Holden Calais Common Problems: What to Do

The Holden Calais is a well-sorted car, but like any ageing platform it has a handful of recurring issues that owners run into sooner or later. Most are manageable with the right knowledge, but a few will strand you if you ignore them long enough.

What Causes It

• Window regulator wear -- the plastic clips and cable mechanism in the door degrade over time, causing windows to travel crooked, bind near the top or bottom, or drop into the door entirely. Extremely common on VT through VZ models.
• PCV system failure -- the positive crankcase ventilation valve and hose deteriorate with age, causing increased oil consumption, rough idle, and blow-by contamination into the intake. The valve is located on the rocker cover; on the LS-series V8 there is a factory boss bolt on the block suitable for catch can mounting.
• CV joint and driveshaft wear -- the inner and outer CV joints cop a beating, especially on higher-kilometre cars. Clicking under load or vibration through the floor means the boots have split and the grease is gone.
• Cooling system degradation -- the plastic end tanks on the radiator crack, water pump impellers corrode on the V6, and the thermostat housing is prone to weeping on the VE platform. Low coolant is often the first symptom owners notice.
• Timing chain stretch -- on the SIDI 3.0L and 3.6L V6 engines in VE and VF models, timing chain rattle on cold start is a known issue. It worsens over time and is expensive if left alone.
• Electrical gremlins -- BCM faults, faulty window switches, and dodgy earth straps are common on VT-VZ. The VE and VF add infotainment and climate control modules to the list.

What to Do Right Now

1. Check the engine oil level and inspect the PCV hose for cracks or oil residue. If the hose is soft and oily, replace it before booking anything else.
2. Test all four windows. If one moves crooked or hesitates, manually guide it straight before operating it again -- running a misaligned regulator will chew through the mechanism fast.
3. Listen for clicking from the front of the car during full-lock turns. If you hear it, inspect the CV boots immediately and plan for a driveshaft replacement.
4. Check the coolant reservoir when the engine is cold. Any brown discolouration or oily film points to a head gasket or cooling system issue that needs proper diagnosis before driving further.

When It's Serious

A timing chain rattle that persists past warm-up is not something to drive on. If the chain jumps a tooth, valve timing goes out and you are looking at bent valves or worse. Pull over, get it on a trailer, and have the chain and tensioner inspected by someone familiar with the LS or SIDI platform.

Any coolant loss combined with white smoke from the exhaust or bubbling in the reservoir means stop driving immediately. The VE V6 in particular is susceptible to head gasket failure once the cooling system is compromised, and continuing to drive will turn a $1,500 repair into a full engine rebuild.