Ford Ranger Maintaince And Repair Manual page 465

HOW TO USE THIS BOOK
The 4.0L SOHC engine cylinder heads retain the camshaft using bolt−on bearing caps
Most cylinder heads with rocker arm−type camshaft followers are easily disassembled using a standard valve
spring compressor. However, certain models may not have enough open space around the spring for the
standard tool and may require you to use a C−clamp style compressor tool instead.
Example of the shaft mounted rocker arms on some OHC heads
DISASSEMBLY 459