What years does this spark plug wire routing diagram cover?

The document is labeled '1987-93 VEHICLES.'

What clearance is required at the #7 spark plug boot?

The note states the #7 spark plug boot and wire seal area, as circled, must maintain 3/4 inch clearance to the oil level indicator tube and bracket.

What part designations are shown for the spark plug wiring assemblies?

-12281- for the left-hand (L.H.) spark plug wiring assembly and -12280- for the right-hand (R.H.) spark plug wiring assembly.

Which cylinders are on each side of the engine in this diagram?

Cylinders #5, #6, #7, and #8 are on the left-hand rocker arm cover; cylinders #1, #2, #3, and #4 are on the right-hand rocker arm cover.

How are the spark plug wires retained on the valve covers?

The wires are routed through separators and secured to T-studs on both the left-hand and right-hand rocker arm cover assemblies.

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1987-93 Ford Spark Plug Wire Routing Diagram - V8 Valve Cover Separators

Spark plug wiring routing diagram over rocker arm covers for 1987-93 vehicles

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Manual figure showing left and right spark plug wiring assemblies, separators, and routing over the rocker arm covers.

AI caption March 2006 · Photo 158 of 188

This document is a factory-style illustration page covering 1987-93 vehicles, showing the correct routing of the spark plug ignition wires over the left-hand and right-hand rocker arm (valve) covers of a V8 engine. The top diagram shows the left-hand spark plug wiring assembly (part designation -12281-) routed across the L.H. rocker arm cover with cylinders #5, #6, #7, and #8, using a T-stud and wire separators to hold the wires in place. A note highlights that the #7 spark plug boot and wire seal area (circled in the drawing) must maintain 3/4 inch clearance to the oil level indicator (dipstick) tube and bracket. The bottom diagram shows the right-hand spark plug wiring assembly (part designation -12280-) routed across the R.H. rocker arm cover with cylinders #1, #2, #3, and #4, again retained by separators and a T-stud, with 'VIEW A' and 'FRONT OF ENGINE' orientation arrows. The drawing carries reference number 94A52225. A reader can use this page to correctly route and secure spark plug wires by cylinder number and to verify separator/T-stud placement on both banks.

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Frequently asked questions

What years does this spark plug wire routing diagram cover?: The document is labeled '1987-93 VEHICLES.'
What clearance is required at the #7 spark plug boot?: The note states the #7 spark plug boot and wire seal area, as circled, must maintain 3/4 inch clearance to the oil level indicator tube and bracket.
What part designations are shown for the spark plug wiring assemblies?: -12281- for the left-hand (L.H.) spark plug wiring assembly and -12280- for the right-hand (R.H.) spark plug wiring assembly.
Which cylinders are on each side of the engine in this diagram?: Cylinders #5, #6, #7, and #8 are on the left-hand rocker arm cover; cylinders #1, #2, #3, and #4 are on the right-hand rocker arm cover.
How are the spark plug wires retained on the valve covers?: The wires are routed through separators and secured to T-studs on both the left-hand and right-hand rocker arm cover assemblies.