'92 SSEI heating system, low air flow - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-28-2003, 06:52 PM   #1
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Default '92 SSEI heating system, low air flow

I am learning so much from these forums.

In my '92, my heating/cooling system makes all sorts of noise when the blower is on high, but it doesn't seem to blow out as much air as you would expect for all of that noise.

Reading some of these posts, I am seeing something about dirty or clogged evaporator cores. Does all air always go through this?

What does it take to inspect the evap core and clean it out?
Thanks
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Old 07-28-2003, 07:10 PM   #2
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Default Re: '92 SSEI heating system, low air flow

Quote:
Originally Posted by TelePlayer
Reading some of these posts, I am seeing something about dirty or clogged evaporator cores. Does all air always go through this?
I... think so. Chilled or room-temperature air, yes. Heated air passes through the heater core (obviously), but from what I remember of dismantling mine last week, I guess it has to go through the evap to get to the heater anyway.

Quote:
What does it take to inspect the evap core and clean it out?
Thanks
You can peek at the upper right quadrant of it by removing the Maxifuse/Relay Center cover, then unscrewing the three screws that hold the blower resistor pack (for C61 manual-A/C cars) or electronic blower speed controller (for C68 electronic A/C cars), which sits on the top of the evaporator/heater core housing. (It'* on the center of the firewall below the relays.) That will open up a largish rectangular hole (about the size of your hand) through which you can see the evaporator.

In a week or two I'll have some photos of this, which I took over the weekend while reassembling my '93 with a new evaporator installed.

There'* also a TechInfo bulletin on cleaning it out; that may help you.
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Old 07-28-2003, 09:44 PM   #3
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Try this for starters: http://www.bonnevilleclub.com/techinfo/?article=62
Any questions just ask (I wrote it).
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