View Poll Results: Has your SC broken a head stud?
Multiple Choice Poll. Voters: 24. You may not vote on this poll
Has your SC broken a head stud?
#2
Mine went somewhere between 120,000 and 125,000 miles and 34-35 years. Just one stud on the lower right side (#4 I think) and it fell off in my hand as soon as I opened my valve covers for valve adjustment.
#3
Team Owner
eeny meany miny and Moe .. Moe Money more like it .
The Dilivar Gang are no more in my engine , their reign of tyrany is over !!
Mine did it at 260k km , as Dave mentioned I could hear a metal on metal tapping as I drove. I took valve cover off and it fell into my hand. By the time I got the engine out and on to the stand and rotated, 3 more fell out. All lowers all Dilivar, replaced with steel.
Last edited by theiceman; 05-14-2018 at 05:56 PM.
#6
Team Owner
Its worth pointing out that this is not a catastrophic failure. One breaks. Start budgeting to have the top in end done.
Unlike an IMS failure of a more modern porsche. Immediately take your wallet out to buy a new engine . Or scrap your car
Unlike an IMS failure of a more modern porsche. Immediately take your wallet out to buy a new engine . Or scrap your car
#7
Rennlist Member
The 3.0 and 3.2 all break sooner or later. I won't look at any car that hasn't had studs replaced. The last 2 SC's I owned had new studs. One was an original 55K car. Time, not mileage in this case.
Stress risers on the studs created by corrosion.
Here are some from a '69 Group 3 Porsche factory engine. Every one of them broke. The "covers" held moisture. Moisture = Corrosion. Heat cycling did the rest.
Stress risers on the studs created by corrosion.
Here are some from a '69 Group 3 Porsche factory engine. Every one of them broke. The "covers" held moisture. Moisture = Corrosion. Heat cycling did the rest.
Trending Topics
#8
Drifting
Thread Starter
Interesting results so far, although we only have 17 responses. I find it interesting that even though these cars are now 35 to 40 years old, some cars have not suffered this failure. It may happen to all of them at some point, but some have held up for several decades now. Wonder if mileage, heat/cool cycles/temps and/or moisture have something to do with it?
#9
Rennlist Member
Interesting results so far, although we only have 17 responses. I find it interesting that even though these cars are now 35 to 40 years old, some cars have not suffered this failure. It may happen to all of them at some point, but some have held up for several decades now. Wonder if mileage, heat/cool cycles/temps and/or moisture have something to do with it?
I've seen low mile cars (30K) with broken studs that were kept up quite well. These studs corroded, created stress risers and snapped. No rhyme or reason but until a seller can prove the studs in a car
are replaced I'm not a buyer. It's not a matter of if.
#13
Rennlist Member
Do once and forget about them. All of these engines need a top end by now so it's as good an excuse as any.
#14
Team Owner
Originally Posted by old man neri
I haven't looked much into it but I am assuming proactively replacing them costs just as much time and money as replacing them once one breaks?
#15
Drifting