Heater airflow issues
Heater airflow issues
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Discussion

davidd

Original Poster:

6,666 posts

307 months

Monday 22nd December 2025
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The teeth in the little gearbox that moves the flap to direct air between feet and screen are stripped.

I'm trying to work out how to get the motor and gearbox out so I can replace or rebuild the cog, as far as I can see it is held on by two very small, very hard to get to screws. Is there another way to get it out or some trick I am missing?

Has anyone replaced the whole thing with something better?

jauntyviper

8 posts

73 months

Tuesday 17th February
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Hi David, I was doing a similar job a couple of weeks ago my 1992 pre-cat. I had no issues with access, removing those two flathead screws allowed me to remove the motor straight away.

Perhaps it sounds obvious, but you have removed the glove box, right? That that gave me access pretty much straight through, it’s just to Allen head bolts either side of the bottom corners of the glove box on the inside.

davidd

Original Poster:

6,666 posts

307 months

Tuesday 17th February
quotequote all
jauntyviper said:
Hi David, I was doing a similar job a couple of weeks ago my 1992 pre-cat. I had no issues with access, removing those two flathead screws allowed me to remove the motor straight away.

Perhaps it sounds obvious, but you have removed the glove box, right? That that gave me access pretty much straight through, it s just to Allen head bolts either side of the bottom corners of the glove box on the inside.
Yes glove box was out, I think it is a slightly different setup on a 500. I got it apart, changed the cog around and it is more or less working properly now. A new cog will be something I need at some point.