Cant figure out what it is.... theres a new thermostat, the head was just put on and it has studs, have FAL fan constantly running. only heats up after getting off highway or after a few good pulls... top radiator hose is hot bottom stays cold... idk!!!!

 

Bump. It's lsv built boosted.. Someone help!

 

First question is, are you sure your FAL rad fan is running in the correct direction?

Second, what size is your rad, and how much of it is covered by the intercooler? 94

 

Positive its running the right way. And full size rad.. I have ac. Not much is covered I have spearco IC

 

Ttt

 

Abybody?? Ttt

 

Your radiator is bad.

 

What gives that away? Not doubting just curious

 

Because my first thought was water pump

 

did you not do the water pump when you did the studs?
you use an OE thermostat?

i assume you've bled the system thoroughly?

 

Did failsafe thermostat, bled system, and yes did waterpump

 

pretty sure its the radiator

 

Actually the water pump wasn't done my bad lol. But just pulled radiator out wasn't clogged or anything filled it up no leaks but the thermostat wouldn't open the water was just boiling out like it wasnt moving through the motor..

 

water pump

 

yeah water pump..

 

well picking up a water pump today, let you guys know this weekend if it fixed it lol

 

would i get a 19 or 22 tooth waterpump? b16 head and ls block

 

general rule of thumb is that you get the same water pump as the timing belt, so are you running b16 timing belt or LS one?

 

If the bottom hose is still staying cool, I'd try a new thermostat before tackling the water pump. I realize you just replaced it, but it's possible to get a bum one out of the box.

If the water pump isn't working, hot coolant would be going through the bypass, and which would eventually make its way to the thermostat. Since the thermostat isn't opening (because the hose is cold), I'd rather try a $10 thermostat than going through the hassle of a water pump.

 

could i just take the thermostat out and see what that does?

 

Got to agree with ChristianL replace the thermostat first, it could easily have been a DOA, as mentioned it is cheap and a hell of a lot easier then a water pump to replace, if that does not fix the problem, your out $10-$15 and 15-20 min. of work.

I would never recommend running without a thermostat but it can't hurt to remove it and see what happens. 94

 

I'm just thinking of taking it out just for to see if it heats up

 

Could it be bad hose on bottom?

 

Bad hose?

Unless there is a restriction of some sort in the hose then no, the hose is not the problem.

If coolant is not "circulating" it must be from either a restriction, [including a thermostat that is stuck closed] or a bad water pump.

Over-heating can be caused by a number of things or combination of things, including obviously, coolant not flowing.

You need to confirm coolant is flowing, remove or change the thermostat. 94

 

Will removing it cause it to leak? will it seal without thermostat