
Do a search. You will find a lot on this topic.
Walt, I believe that the later Carrera engines have an epoxy coated Dilivar head stud which is less suseptible to stress corrosion cracking.
__________________
Paul B. '91 964 3.3 Turbo Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, H&R Coilovers, ESB spring plates- 210 lb |
||
|
02-20-2005, 06:02 AM
|
|
|
|
Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
|
As 911nut said......but the bottom row ( 12) is epoxy coated Dilivar....
.....upper 12 are steel...... Wil
__________________
Wil Ferch 85 Carrera ( gone, but not forgotten ) |
||
|
02-20-2005, 02:04 PM
|
|
1991 Porsche 964 Turbo
