Daniel

Mike,I don't know about flywheel bolts.The reason I use teflon tape on thermo bolt is that a steel bolt and aluminmum hole cause a chemical reaction that is similiar to welding.This is due to dissimiliar metals.The teflon acts as an insulator.I'm not sure why the thermo housing is the worst,maybe the extra hot and cool of the collant adds to the problem.It seems a Z car right of passage.Everyone fights that demon at least once.Along with vapor lock,dim lights at idle and exhaust smell getting into the car when you let off the gas.All common demons to overcome.

make sure to use teflon tape on the bolts on your head and thermo. housing and you won,t have to fight that battle again next time.

If you put teflon tape on those bolts you won't have to suffer that grief next time.

No more calls we have a winner!! Yeah Mark If that thing won't dim you don't know what position it was in when it broke.I would wire around it.Then you know you are getting full voltage.I have never had a use for that dimmer in any of my Z's.The other info. I gave can then be tried for maximum results.

Mark,Also make sure your dimmer knob at the dash bottom under tach.is turned up fully.Sometimes the simple things will drive ya' nuts! Daniel

Mark,As I say the dim is "normal'.Lets discuss a couple of things in hopes of a cure.The first is if your battery is staying charged,cranks strong you haven't got alt. or battery problems.The coil is what fires your spark plugs.It has nothing to do with lights.Thebulbsat are in your car are most likely 71 models as well.As the lamp burns the filament burns up.The black stuff you see at the ends of a flouresent tube is burnt filament.Even though the light burns the filament has grown weak and deposited the burnt filament to the inside of the glass envelope.In your case that is almost like putting sunglass lenses on you bulbs.I think new bulbs will make your dash problem less severe.Oh yeah I was told once that those were I think 6watt bulbs and you could replace them with8watt.So i was told.

The dim lights are"normal" for 240's. I've had 4 they all did it .The voltage regulator can be tweeked to solve the problem,but only by someone who understands auto electrics.Severe damage can occur if this is not done correctly!