So I bought this red 86 in Feb non turbo it's been having some cooling issues. I changed the water pump and the filler neck cap the overflow hose nipple was broken there. I also put a new thermostat and radiator cap in. The car had over heated again the other day it was really hot and traffic was going slow. I didn't let it hit H on the meter but I figured it would if I had if I let it run. We didn't bleed it after I had changed the over flow hose and filler cap. So I bled it today let the car run in idle till it was at temp everything seems to be working ok but when I tested the heater it was fairly week. The air blows stronger but it's just not very warm. Any suggestions? I'm worried its going to over heat again.

 

If the heat still isnt blowing hot, then you have an air pocket still. A cheap filler bottle can be made out of a 2 litter soda bottle, cut in half and get creative on how to hold it in place over the filler neck. Fill with water/coolant, bring the car to operating temp and then rev to about 2k rpms, snap the throttle and set the heat to high. Watch you bottle for no more bubbles and consistent heat from the vents.

 

Ok so I had it pressure tested and it lost pressure after a few hours of running any ideas they couldn't find a leak anywhere i think they said it lost 4 PSI

 

That worked really well to work all the bubbles however it is still getting air into the system. I can drive for like an hour at a time a few times a week and no overheating. I do notice that the coolant isn't at the top of the filler after awhile of driving.

 

Sounds like you have a leak somewhere.

 

What does your exhaust look/smell like?

 

exhaust smells fine it was sitting for like 4 days went to bleed the system today and it started up with 0 issues and the small smoke puff smelled a little gas like but nothing abnormal. I can't find any leaks after the car sits is there any good way to find a leak in a coolant hose or should i just start replacing hoses?

 

Rent a pressure tester from advance and pressure test the system. You will find your leak, be it a hose, gasket or worse case a coolant seal

 

I had it pressure tested by a mechanic it lost pressure does the pressure tester tell you where the leak is?

 

no it wont. but a bright flashlight and some detective work will.

i have a "spill free funnel" and it works really well for bleeding cooling systems. google that phrase and youll see what it is and why it works so well

 

i like to use the pneumatic evacuator. it puts a vacuum of roughly 20-25in/hg on the system. leave it under vacuum for a few minutes to make sure it holds. then the vacuum pulls all your coolant in from a pale. it's ingenius because not only will you never get an airlock, on any system, but this also performs a leak check while doing so.
mind you, some leaks show in the presence of pressure but not vacuum