i replaced my blower motor to no avail it still doesnt want to blow lots threw the vents,anyone have a problem with this before,could it be a disconnected or plugged vent cuz i changed my heater controls also so it all works properly someone must of had this problem before,thanks fo any help(and its a 92 cavalier z24 with a/c and an auto in case that helps)

It maybe the air passage through heater core blocked with dust/debris.

Mine was almost completely blocked off, you can usually get access to it from the hole left when you remove the blower motor.

You can use a soft brush or even a shop vac---- carefully.

Other people have had this problem, the posts may be quite a long way back.

My airflow was really a blast after cleaning.


Alont

ok so if i pull my blower motor back out and take a shop vac it should suck it out do i have to watch how far i put it in cuz the heater core,cuz its -20 here and more heat the better,thanks for the reply

Yes, just be careful you don't damage the core.

Actually the core you can see is the A/C evaporator, the heater core is behind that but it's the evap core that gets blocked('cos it's first in line after the blower)


Alont

is there any way to remove the a/c evaporator or should i just try a small brush,cuz i have it all exposed under the dash right now,thanks for all the help so far

i did like you said and i took out the blower motor and used a wire brush and shop vac cleaned it for about 2 hours to make sure i got pretty much all of it and it works great now,i have to turn down the heat now,thanks for all the help

Great to hear you fixed it---now it's working "As Advertised"--may also help someone else.


Alont

I just did this on one of my 94s, and even though I didnt do what I thought was a very good job cleaning... it was still a night and day difference. I wanted more room than just the blower motor hole gave me, so I took all the top and first bottom bolt from each side of the whole heater box out. Then I took a bungee cord and pulled the box out far enough to work in there. Plenty of room to get in with a shop vac and a stiff brustle toothbrush.

Good post here, this was very helpful!



JLP
90 Cav<--- "1LE" MPFI car
79 Monte<--- 11.82 @ 112.72

where is the blower motor in a second gen ?

under the hood on the passanger side,i think there are 5 7mm bolts holdin it in,if you have a strut bar you will have to remove that and pull the alternator off and your off to the races,if its the V6,well GL