Unable to bleed the cooling system.

[reidc]

Nighthawk-

Did you ever get this resolved?

I am in cold Massachusetts with the same issues.

Late last Winter i bled my system near the Tstat housing and started getting much better heat quicker than had been. This past spring- I replaced some leaky coolant hoses near TBI, and replaced thermostat with OEM- so far so good.

In summer- was overheating radiator was shot and replaced. Have not had good high fairly quick heat since. I tried to bleed it thinking the shop didn't, but nothing ever came from the nipple unless I gunned the engine- after backing off gas- coolant would come out. When back to idle- NOTHING.

I drive this thing 50 miles each way to work(one hour) with the last 45 minutes highway)- it takes 15 minutes to get warm air to clear windshield, and on commute- its warm- it never blasts me out of the car like it used to(I used to be able to dry my running clothes from the heat on my commute home!!!).

I get wisps of anti-freeze smell every now and then, my guage is just above 1/3, just below 1/2. The Upper hose is hot, while the lower hose(to the thermostat) is COLD- yes- even after my commute.

My rad Cap was recently changed(two weeks ago), and that did nothing.
With the past threads about this- I am thinking Thermostat- but wondering if there is something else going on.

Thanks
Chris

[accordztech]

sounds like thermostat again, get an oem one.

[jimbo34]

u said u changed the radiator in the summer right? did u do it or some1 els. it sounds like it could be the thermostat or lots of air pockets running through your system.

[nighthawk57]

Nighthawk-

Did you ever get this resolved?

I am in cold Massachusetts with the same issues.

Late last Winter i bled my system near the Tstat housing and started getting much better heat quicker than had been. This past spring- I replaced some leaky coolant hoses near TBI, and replaced thermostat with OEM- so far so good.

In summer- was overheating radiator was shot and replaced. Have not had good high fairly quick heat since. I tried to bleed it thinking the shop didn't, but nothing ever came from the nipple unless I gunned the engine- after backing off gas- coolant would come out. When back to idle- NOTHING.

I drive this thing 50 miles each way to work(one hour) with the last 45 minutes highway)- it takes 15 minutes to get warm air to clear windshield, and on commute- its warm- it never blasts me out of the car like it used to(I used to be able to dry my running clothes from the heat on my commute home!!!).

I get wisps of anti-freeze smell every now and then, my guage is just above 1/3, just below 1/2. The Upper hose is hot, while the lower hose(to the thermostat) is COLD- yes- even after my commute.

My rad Cap was recently changed(two weeks ago), and that did nothing.
With the past threads about this- I am thinking Thermostat- but wondering if there is something else going on.

Thanks
Chris

Finaly,i bleed the system and there was no more heat coming out after.I tried to put a cardboard over the rad and did a 1hr trip.The top hose was smoking hot and the bottom one was very hot too but less.

Not much heat improvement even with the card board so i figured that my heater core is gone.

Anyway it isen't much more of an issue right now cause the cb7 is off the road now since mid-november cause of a MAJOR oil leak around the T-Belt area.I guess it is the cam or crank shaft seal that poped out.Well,i got to wait till march to get it fixed and sell the car after.

I'm getting tired of repairing things every week or so.Might as well sell it after the repair and catch some money back.I guess the 17yo car has done is job,can't say anything bad about these vehicule,it just that i ain't got the space,time and willing to keep repairing it every time.

[reidc]

Thanks all-

Its gonna be mid forties temp wise here today so I'll get out and play with it. As I said- I tried bleeding by tstat housing, but nuttin came out. I will go visit Honda and get a new Tstat.

I pulled off cap this AM COLD- and felt vacuum when pulling of- thats cool, so I know Tstat is closed. It must be staying closed all the time.

When I replaced it during spring/summer last yr- I went with OEM, and I THOUGHT it was a 195. I also remember driving a few weeks ago, and after my commute- I felt hose and it was cold. Shut car off, and check 5 minutes later,and lower hose felt warm. Start it up, and run check 10 minutes later and its back COLD again WTF-Over???

Thx
Chris

[turbo90accord]

I think people are forgetting that the upper heater hose should be hotter than the lower.
all radiators flow from top to bottom... heat rises cold sinks.

[reidc]

I just bought another Tstat from Honda- the only ones they have are 78 degree C... which I guess equals 172 degrees F... does that sound right for here in the North???

Pulled my old one, and it is also a 78 degree C unit.

[accordztech]

I think people are forgetting that the upper heater hose should be hotter than the lower.
all radiators flow from top to bottom... heat rises cold sinks.

they should be near the same temp at operating temperature. but one shouldnt be dead cold or cool and the other one crazy hot.