99 TA No Heat
Thread Starter
Registered User
Joined: Nov 2017
Posts: 3
Likes: 0
heater core? Hi, and thanks for the reply.
Why are you so sure that's the issue. I know it could be, but only that?
I should have mentioned that when I did the work on my GF car, [original owner], had center dash apart as I was installing new audio system.
Now I wonder if I goofed something up with the hvac controls? Possible?
Also could have sworn that I burped this enough to get out any possible air blocks, but now I am 2nd guessing myself. I will have access to her car on Monday, and then it will go back into storage for the winter. Monday is the day for me to rectify this issue.
Thoughts?
Why are you so sure that's the issue. I know it could be, but only that?
I should have mentioned that when I did the work on my GF car, [original owner], had center dash apart as I was installing new audio system.
Now I wonder if I goofed something up with the hvac controls? Possible?
Also could have sworn that I burped this enough to get out any possible air blocks, but now I am 2nd guessing myself. I will have access to her car on Monday, and then it will go back into storage for the winter. Monday is the day for me to rectify this issue.
Thoughts?
Heater cores don't fail....they only leak. As long as coolant is flowing through it.....you have heat.
Here's what I would do....
---Completely cold engine---
Take off both heater hoses from the two water pump ports.....cap off those two heater pump ports so you lose as little coolant as possible from those ports.......Take a garden hose with a spray handle on it so you can regulate how strong the water pressure sprays out. Stick the tip of the spray nozzle into one of those heater hose ends and gently, slowly....spray water into it until you see a solid stream of water coming out of the other heater hose end......then let it run like that for 30 seconds.......under LOW spray pressure, just enough to get it to flow through the heater core and those two heater hoses.
Then attach both hoses.......remove the radiator cap and start the engine. Stand there by the radiator fill neck and wait until you see the t-stat open and coolant start to flow. Might take 10 full minutes or so.....
((If it takes more than 10 minutes go back and forth checking your temp gauge so you don't stand there and overheat the engine....or have someone sit in the car and watch the temp gauge))
As the level drops in the radiator....top it off IMMEDIATELY with water.
Put the radiator cap back on.....see if you have heat.
.
Here's what I would do....
---Completely cold engine---
Take off both heater hoses from the two water pump ports.....cap off those two heater pump ports so you lose as little coolant as possible from those ports.......Take a garden hose with a spray handle on it so you can regulate how strong the water pressure sprays out. Stick the tip of the spray nozzle into one of those heater hose ends and gently, slowly....spray water into it until you see a solid stream of water coming out of the other heater hose end......then let it run like that for 30 seconds.......under LOW spray pressure, just enough to get it to flow through the heater core and those two heater hoses.
Then attach both hoses.......remove the radiator cap and start the engine. Stand there by the radiator fill neck and wait until you see the t-stat open and coolant start to flow. Might take 10 full minutes or so.....
((If it takes more than 10 minutes go back and forth checking your temp gauge so you don't stand there and overheat the engine....or have someone sit in the car and watch the temp gauge))
As the level drops in the radiator....top it off IMMEDIATELY with water.
Put the radiator cap back on.....see if you have heat.
.
On The Tree
Joined: Apr 2017
Posts: 105
Likes: 0
From: Florida
It could also be that the door inside the dash panel is not switching over and closing off the cool air source......and then the heat never gets directed to the vents.....and cool air keeps blowing out the vents.
So it could be that too....for you and "Ronsdeal"......
.
Trending Topics
Yup....its a free check that takes 20-30 minutes. If thats not it....you need to see if the door is closing and opening properly inside the dash.....which is vacuum driven. Could be stuck in one position only allowing cool air in.
.
.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Staging Lane
Joined: May 2014
Posts: 58
Likes: 0
I ran into the no heat issue about 5 years ago and followed the recommendation to pop the coolant hoses off at the coolant pump and flush with water from the garden hose. It fixed my problem for a couple years at which time my coolant pump then died. When I was replacing it, I was sure to flush the heater core again for good measure while I had all the hoses off. My car's been pumping hot hot heat ever since.
Make sure to run water from the garden hose in both directions across the heater core. I would push water in one hose until it came out clean from the other hose and then swapped hoses. Repeated this several times on each hose that runs to the heater core. I find have a pair of EXTRA long reach needle noses helps when trying to pop the hose clamps off at the coolant pump and also for putting them back on.
Make sure to run water from the garden hose in both directions across the heater core. I would push water in one hose until it came out clean from the other hose and then swapped hoses. Repeated this several times on each hose that runs to the heater core. I find have a pair of EXTRA long reach needle noses helps when trying to pop the hose clamps off at the coolant pump and also for putting them back on.
My S-10 would lose heat when it was freezing cold, it worked if it wasn't that cold. I thought it was the blend door like LS6 said. I just lived with it because our winters don't last too long in Atlanta.