1. Verify the Oil Supply System is Otherwise Intact:
* Oil Level: Check your oil level. A low oil level will obviously starve the engine of oil, regardless of the head gasket.
* Oil Pump: Make sure the oil pump is functioning correctly. This requires more in-depth diagnostics, possibly involving checking pump pressure.
* Oil Filter: Ensure the oil filter is properly installed and not clogged.
* Oil Passages: It's *extremely unlikely*, but a blockage in the oil passages could also be the culprit. This would require a very deep investigation and usually involves disassembly.
2. Investigate the Head Gasket Installation:
If the oil system seems fine, focus on the head gasket:
* Oil Gallery Alignment: The head gasket has passages for oil to flow. If the gasket is installed incorrectly, these passages might be blocked, preventing oil from reaching the camshaft. This is the *most likely* culprit if oil pressure elsewhere seems okay. Carefully examine the gasket's surface and compare it to the engine block and head to ensure all oil passages align correctly. Use a diagram of the gasket and engine.
* Gasket Damage: Inspect the gasket for any damage during the installation process. A tear or a misalignment could cause a leak or block an oil passage.
* Torque Sequence & Spec: Did you follow the correct torque sequence and specifications for tightening the head bolts? Incorrect tightening can warp the head or damage the gasket.
* Visual Inspection: Carefully inspect the area around the camshaft for any signs of oil leaks or missing seals.
3. Further Diagnostics:
If you've ruled out other causes, consider:
* Oil Pressure Test: Use an oil pressure gauge to measure the actual oil pressure. Low pressure indicates a problem within the oil system.
* Leak-Down Test: This test pressurizes the cylinders to check for leaks past the head gasket, rings, or valves. While it won't directly show oil passage blockage, it can help pinpoint problems around the head gasket.
Important Note: Working on an engine is complex. If you're not experienced with engine repair, it's best to seek help from a qualified mechanic. Incorrectly installed head gaskets can cause significant engine damage. Trying to diagnose and fix this without the proper knowledge and tools can lead to further complications and costly repairs.
