what a pita. what size is it anyway?

 

9/16 and you can purchase a special wrench for it at any parts store. I usually move aside the EGR solenoid to make it easier.

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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

 

Ya, on the TPI engines you have to remove the coil with 2 7/16 bolts. It also holds down the EGR solenoid. Get them outta the way and you're good to go.

Don't forget to disconnect the computer advance wire on the pass. side cowl area if your adjusting base timing.



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Mike L.
It ain't pretty.......

1987 IROC Z TPI 350 A4 3.27 Borg-Warner.

Mods: 2300-2500 Stall Converter, Shift Kit(GM parts), TPI Specialties Stage 3 PROM, Modified Airbox w/ K&N's, homemade cold air, Relocated MAT sensor, Gutted MAF, 160* thermostat, Accel 8mm Wires, bypassed TB coolant, Flowmaster 3 chamber single 3" in/out muffler, 3" MAC mandrel intermediate, custom dual !cat Y-pipe. airfoil, ported plenum. !smog

http://www.MichaelLasiuta.home.att.net

**BOYCOTT LAPEER DRAGWAY**

 

I use an extension and a 9/16th or metric equivalant, crows foot wrench. Import sets run about 8 bucks a set at your local HF store.

I have two distributor wrenches, probably not designed for this car, but neither will work because of the coil placement.