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 Post subject: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 6:49 am 
0-60 in VERY FAST
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Joined: Mon Jul 27, 2009 10:58 pm
Posts: 158
Location: Coaldale, AB
ok, the leg's heater motor died, sort of. The motor worked one day, the next day it didn't come on till we were almost in lethbridge because I forgot it on 4. Anyhow, i turned it off and turned it back on and nothing again. The motor seems to turn fine but the resistor is flopping around in the heater assembly for what i can see through that little hole.
I was thinking of replacing the resistor because prior to this it worked fine, aswell, I only have heat all the time which for winter is ok, but I would also like to change the heat valve while im under there. Is there any tricks to changing either? Should I replace the blower motor anyhow since im taking it appart?
Any suggestions?

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1970 Mercedes 220D
1971 Daimler ds420
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1994 Honda Civic dx hatch
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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 7:34 am 
Haha, I just built a W24 Octo-Turbo, now what?!

Joined: Wed Dec 21, 2005 8:03 pm
Posts: 2859
Location: T2C
This isn't an evening job. When Volvo built the 240 they hung a heater box from the ceiling and built a car around it. If you're going to take it apart, you might as well replace what you can. You don't want to do it twice...

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Dale

'67 123GT
'67 122s
'99 AMG E55T


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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 10:58 am 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Jun 14, 2006 4:19 pm
Posts: 3131
Location: Lethbridge, AB
The new style heat valve (not the thermostatic one that is in there - the replacement is a simple valve) is easy to fit but the instructions are terrible (its a Skandix part). I've had one for 2 years and it works fine. I'm going to change out everything sometime in my 240, but for this year I'll be suffering with 2 of 4 speeds on the motor. I just dont have time for a complete heater R&R.

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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 1:14 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 7:14 pm
Posts: 1875
Location: Missing my garage in Sunnyside
...says the guy who *polished* every single piece of metal under his hood. If that doesn't tell you what a pain that job is, I don't know what does!

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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 2:08 pm 
Strapping on extra booster rockets

Joined: Sun Sep 03, 2006 8:46 pm
Posts: 360
Location: B-Ham WA/Portland, OR USA
In drippy Doug-fir needle blower box filled with crud land where one MUST have a defroster in the 10 months of rain, I have the complete blower box removal and refresh down to one day doing it the right way.

Heater fan 3-4 hours. Heater fan + t-static valve 5-6 hours.

I will say, if I do another blower box/cowl drain job on a 240 in the next week, I might puke.

It isn't that bad. Just plenty of wires and surrounding jobs. Suck it up and do it. Heat and A/C and no mold smell is nice.

Lots of people definitely scrap a car over the issue though. Buy a nice 240 with the job already done lol!

One can rebuild the volvo heater fan motor if one has time to really fuss over it. Volvo used to sell you a motor and balanced new fan blades that you'd put in with the updated resistor and switch in 82 and older cars (there are earlier versions, but 83 was the BIG update and again in ~1991) after which they'd run beautifully quiet again. The 1991 and newer ones when not neglected go a real long time. 200K miles and OG now-a-days is common. You won't get that out of an earlier car usually. The design would be fine if the damn thing NEVER broke. Such is life...or buy a new car or 700 series and newer or amazon-1800E/ES and older for much easier heater fan repair in volvo land.


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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 5:05 pm 
Haha, I just built a W24 Octo-Turbo, now what?!

Joined: Wed Dec 21, 2005 8:03 pm
Posts: 2859
Location: T2C
945_James wrote:
or buy a new car or 700 series and newer


QFT...it took me all of 20 minutes to replace the blower motor on the $250 960 on Saturday...

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Dale

'67 123GT
'67 122s
'99 AMG E55T


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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 9:34 pm 
0-60 in VERY FAST
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Joined: Mon Jul 27, 2009 10:58 pm
Posts: 158
Location: Coaldale, AB
I have to take the heater box out even if I am only changing the fan? It looks like all i have to do is pop the clips and remove the end caps. Pop the clip on the one side of the fan blades, and its 3 bolts to get the fan out. The heater core looks to be in great shape so i would really rather not remove the entire box if i dont have.

I know, i know, when the opprotunity exists we will upgrade to a 960 model but the 240 is cheaper right now, plus you see more of the 240 at pick your part.

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1970 Mercedes 220D
1971 Daimler ds420
1977 Mercedes 230
1979 Mercedes 300TD
1993 Honda Del Sol Si
1994 Honda Civic dx hatch
2015 Mazda CX-5
2020 Hyundai Elantra manual
1982 240 DL coupe


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 Post subject: Re: Heater System Overhaul
PostPosted: Thu Sep 30, 2010 10:02 pm 
Haha, I just built a W24 Octo-Turbo, now what?!

Joined: Wed Dec 21, 2005 8:03 pm
Posts: 2859
Location: T2C
You need to take most of the dash apart to get the side panel(s) off so while it's simpler to do just the fan, it's almost as much work. If the heater core is good, no sense messing with it...

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Dale

'67 123GT
'67 122s
'99 AMG E55T


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