VB VC VH VK Commodore Repair Manual
When Holden released the VB in 1978, it was a massive shift away from the big Kingswoods Australians had known for years. The VB was smaller, more European in feel, and heavily based on Opel engineering from Germany. Some buyers loved it immediately. Others weren’t convinced Holden should build a car that felt so different from the traditional Aussie formula.
Fast forward to today, and the VB has become a genuine Australian classic.
Clean examples are getting harder to find, values are climbing steadily, and the surviving cars now live very different lives compared to when they were cheap used sedans in the ’90s.
Here are the most common VB Commodore problems owners and buyers should know about.
1. Rust Problems
Rust is unquestionably the biggest issue facing VB Commodores today.
Early Commodores were never famous for strong rust protection, and decades of Australian heat, rain and coastal air have destroyed countless cars. Finding a genuinely solid VB shell is becoming increasingly difficult.
Common rust areas include:
- lower doors
- rear quarter panels
- window surrounds
- boot floors
- chassis rails
- plenum chambers
Many surviving cars have already been repaired multiple times over the years, often with questionable workmanship hiding underneath paint and filler.
Common symptoms
- Bubbling paint
- Water leaks
- Rust around windscreens
- Soft floor pans
- Cracked filler repairs
A rust-free shell is worth paying extra for because proper rust restoration can become incredibly expensive.
Related guide
- VB, VC, VH Commodore Rust Problems
- How to Inspect an Early Commodore Before Buying
- Best Rust Prevention Products for Classic Commodores
2. Holden Red & Blue Motor Problems
Most VB Commodores were fitted with Holden’s famous straight-six engines, including the Red Motor and later Blue Motor variants.
These engines are simple, durable and easy to work on, but after nearly five decades they inevitably develop wear-related problems.
Common issues include:
- oil leaks
- overheating
- carburettor tuning problems
- worn timing chains
- fuel delivery issues
Cars that sit unused for long periods often develop fuel system problems surprisingly quickly.
Common symptoms
- Rough idle
- Hard starting
- Poor fuel economy
- Oil leaks
- Hesitation under acceleration
The good news is that parts availability for these engines is still relatively strong.
Related guide
- Red Motor Problems
- 253 and 308 engine issues
- Best Engine Oils for Classic Holden Engines
3. Cooling System Problems
Cooling systems are one of the biggest weak points on ageing VB Commodores.
Radiators clog internally, hoses perish and water pumps wear out after decades of use. Overheating can quickly damage old Holden engines, especially during Australian summers.
Many surviving VBs are still running very old cooling system components.
Common symptoms
- Overheating
- Coolant leaks
- Steam from engine bay
- Sweet coolant smell
- Heater problems
Preventative cooling system maintenance is one of the smartest things you can do on a classic Holden.
Related guide
- VB, VC, VH, VK Commodore Cooling System Problems
- VB, VC, VH, VK Radiator Replacement Guide
- Best Coolants for Old Commodore Engines
4. Automatic Transmission Wear
The automatic transmissions fitted to VB Commodores were reasonably tough in their day, but time eventually catches up with everything.
Many cars spent years:
- towing trailers
- sitting in traffic
- getting modified
- running without proper servicing
As a result, transmission wear is now extremely common.
Common symptoms
- Slipping gears
- Delayed shifting
- Harsh gear changes
- Transmission fluid leaks
- Shuddering under acceleration
Manual conversions are popular among enthusiasts today, especially in V8-powered builds.
Related guide
- VB, VC, VH Commodore Transmission Problems
- Trimatic Common Issues
- Best Transmission Fluids for Classic Commodores
5. Suspension & Steering Wear
The VB Commodore still has that classic old-school Holden driving feel, but worn suspension can make them feel loose and vague on modern roads.
After nearly 50 years, most surviving VBs now have worn:
- control arm bushes
- steering joints
- sway bar links
- shock absorbers
Lowered cars and old street machine builds are often worse again.
Common symptoms
- Wandering steering
- Clunking noises
- Uneven tyre wear
- Steering vibration
- Poor ride quality
A proper suspension rebuild can completely transform how a VB drives.
Related guide
- VB, VC, VH Commodore Suspension Problems
- Best Suspension Upgrades for VB, VC, VH Commodores
- VB, VC, VH Commodore Lowering Guide
6. Electrical Problems
Old Holden electrics always come with surprises.
VB Commodores are now old enough that wiring looms, connectors and switches become increasingly fragile. Add decades of aftermarket stereos, alarms and backyard modifications, and electrical gremlins become almost guaranteed.
Common electrical issues include:
- faulty dashboard lights
- intermittent starting problems
- charging system faults
- blown fuses
- poor earth connections
Common symptoms
- Flickering lights
- Flat batteries
- Gauges behaving strangely
- Random electrical failures
- Starting issues
Many strange electrical problems eventually trace back to poor grounding or brittle wiring.
Related guide
- Early Commodore Electrical Problems
- Early Commodore Starting Problems Guide
- Best Battery Upgrades for Early Commodores
7. Oil Leaks
If an old Holden isn’t leaking oil, most enthusiasts assume there’s probably no oil left in it.
VB Commodores commonly develop leaks from ageing seals and gaskets after decades of use.
Common leak areas include:
- rocker cover gaskets
- sump gaskets
- rear main seals
- timing cover seals
Common symptoms
- Oil spots underneath the car
- Burning oil smell
- Dirty engine bay
- Smoke near exhaust components
Small leaks are extremely common, but large leaks should never be ignored.
Related guide
- Red engine Oil Leak Guide
- Common Holden Red Six-Cylinder Problems
- Best Oils for Classic Holden Engines
8. Interior Wear & Trim Damage
VB interiors rarely survive untouched after nearly five decades in the Australian sun.
Dashboards crack, plastics become brittle, roof linings sag and seat trims wear heavily over time.
Finding good original interior parts is becoming increasingly difficult and expensive.
Common symptoms
- Cracked dashboards
- Sagging roof lining
- Loose trim pieces
- Interior rattles
- Sun-damaged plastics
A tidy original interior can massively improve both the value and appeal of a VB today.
Related guide
- Early Commodore Interior Restoration Guide
- Early Commodore Roof Lining Repair Guide
- Best Interior Products for Early Commodores
Is the VB Commodore Reliable?
For a car approaching 50 years old, the VB Commodore is still remarkably durable when maintained properly.
The mechanicals are simple, parts support remains decent and most common problems are now very well known.
VB VC VH VK Commodore Repair Manual