I have a 1984 z-28 H.O I have a carbrated 350. I have resently put a summit aluminum radiator new water pump and new thermostat. i have tried to change the themostat 3 different times. the coolant isnt circulating. i have no heater core. and I can take the plugs out on top of the intake with the motor running and it pumps real good Like a 3ft stream so i know the pump is doing its thing.

 

removed heater hoses is probably the problem,without
the coolant circulating past the thermostat,it will not
open until coolant gets REAL hot-put in a bypass hose
and thermostat should work normally,drilling a hole
(about 1/4")in the thermostat flange so some coolant
can circulate past and heat the thermostat might work
too.

 

Ok I will try drilling the themostat, what do you mean by bypass hose.

 

does he mean like a hose running from the top the water to the intake where the heater hose goes?

 

did u cap off ur heater hose lines or loop them together

 

they are plugged with brass plugs on the in intake the heater core is gone. I removed the whole box and mounted a piece on aluminum with my ignition box on top.

 

"bypass" is basicly a hose from the small fitting on the
water pump to one of the fittings on the front of the
intake manifold(the fittings that normally would
connect to the heater) Try the drilled thermostat 1st
as that is"cleaner" and less fuss.

 

u shouldnt have cut off that part of the coolant system one of the heater hoses are straight off the pump u are cutting off ur flow

 

thanks alot I am really glad for allof your replies. helps a bunch i have been trying to figure out this for like 2 weeks lol

 

You will want a by pass, just the thermostat buy its self can not flow 37gpm.
A thermostat with holes drilled in it (aka a high flow) thermostat wont do the job eathere.
Drilling the thermo or installing a high flow will work great for low speed driving. Once you get on the high way you could still over heat like crazy.