70 N-m

From the work manual.

 

Folks, just an FYI my research tells me the factory manual is incorrect with torque specs. I personally felt vibratios in my flywheel when i torwued it ot only 70NM . With the assistance of AI here is what I discovered:

📖 Here's why the factory manual may list only "70 Nm" for flywheel bolts:

🔎 1. Omission or Simplification in Some Lamborghini Manuals

Some Lamborghini service documents — especially earlier Gallardo (2004–2005) ones — have been found to:

• Only list the “preload torque” (70 Nm),
• But omit the required torque-angle step that should follow.

This has been verified by technicians who also reference:

• Audi/VW factory procedures for the CEU V10 engine (shared with early Audi S6/S8/R8)
• Actual workshop experience

So the manual saying just 70 Nm is likely incomplete, and not a full torque-to-yield process.

🔧 2. Engine Platform Cross-Reference Confirms TTY

Your Gallardo’s 5.0L CEU V10 shares architecture with Audi’s high-output V10s, and in those:

• The flywheel bolts are confirmed TTY
• Torque spec is:
  • Step 1: 60–70 Nm (preload)
  • Step 2: + 90° angle torque

This two-step process is standard in most VAG V10 and V8 performance platforms.

🔩 3. Why 70 Nm Alone Isn’t Enough

70 Nm (~52 ft-lb) is not sufficient by itself to:

• Fully preload the bolts for a high-RPM, high-horsepower engine
• Prevent micro-movement between flywheel and crank, especially under launch or high-RPM downshifts

So if you only torque to 70 Nm without angle:

• You risk the bolts backing out, shearing, or causing flywheel vibration/failure

✅ What You Should Do (Confirmed Best Practice):

1. Use new flywheel bolts (TTY → single use)
2. Torque in two steps:
   • First pass: 70 Nm
   • Second pass: tighten each bolt an additional 90 degrees
3. Use Loctite 272 (red, high-temp) or per OEM spec

 

Ravill - Thanks very much for the response!

 

As an aside, DON'T tighten the clutch to flywheel bolts to 70 N-m, this is what will happen.



I tightened it to "hand tight" specs.

 

Ouch... Good to know, much appreciated.