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Cylinder studs - Dilivar or gray steel?

What's a good reliable choice for cylinder studs for rebuilding a 3.2? (I don't want the expense of Raceware and I don't plan on tubocharging)
Divilar or standard gray steel?

Old 01-29-2004, 06:17 PM
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Steel

Edit - I guess I should elaborate - dilivar has better thermal expansion properties, but is prone to corrosion. This may or may not be a concern, depending on how long you keep the car.

When I was rebuilding my 930 engine, I replaced the dilivar with OEM steel. No problems.

Your Carrera, I believe, has 12 steel and 12 dilivar. Someone correct me if I'm wrong. It would be OK to replace just the 12 dilivar.
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993

Last edited by cowtown; 01-29-2004 at 06:29 PM..
Old 01-29-2004, 06:20 PM
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Good question. I'm about to replace all of mine.
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Old 01-29-2004, 08:30 PM
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Wayne and John Walker both recommended I go with steel uppers and lowers on my 3.2 so that is what I did.
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Old 01-30-2004, 06:12 AM
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993 Studs... Steel ones. Cheap and reliable.
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Old 01-30-2004, 06:58 AM
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I followed John Walkers advice on my 3.0 too. Steels on the bottom. Same part number as the ones used on the intake side.
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Old 01-30-2004, 08:54 AM
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OK, standard steel looks like the ticket. Wait a minute, I remember VW's needed something called case-saver inserts to handle the additional pulling forces on the studs. Since the steel studs will not lengthen like the OEM Dilivars when hot would case savers be a good idea and are they available?
Thanks!

Last edited by movin; 02-01-2004 at 02:55 PM..
Old 01-30-2004, 09:16 AM
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3.2's DO come with 12 steel and 12 Dilivar..

Save some $ and replace only the 12 Dilivar with steel...factory / ARP / or Raceware....

--Wil Ferch
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Old 01-30-2004, 09:54 AM
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Quote:
Originally posted by cstreit
993 Studs... Steel ones. Cheap and reliable.
Chris, Are those the all threaded ones??

Ingo
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Old 01-30-2004, 09:59 AM
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No offense intended, but a set of Raceware studs is relatively inexpensive insurance when compared to the hassle of having to remove a broken one.

When building racing or street engines (including V-8's in the past), I have always used either ARP of Raceware and have never had a broken fastener.


Lindy

Last edited by Lindy; 01-30-2004 at 11:17 AM..
Old 01-30-2004, 11:12 AM
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I've never heard of a broken steel stud on a street driven 3.2!
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Old 01-30-2004, 11:14 AM
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OK, standard steel looks like the ticket. Wait a minute, I remember VW's needed something called case-saver inserts to handle the additional pulling forces on the studs. Since the steel studs will not lengthen like the OEM Dilivars when hot would case savers be a good idea and are they available?
Thanks!
Old 02-01-2004, 02:57 PM
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Casesavers/Timeserts are commonly used on the magnesium cases, but not so much on the aluminum cases (like yours).

I just cleaned up the threads with a tap and then installed the steel studs on my 930 engine (with red Loctite).
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Old 02-01-2004, 03:05 PM
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what is the best to go with on a 2.7 with a turbo on it? i have the black coated dilivars but the coating is comming off? im a wd for arp but i was told not to use those on mag cases?
Old 02-01-2004, 08:46 PM
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Birel:
Probably steel in combination with Time-Certs...

Turbo 2.7 ? ... yeow !!

---Wil Ferch
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Old 02-02-2004, 06:09 AM
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About cleaning the threads: Are you folks using a bottom tap? If so, how are you removing any swarf at the bottom of the threaded section?

John

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Old 02-02-2004, 07:12 AM
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