Just replaced water pump and 160* thermostat.

Idled for about 10 minutes maybe and started puking from overflow.

top of radiator at 234*
upper radiator hose at 210*
T Stat housing was around 200*
front of cylinder heads 195*
lower hose at 90*
water pump housing about 160*

I believe pump is pumping because I kept radiator cap off when I first started it out water was surging out.

Thanks

 

Well the system depressurized quickly so I took the radiator cap off and I believe the radiator is dry.
So i'm thinking maybe thermostat opened and sucked all the fluid into the block And that made the system low on fluid and caused it to overheat.

I will let everything cool down.Refill it and try again

 

Yep, that will happen. It takes a while to purge the air and ensure the system is full.

 

Agree w/ Kenneth. I'll bet you placed the radiator cap on the radiator shortly after you replaced the H20 pump + thermostat. If you were doing a quick visual to see if coolant was flowing then put the radiator cap on during this initial period it doesn't allow enough time for coolant to flow completely & purge all the air. I like to let it run w/ no radiator cap for maybe 10 minutes to 15 minutes watching the fluid go down (while it purges air), continually pour coolant into the radiator during this time period to keep the radiator full - then.....install the radiator cap. Sometimes you might need to to this a couple times.

 

Sorry for your surprise. Hopefully not painful.

I usually bench test new thermostats in a pot of water and a meat thermometer. Doesn’t win me any friends in the kitchen, but at least I confirm T’stats work before they go in.

Having said that, I’ve never had a bad one (i.e. failed before install), but the opening temps do vary as much as the urban legends claim. If I remember they can vary 10 degrees or so high/low of the value stamped on the thermostats.

Chris

 

Yeah I don't know what I was thinking.
In a hurry to check everything before I had to leave and didn't think it through.

Hopefully didn't hurt anything.

 

Nah. Didn't hurt a thing. Like indigestion....burping & farting a couple minutes you're good.

 

Came home top off radiator, ran it until thermostat opened and topped it off again.

Thankfully my bone head move didn't hurt anything.