Rebuild 2.7 Questions

[lbailey75@tampa]

In the process of refreshing my 1977 911 2.7 with 140K. Bearings & journals look and mike great. Rods & crank mike & look great, same with intermediate shaft. The piston liners don't even have a ridge. The valves seat correctly, the guides feel tight.
Questions:
1. Do the rod bolts need to be replaced ?
2. The case has Dilavar head studs. Do the barrel nuts need replacing ?
3. What sealants are used and where ?

Would like to here from some professional rebuilders

Thanks

[Flat6pac]

Back in the day the builder would case save and install dilivar studs. My advice would be to replace the head studs because they may break on the building retorque which consistently happens on 3.0 and turbo motors when the studs aren’t changed out.
On my builds. Use 574 across the board but on magnesium cases centerline I use Yamabond because it’s more filling for centerline defects. Be sure to read the directions.
New head nuts, to what point?
Bruce

[lbailey75@tampa]

Thanks Bruce Rod bolt replacement is a must. Any suggestions on what head studs should be used? It is a stock 2.7 rebuild. Where can Vamabond be purchased? What lube is recommended for the O-rings, shaft seals and crank assembly bearings?

[Flat6pac]

Yamabond and Hondabond are both available from motorcycle shop. Be sure to read the directions
Answers to any other questions PM me
Bruce

[Trackrash]

I would like opinions and clarification on reusing Dilivar head studs.

We are tearing down a 2.7 that was rebuild using the ALL THREADED and painted Dilivar head studs many years ago.

Is it foolish to reuse them?