Overheating

[sexual_sushi]

I don't think its acceptable or necessary that it's overheating, I just think its understandable that a car that is known for running hot from the dealer when it was new, would run hot after 30 years of driving. I'm not saying it can't or shouldn't be fixed .

[sexual_sushi]

And I also agree that for $15 you should replace the thermostat.

I also have a sinlge, unshrouded electric fan and non coated headers on my daily driver and that doesn't overheat. I've personally never really had a problem with the overheating (except for once when the thermostat died). But in some cases people have had to resort to other aftermarket measures to fix overheating problems.

[Timwell]

Mate,

i have had this problem on two different cars for two different reasons.

First car was an easy fix, just remove the thermostat...its so obvious that it makes you cry in frustration...this was mentioned earlier.


Second one is way trickier. It happend to my last Z so hold on here  it is.......

Car ran hot and I couldn't work it out....then by chance due to a leaky water pump I stumbled across the problem.

The aluminium timing cover (the one at the front not the rocker cover) had developed a hole between two water jackets that lay inside the water pump.

So effectively when the pump pumped it heart out all it did was either bypass the engine/radiator or it made it so inefficient that it didint do its job.

If its not a hole its a blockage in one of the cores.

good luck.

[Quandary]

Much thanks to all.  I've taken advice from everyone here thus far.  Still a work in progress mostly due to my time constraints and that I only ever see my Z on the weekends.

The A/C unit is out.  And currently testing a few different brand thermostats.  It's down to around 90 degrees.  My aim is lower than this but I'm pleased with the difference already.

Other things on my to do list is to remove that A/C radiator thing and other minor A/C components.  Unfortunately don't have the gear to even make a simple bracket for an electric fan and have yet to find someone that will do this.  Lastly I'll look into the coating for the exhaust header, as am hoping for a L28 swap.