1969 Mustang Coupe, inline 6. I had to order a new thermostat housing but I also ordered a thermostat for it at the same time since it also needed to be replaced. I purchased a 195 degree one, but started thinking, is that too high, or will it hurt the car in any form? It wasn't like I blindly bought the 195 degree one, because it was listed on CJ Pony Parts with the housing.

Any problems, or should I get a lower one, like a 180 or 185?

 

i think the stock one is about 180? im not sure, but you should be fine with what you have. these older engines run better when they are warmer as opposed to cold. what size radiator do you have? still have the stock water pump? these will play a big role too if your car gets too hot.

 

nope, the radiator was bad and leaked when I went to fill her up, so I have a new radiator, and I figured while I was at it, I'd do the water pump as well.

So, there's a new:

thermostat housing
thermostat
waterpump
radiator
new hoses

 

yeah you should be ok then, with a nice flowing radiator / water pump the temp gauge most likely wont go past half

 

good news to hear.

I hope she starts soon. I need to put the new starter on, hook the hoses up, add coolant, (maybe a new battery) and fire her up.

 

With a good radiator and water pump you should be just fine!![8D]

 

i had a new radiator and i was running a 195 degree thermostat it ran at about 205' which isnt bad instead i went to a 180' so that would be putme at about 190 just letting ya know you what you can get away with.