Topic: SBC 400 Engines
in Forum: C3 Engines

Lifetime Member #116
Dave's '82



Check out these Head Stud Installation Tips prior to installation!
- All hardware should be cleaned and inspected for possible shipping damage prior to installation.
- Since most studs extend into the water jacket, coat threads with ARP thread sealer and screw in hand tight ONLY.
- Install gasket and head, then lubricate washers and nuts with oil or ARP moly assembly lubricant prior to their installation.
- Following the engine manufacturer's torque pattern, torque each stud nut three times to recommended values found in the general fastener chart below.
NOTE: To ensure positive sealing of "wet" head studs, a hardening or semi-hardening sealant, such as Loc-Tite or Permatex, etc. should be used. Some engine builders employ a sealer in the coolant, such as Aluma-Seal, Silver Seal or K&W sealer, etc. You may also use high temperature RTV silicone. Whatever product is used, it is imperative that the cylinder head is installed and torqued to proper levels BEFORE THE SEALANT HAS CURED!
|
Torque w/30-Wt Oil |
Torque w/ARP Moly-Lube |
1/4in. stud |
12-15 |
10-12 |
5/16in. stud |
25-32 |
20-25 |
3/8in. stud |
45-56 |
35-44 |
7/16in. stud |
71-89 |
56-70 |
1/2in. stud |
108-135 |
84-105 |
9/16in. stud |
156-195 |
122-152 |
5/8in. stud |
214-268 |
167-208 |
6mm stud |
10 |
9 |
8mm stud |
25-32 |
20-25 |
10mm stud |
54-68 |
42-53 |
11mm stud |
80-100 |
63-79 |
12mm stud |
97-122 |
77-96 |

Any recommendations on the best sealer to use in this situation?
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