Adam_Dawg78
LVC Member
I am in disparate need of help on my no heat issue!
I have tried and tried to fix this no heat issue, but cannot get it fixed. Below is a brief history of repairs. I apologize for the long message, but besides the pressure test I'm about to do, I don't have any idea what else I can do, so I just want to make sure I don't leave something out that could help lead to a fix.
02 LS V6 about 150,000 miles
Each repair included a cooling system drain and fill
1st repair January 2013
spark plugs had gone bad, changed all six
February
Misfire code, ended up changing the right side (driver side) coils
couple weeks later
changed the left 3 coils and electrical connectors for all six, pcv valve and elbow (big mistake)
ever since then engine light has remained on and code was for an air leak. Since the pcv elbow is no longer available, I tried to find the closest match. it didn't work and was leaking a small amount of air. Since it wasn't that bad I just left it.
Mid summer, bad hesitation, shaking at stop and around 60. Replaced the passenger side head gaskets. Broke a bolt, bitch to get out, put new bolts in, last one broke, but it broke in a way that it could still be tightened. I was so pissed by then, I just tightened it and left it. Hesitation/shaking gone
I asked my wife late summer if it was me or if the air wasn't as cold as usual, she said it felt a little warm too. didn't think much of it until Late October when my wife said the heat wasn't working
After a ton of research, I thought there was probably air in the system, because each time I refilled the system, I couldn't open the engine air bleed because it was stripped, so I took off the upper intake hose and used that as a guide.
I ordered a new radiator hose, also put in a new thermostat while I was in there.
still no heat.
drained cooling system again,
Used a flush kit. drove it a couple days, then flushed it out.
Back-flushed the heater core, by removing quick connect hoses from metal lines, all lines sent water in and back out.
put it all back together, no heat
This week, the small air leak became an annoying loud whistling sound. Fed up with the whole pcv elbow thing, I just ran a hose from the pcv valve directly to the manifold. no more whistle, no more leak, no more engine light. but still no heat.
Here is everything I have tried:
Drained and filled system approximately 6 times
Flush and fill, back flushed heater core
checked fuses under hood and in cabin
DATC Test, Floor and off then auto, one side counts to 25 the other down from 25, then all the lights illuminate. No codes displayed. Also during the test you can hear the doors in dash opening and closing or whatever they do, sound like an house door opening, so I figured this ruled out the Bypass door being stuck. Also no code figured it wasn't a bad evaporator discharge air temp sensor
new upper radiator hose (Upper radiator hose screen not clogged)
unplugged DCCV
cleaned DCCV
broke DCCV while doing the flush and fill, I ended up putting it back with some of the rubber plumbing still in tack. Flushed the cleaner, filled system, NO heat. Took DCCV back off, took the rubber parts off, the little rod inside that part was covered in sandy gunk, after gutting it as much as I could, I cleaned the gunk off and reinstalled.
I filled the system, following instructions to a T, replaced engine air bleed when coolant escaped, closed bleeder valve when stream of coolant came out, ran it at 1500 rpms, released air, drove it couple days, opened heater air bleed...... BUT
NO HEAT
I feel I have tried everything and with DCCV gutted, I can't think of any reason why there is still no heat, unless its an air leak. So last night I spent 3 hours trying to get air out. When I idle at 1500 for 3 mins and open heater air bleed, it seems to release air, coolant sprays out, has some bubbles, then stops and nothing comes out. Opened it up and let it idle for a while and nothing would come out. When engine is revved and returns to idle a small burst of coolant comes out and usually the first part of the burst has bubbles (its not just solid fluid, seems to have air in it) but then nothing after that. If I squeeze the upper or lower radiator hose, coolant spits out heater air bleed hose, but then nothing.
I touched the metal lines on passenger side, the top 2 where a little warm, the bottom one, which I believe is the return is too hot to touch.
I just rented a pressure tester and am about to go try that. I will post the results of the pressure test.
Could it be because a lot of air got into the system and it all isn't out yet? If this could be the reason is there a way to get the air out, maybe using a vacuum pump to pull the air out the heater air bleed?
If any one has any other ideas, please send them my way.
I have tried and tried to fix this no heat issue, but cannot get it fixed. Below is a brief history of repairs. I apologize for the long message, but besides the pressure test I'm about to do, I don't have any idea what else I can do, so I just want to make sure I don't leave something out that could help lead to a fix.
02 LS V6 about 150,000 miles
Each repair included a cooling system drain and fill
1st repair January 2013
spark plugs had gone bad, changed all six
February
Misfire code, ended up changing the right side (driver side) coils
couple weeks later
changed the left 3 coils and electrical connectors for all six, pcv valve and elbow (big mistake)
ever since then engine light has remained on and code was for an air leak. Since the pcv elbow is no longer available, I tried to find the closest match. it didn't work and was leaking a small amount of air. Since it wasn't that bad I just left it.
Mid summer, bad hesitation, shaking at stop and around 60. Replaced the passenger side head gaskets. Broke a bolt, bitch to get out, put new bolts in, last one broke, but it broke in a way that it could still be tightened. I was so pissed by then, I just tightened it and left it. Hesitation/shaking gone
I asked my wife late summer if it was me or if the air wasn't as cold as usual, she said it felt a little warm too. didn't think much of it until Late October when my wife said the heat wasn't working
After a ton of research, I thought there was probably air in the system, because each time I refilled the system, I couldn't open the engine air bleed because it was stripped, so I took off the upper intake hose and used that as a guide.
I ordered a new radiator hose, also put in a new thermostat while I was in there.
still no heat.
drained cooling system again,
Used a flush kit. drove it a couple days, then flushed it out.
Back-flushed the heater core, by removing quick connect hoses from metal lines, all lines sent water in and back out.
put it all back together, no heat
This week, the small air leak became an annoying loud whistling sound. Fed up with the whole pcv elbow thing, I just ran a hose from the pcv valve directly to the manifold. no more whistle, no more leak, no more engine light. but still no heat.
Here is everything I have tried:
Drained and filled system approximately 6 times
Flush and fill, back flushed heater core
checked fuses under hood and in cabin
DATC Test, Floor and off then auto, one side counts to 25 the other down from 25, then all the lights illuminate. No codes displayed. Also during the test you can hear the doors in dash opening and closing or whatever they do, sound like an house door opening, so I figured this ruled out the Bypass door being stuck. Also no code figured it wasn't a bad evaporator discharge air temp sensor
new upper radiator hose (Upper radiator hose screen not clogged)
unplugged DCCV
cleaned DCCV
broke DCCV while doing the flush and fill, I ended up putting it back with some of the rubber plumbing still in tack. Flushed the cleaner, filled system, NO heat. Took DCCV back off, took the rubber parts off, the little rod inside that part was covered in sandy gunk, after gutting it as much as I could, I cleaned the gunk off and reinstalled.
I filled the system, following instructions to a T, replaced engine air bleed when coolant escaped, closed bleeder valve when stream of coolant came out, ran it at 1500 rpms, released air, drove it couple days, opened heater air bleed...... BUT
NO HEAT
I feel I have tried everything and with DCCV gutted, I can't think of any reason why there is still no heat, unless its an air leak. So last night I spent 3 hours trying to get air out. When I idle at 1500 for 3 mins and open heater air bleed, it seems to release air, coolant sprays out, has some bubbles, then stops and nothing comes out. Opened it up and let it idle for a while and nothing would come out. When engine is revved and returns to idle a small burst of coolant comes out and usually the first part of the burst has bubbles (its not just solid fluid, seems to have air in it) but then nothing after that. If I squeeze the upper or lower radiator hose, coolant spits out heater air bleed hose, but then nothing.
I touched the metal lines on passenger side, the top 2 where a little warm, the bottom one, which I believe is the return is too hot to touch.
I just rented a pressure tester and am about to go try that. I will post the results of the pressure test.
Could it be because a lot of air got into the system and it all isn't out yet? If this could be the reason is there a way to get the air out, maybe using a vacuum pump to pull the air out the heater air bleed?
If any one has any other ideas, please send them my way.
