Tired of junk thermostats. Going with NOS. Do I need to drill a hole in in?

[toolmanmike]

All this talk about drilling a hole. I have done many thermostat's (including several Slants) and never had a problem. Just did one about a week ago on my 360 and no issues???

Exactly. 90% of the time there is no issue. The first time firing a newly rebuild can get some air pockets. Just changing out stats isn't an issue.

 

[RustyRatRod]

All this talk about drilling a hole. I have done many thermostat's (including several Slants) and never had a problem. Just did one about a week ago on my 360 and no issues???

Most times you don't. There's always one. lol

 

[RustyRatRod]

Exactly. 90% of the time there is no issue. The first time firing a newly rebuild can get some air pockets. Just changing out stats isn't an issue.

Yup. That's always the time it might happen. When the cooling system is SLAM empty.

 

[Ragmanx]

This summer my '64 Dart slant six was over heating on hot days. The local radiator shop suggested to get the radiator cleaned and rodded. I decided to wait until winter because he was very busy. He is a good radiator guy and has worked on a few of my old cars over the years.

I fooled around with it during the Summer. I ran some cleaner for about 500 miles and had it back flushed. Things improved a lot but the engine tempo was varing alot. I bought and installed a new 180 thermostat, with the the erratic results. I pulled that termo and bought and installed a more expensive one. No change.

I'm kind of hardheaded, and installed a FlowKooler Robertshaw 180 330 series thermo.

Bingo!

Thermo guage right on. To make sure, I used my laser temp. reader on the radiator top and btm hose connectors and readings showed the raditor seems to be cooling the water as it should.

Around 170 going in and 145 to the engine.

I'm forced to conclude that 2 new thermostats were defective and the Robershaw worked as it should.

Has anyone else experienced disappointment with junk thermostats?
Any good results with the Robertshaw FlowKooler?

I'll see if these good results continue when hot weather arrives next summer and post results.

Steve

 

[toolmanmike]

This summer my '64 Dart slant six was over heating on hot days. The local radiator shop suggested to get the radiator cleaned and rodded. I decided to wait until winter because he was very busy. He is a good radiator guy and has worked on a few of my old cars over the years.

I fooled around with it during the Summer. I ran some cleaner for about 500 miles and had it back flushed. Things improved a lot but the engine tempo was varing alot. I bought and installed a new 180 thermostat, with the the erratic results. I pulled that termo and bought and installed a more expensive one. No change.

I'm kind of hardheaded, and installed a FlowKooler Robertshaw 180 330 series thermo.

Bingo!

Thermo guage right on. To make sure, I used my laser temp. reader on the radiator top and btm hose connectors and readings showed the raditor seems to be cooling the water as it should.

Around 170 going in and 145 to the engine.

I'm forced to conclude that 2 new thermostats were defective and the Robershaw worked as it should.

Has anyone else experienced disappointment with junk thermostats?
Any good results with the Robertshaw FlowKooler?

I'll see if these good results continue when hot weather arrives next summer and post results.

Steve

Like stated previously, test everyone in a pot of water on the stove with a thermometer before installing.