You can test the radiator cap with a special hand pump designed for it ...

Or just swap it for one off a Holden ... they are all pretty much the same. I'm partial to 7lb caps (to keep pressure in the old radiators lower) and a 180 degree thermostat to keep pinging away with regular (low octane) fuel.

Okay, here is the update so far. I got my car to the nearest garage and guy told me he found a small leak in the water pump. He said he would replace the pump, thermostat, and do a complete flush to see if it solves the overheating. I am biting my nails at the moment awaiting the phone call because I am afraid I did damage to the head gasket. It should be ready sometime today, but i am anxious for the call!

Don't Stress. $%@ Happens!

Even if it is the head gasket its no huge drama. Probably one of the best little motors to do a head gasket on - nice and easy.

There should be more than enough info on this site and people willing to help you out if it is the head gasket.

Lets just hope its not

yeh ask me i had to change mine four times in about two months after my rebuild long story i'll tell you later in life. lets just say i blocked my oil feed to the rocker shaft.

nicholas

Nicholas that avatar is damed hypnotic and I am becoming obsessed damn it.

Chad
If you are interested in Datsun cars, but don't even know where the thermostat is, then i recomend that before you do any more damage, that you

1. Get yourself one of those Gregory's repair & service manuals. They are not too expensive & are a VERY good investment.

2. READ IT. Then read it again.

3. Follow the instructions to the letter

The cost of the book will be recovered many times over in the damage that you will NOT do as a result of NOT knowing how to find or fix things.

Three simple steps. Get the manual, Read the manual, Obey the manual.
Net result, money saved, greif avoided.
Chris