Hot air from the cooling vents...?

Body, Paint, Interior and Trim questions and answers

Moderators: timk, Stu, zombie, Andrew, -alex, miata

Silvia
Racing Driver
Posts: 677
Joined: Thu Nov 17, 2011 1:42 pm
Vehicle: NB8B
Location: Moffat Beach QLD.

Hot air from the cooling vents...?

Postby Silvia » Tue Dec 27, 2011 11:44 am

This problem has been traced to the black rubber seal across back of engine bay and bonnet getting tired and letting hot engine air past and into the ventilation system under windscreen. Damn nuisance in hot climates...
I've fixed it by getting a strip of door sealer (foam strip with sticky back) . Run it across the top of the seal and stick down. Or leave the sticky back covered and draw it through the hollow body seal with a wire to "fatten " it.
So much better :D
Silver Nomad
2002 NB8C

User avatar
bootz
Racing Driver
Posts: 887
Joined: Thu Aug 19, 2010 1:13 pm
Vehicle: NB8B
Location: The Wild Wild West

Re: Hot air from the cooling vents...?

Postby bootz » Tue Dec 27, 2011 4:14 pm

There is also a problem with the heater not closing properly.
Bootz and Boof - On the road to somewhere.

93_Clubman
Speed Racer
Posts: 11857
Joined: Mon Aug 08, 2005 11:35 pm
Vehicle: Clubman
Location: Melbourne

Re: Hot air from the cooling vents...?

Postby 93_Clubman » Wed Dec 28, 2011 3:55 pm

Silvia wrote:This problem has been traced to the black rubber seal across back of engine bay and bonnet getting tired and letting hot engine air past and into the ventilation system under windscreen.

Also assuming the bonnet hinges hadn't been spacered to lift it slightly.

Silvia
Racing Driver
Posts: 677
Joined: Thu Nov 17, 2011 1:42 pm
Vehicle: NB8B
Location: Moffat Beach QLD.

Re: Hot air from the cooling vents...?

Postby Silvia » Wed Dec 28, 2011 4:08 pm

Pleased to report the door sealer strip has made a noticeable difference to the cockpit air temp.
Silver Nomad
2002 NB8C

User avatar
aviper4u
Fast Driver
Posts: 258
Joined: Sat Jan 23, 2010 12:36 pm
Vehicle: NB8B
Location: Sydney
Contact:

Re: Hot air from the cooling vents...?

Postby aviper4u » Sat Feb 04, 2012 5:31 pm

hey interested in sorting out the hot air vent problem myself though where did you get the sealer from?

the US forums talk about putting foam 1/2 " OR 3/8" foam tube through the existing tube.

what have other people tried?

thanks
Can you remember your first drive?

manga_blue
Forum Guru
Posts: 4897
Joined: Mon Apr 24, 2006 7:27 pm
Vehicle: NA8
Location: Moruya, NSW

Re: Hot air from the cooling vents...?

Postby manga_blue » Sat Feb 04, 2012 5:49 pm

I've tried the foam tube inside and then the door sealing strips but eventually gave up and went and bought a new strip from Mazda. Much easier and better in the long run.
’95 NA8

Silvia
Racing Driver
Posts: 677
Joined: Thu Nov 17, 2011 1:42 pm
Vehicle: NB8B
Location: Moffat Beach QLD.

Re: Hot air from the cooling vents...?

Postby Silvia » Sat Feb 04, 2012 7:36 pm

The door sealing foam seems to be doing fine after over a month. Got it from Supercheap by the roll,Bunny's etc. have it too....even $2 shops. Handy stuff for any rattles or drafts......
Silver Nomad
2002 NB8C

User avatar
aviper4u
Fast Driver
Posts: 258
Joined: Sat Jan 23, 2010 12:36 pm
Vehicle: NB8B
Location: Sydney
Contact:

Re: Hot air from the cooling vents...?

Postby aviper4u » Mon Feb 06, 2012 7:34 pm

ended up putting some clear plastic hose through the existing rubber seal though the air coming out of the vents seems to be cooler it by no mean as cool as outside.

how much did the stealership want for a new seal?

as anybody got the air coming into the cabin much cooler then outside or is it practically impossible.
Can you remember your first drive?

Silvia
Racing Driver
Posts: 677
Joined: Thu Nov 17, 2011 1:42 pm
Vehicle: NB8B
Location: Moffat Beach QLD.

Re: Hot air from the cooling vents...?

Postby Silvia » Mon Feb 06, 2012 7:52 pm

Many find the heater vent flap near the glovebox does not quite close, letting heat through. Worth checking, but often gearshift boots are damaged and let heat in from the gearbox, so check that too......but some heat will always come in from the transmission tunnel. Could be good in winter :P
Silver Nomad
2002 NB8C

User avatar
Garry
Speed Racer
Posts: 3481
Joined: Sun Apr 27, 2003 11:00 am
Vehicle: NB SP
Location: God's Country
Contact:

Re: Hot air from the cooling vents...?

Postby Garry » Thu Feb 16, 2012 10:48 am

A common problem plagueing NA's and NB's. Not sure if Mazda sorted it out on the NC. I've played around with a few things and improved the situation a little but once the outside temperature gets into the early 20's things still get heated. I dont know why it's so hard for Mazda as it also reduces the effectiveness of the A/C which is marginal at best. My Mitsubishi Mirage manages to be able to get ambient temperature air into the cabin.
Shiney black one with added red bits. Member of the fart club. Now with extra doof and Sunlong. - deceased and gone to heaven

Silvia
Racing Driver
Posts: 677
Joined: Thu Nov 17, 2011 1:42 pm
Vehicle: NB8B
Location: Moffat Beach QLD.

Re: Hot air from the cooling vents...?

Postby Silvia » Thu Feb 16, 2012 1:35 pm

"as anybody got the air coming into the cabin much cooler then outside or is it practically impossible."

How could incoming air be cooler than outside....without using a/c?

You have to remember you are sitting beside ,almost on top of, a hot gearbox. Price you pay for low centre of gravity...great handling.
I saw someone replaced their tunnel insulation with 2" thick stuff....maybe helpfull?
Silver Nomad
2002 NB8C

sean2
Driver
Posts: 25
Joined: Fri Sep 23, 2011 2:01 pm

Re: Hot air from the cooling vents...?

Postby sean2 » Sat Feb 18, 2012 4:00 pm

Silvia wrote:Many find the heater vent flap near the glovebox does not quite close, letting heat through. Worth checking, but often gearshift boots are damaged and let heat in from the gearbox, so check that too......but some heat will always come in from the transmission tunnel. Could be good in winter :P

Any more info on that one mate?


Return to “MX5 Body, Paint, Interior & Trim”

Who is online

Users browsing this forum: No registered users and 226 guests