bahahahahaha well said DD

Lets hope global warming doesn't push global temps up to what's needed to safely not run a thermostat eh!!!

Why buy a new one? Just test your to ensure it is still in spec. Mine is 35 years old and still working well.

Or, go to a Nissan parts dealer and ask for Part Number 21200-78502 or alternative. Or get one from a 1991 Nissan Trooper, that's a direct replacement for an A12.

-20 or -30 either one will do.

Hi DD

Thanks DD what sort of a thermostat i need to buy,what is the model or part no here it is very difficult to find one,here average temp is 27 C -30 C, if i ask for a thermostat for b210 here most of the auto dealers tell are they have thermostat ?


Thanks
Regards

Yes you can run the engine without a thermostat. But it'll wear out faster.

Unless where you live the ambient outside temperature is close to 100 C, you need a thermostat. Say it is 43C (105F). The engine is not designed to run that cold.

you should run the thermostat as it assists cold start up,

but I dunno how cold it gets in Sri Lanka, might be more beneficial to run thermostat in non tropical climates.

No thermostat might not really be a problem for you.

Hi Guys

here are some disassembled parts of mine for further clarification.My Casting Number is H50
Thanks
regards
Sumith

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The tech wiki section here will tell you about heads.
http://datsun1200.com/modules/mediawi ... e=A-series_Cylinder_Heads

To test your thermostat put in in a pan of water on the stove along with a cooking thermometer. Heat it up and check the temperature at which it opens against its rated temperature.

Your head may be warped. Have it checked and milled flat if necessary.

Hi Guys

Started my work on last week end,seems my head is not good enough for reason always have gasket blown, thinking about replacing the head with another one,do i need to find exactly A12 head or can i find A13 or A14 , in that situation what else i need to replace with A13 or A14 heads,
Other think i am thinking about my thermostat how to bench test it ? ,what do you think if i run without a thermostat ? i heard some guys have removed it completely and running the car smoothly

Thanks
Regards
sumith