Introduction
This guide provides advice on replacing a cylinder head, particularly in older engines that have overheated. It covers aspects like choosing between bare and complete heads, additional components to replace, and head brands.
Problem
Engine overheating, indicated by high temperature, steam, and coolant loss from the radiator overflow. This can indicate a blown head gasket or cracked head, especially in engines with significant mileage.
Solution
Replace the cylinder head with a complete head assembly including valves and camshaft. This avoids the cost and complexity of reconditioning the old valves and sourcing shims for valve clearance adjustment.
REPLACE the cylinder head assembly.
Relevant Parts and Procedures
- Complete Head vs. Bare Head: Opt for a complete head assembly to avoid the hassle of valve grinding and setting valve clearances.
- Timing Belt Kit: Replace the timing belt and tensioner (especially the hydraulic tensioner) as preventative maintenance.
- Thermostat: Check and consider replacing the thermostat.
- Radiator Flush: Thoroughly flush the cooling system, preferably by a radiator specialist using chemicals, to remove deposits that can block the new radiator core. Flushing at home might not be adequate.
- AMC Cylinder Head: AMC heads are reportedly thicker castings. Consider as alternative to OEM Toyota.
- SMS Diesel Spares: SMS Diesel Spares is one supplier of the AMC head.
Additional Considerations
- Cooling System Cleaning: Overheating can deposit scale and gunk in the cooling system. Clean thoroughly to prevent blocking the new radiator core.
- Rings and Bearings: Replacing rings and bearings typically requires removing the engine. Consider this if the engine is already out of the car.
This technical summary was auto-generated based on recovered archives. Do not rely on its factual accuracy. Refer to the original thread. Source: View Original Conversation
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