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Old 09-25-2017, 08:58 AM   #1 (permalink)
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Default Heater Problems

The Heater in my 87 Samurai has adequate air flow when set on Vent. But when I change to Defrost or Heat the air flow is almost non existent. The selector cable seems to be doing what it's supposed to, but it looks like it is causing the air flow to be blocked? I have blown compressed air back thru the heater vent with little or no results.
Any suggestions?
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Old 09-25-2017, 09:14 AM   #2 (permalink)
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Quote:
Originally Posted by Rouko View Post
The Heater in my 87 Samurai has adequate air flow when set on Vent. But when I change to Defrost or Heat the air flow is almost non existent. The selector cable seems to be doing what it's supposed to, but it looks like it is causing the air flow to be blocked? I have blown compressed air back thru the heater vent with little or no results.

Any suggestions?


So you did the blower mod? Where you cut a hole in the blower motor, and blow compressed air through it?

Also, the samurai is odd and only allows for heat to come out of defrost and the feet. Everywhere else is cold or “outside air”
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Old 09-25-2017, 01:08 PM   #3 (permalink)
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What might help is flushing your heater out, might be full of old coolant fluid. Here check this video out, very helpful.

- For effectiveness/cleanliness

- To locate Suzuki heater hose location/information


Hope this helps!
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Old 09-25-2017, 01:20 PM   #4 (permalink)
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The problem is not temperature, it's lack of air flow. I'm running a 190 degree thermostat.
Something is blocking the air flow on heat and defrost but not vent?
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Old 09-25-2017, 02:38 PM   #5 (permalink)
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I see, well sometimes a lot of debris get stuck in the heater box.




Possibly?
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Old 09-25-2017, 03:00 PM   #6 (permalink)
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Airbox full of poop by the sounds of it. Very common if parked under trees

Suzuki Club UK - Clean your SJ Heater

Same as above really
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Old 09-25-2017, 03:04 PM   #7 (permalink)
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This is how bad they can get , heater matrix is under that lot

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Old 09-25-2017, 03:14 PM   #8 (permalink)
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If I remember correctly when on vents you can only have cold as it bypasses the heater matrix, this is why it has so much more power. I believe you can still buy a cover for the intake vent to reduce the amount of crap that can get in there. Also make sure you keep the airbox drains in the engine bay clear, 2 rubber tubes coming through the firewall .
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Old 09-27-2017, 03:04 PM   #9 (permalink)
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Quote:
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I believe you can still buy a cover for the intake vent to reduce the amount of crap that can get in there..
Is it worth putting holes in the hood? Anything for rust protection from where you have to screw in?
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Old 09-27-2017, 03:44 PM   #10 (permalink)
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Nothing provided, I guess you would have to use whatever you deem suitable.

Suzuki Samurai Air Intake Scoop (SEB-AIS)
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