Thermostat housing gasket

I think I found the last coolant leak on the engine. The thermostat housing always hisses when the car is turned off. I did unfortunately break a bolt off in the cylinder head!! Luckily I was able to get it out without drilling.

New gasket installed! No more hissing when I turn the car off & no more coolant leaks!

Housing and the (lack of) original gasket

Yes, I broke that bolt off in the head

Glad I had a couple spare bolts laying around

NOS Fuel Pump

So I ran across a NOS electric fuel pump which after investigation appears to be from a Datsun 720 pickup truck.  Its never been used and I'm hoping to sell it to someone with a 720 who can use it for a restore.  Unit number 379-00160, Transistor Fuel Pump is listed on the label.

I was able to power up the pump and it works great.  Also appears that this was used for the '73 240z's that experienced the vapor lock conditions.  After opening the filter lid (right side of picture), I can verify this pump has never been installed!  Another NOS part that I can sell to allow me to purchase some more parts for my restoration.

Vacuum leaks and exhaust pops resolved

I decided to pull off the air pump and associated devices which no longer function due to their age and the fact that we no longer have leaded gasoline.  The popping out of the exhaust has ceased and I am no longer introducing un-metered air into the mixture.  A couple more quick fine tuning and the car will be running perfect!

Back up & running

The carbs have been re-installed into the car and it fired right up.  I've done the gross tuning and now I just need to fine tune the mixture.

New thermostat

While the coolant was drained, I decided to install a new thermostat. Look at the old one I pulled out! I can't imagine what the rest of the cooling system looks like... That is for another day though.