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Macht Schnell
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
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Wayne- Re-torqueing 930 Heads
Hello,
I am coming up to the 600 mile mark on my rebuild on my '85 930. What is the correct procedure for re-torqueing the heads, and is it necessary? Do you back them all off a half a turn and re-torque, or just check the torque value without backing them off? I have ARP head studs and nutz. Les '85 930 |
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Author of "101 Projects"
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Did you use the anti-seize with them? If not, then any torque values will be suspect, as they will be a dry torque. Still, I would recommend torquing them up again. Don't back them up - just make sure that they are tight. Note - this is a highly debatable and subjective issue. When breaking in an engine, everything will tend to seat and set, possibly creating some looseness, especially on the magnesium motors. The last SC motor I rebuilt didn't need any turns after 1000 miles...
-Wayne
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Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of: 101 Projects for Your BMW 3-Series • 101 Projects for Your Porsche 911 • How to Rebuild & Modify Porsche 911 Engines • 101 Projects for Your Porsche Boxster & Cayman • 101 Projects for Your Porsche 996 / 997 • SPEED READ: Porsche 911 Check out our new site: Dempsey Motorsports |
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Macht Schnell
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
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I used ARP head studs and their moly type lube that comes with them.
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Banned
Join Date: Feb 2003
Location: So California
Posts: 3,787
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THe only moters that require retorqueing, say so in the mfg recommendations. This is due to head gasket considerations, nothing else. With a Porsche, no retorque is required, as far as I know. Thats because of the solid head gasket design, ie a copper gasket. If you do retorque them nothing will be lost. I would NOT suggest loostening them first. Just check them if you must. These type of gaskets are usually ment for ONE time use, that is DO NOT loosten them.
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Author of "101 Projects"
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Jack, you will find on the mag cases that the heads typically will take a few turns of the head studs...
-Wayne
__________________
Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of: 101 Projects for Your BMW 3-Series • 101 Projects for Your Porsche 911 • How to Rebuild & Modify Porsche 911 Engines • 101 Projects for Your Porsche Boxster & Cayman • 101 Projects for Your Porsche 996 / 997 • SPEED READ: Porsche 911 Check out our new site: Dempsey Motorsports |
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Macht Schnell
Join Date: Jun 2003
Location: PSL, FL
Posts: 861
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Hello Guys,
Thanx for the feedback! Les |
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