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oil leaking from stack guage cluster!?!?

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Old 10-28-08, 09:43 AM
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is tempted

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oil leaking from stack guage cluster!?!?

i just picked up a 91 vert' and there is oil leak from what appears the gauge cluster i havnt bothered to tear everything apart yet, but this is very strange, it is my understanding that oil pressure gauge is electrical, and i cant think of any oil line that runs through the firewall, let alone into the dash.. any ideas before i get to figuring it out myself?
Old 10-28-08, 09:45 AM
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no oil lines do run inside the car. check behind the dash to see if at some point someone installed a mechanical aftermarket gauge. usually a white nylon tube
Old 10-28-08, 09:54 AM
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It's probably the oil seal in your speedo drive gear.
Oil is being conducted up the speedo cable and leaking from the connection at the gauge cluster.
Old 10-28-08, 09:58 AM
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Originally Posted by clokker
It's probably the oil seal in your speedo drive gear.
Oil is being conducted up the speedo cable and leaking from the connection at the gauge cluster.
bingo.
Old 10-28-08, 11:51 AM
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no aftermarket guage installed, already looked for that, i had guessed the the tranny fluid from the speedo cable, but it seems to be motor oil, tranny fluid has a pretty distinct stink to it, this smelt like motor oil, maybe the previous owner was retarded and used motor oil in the tranny? lol
Old 10-28-08, 02:36 PM
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Engine, Not Motor

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The only place it could be is from the speedometer drive cable.

People do weird things...They put ATF in their engines, so maybe the previous owner thought that turnabout was fair play and put engine oil into the transmission?

Then again, there are many synthetic transmission oils (Amsoil...) that don't smell funky.
Old 10-28-08, 02:59 PM
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I had this same problem in my last FC and i want to know were it was coming from. The oil was leaking down from somewere high up in the dash area running down to the right and left of the sterring coloum then dripping on my pants. It also dripped threw the speaker slots. I could never figure this out i took some of the dash apart to see if i could figure it out. The more you hit boost and drove hard the faster it leaked. when you figure it out LET ME KNOW!

Last edited by just startn; 10-28-08 at 03:01 PM.
Old 10-28-08, 03:37 PM
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good point aaron, makes i guess, what needs to be replaced to stop this from happening? just startn- if its the same thing, its rpm related but i can see how it would seem to be from boost in a turbo car
Old 10-28-08, 03:41 PM
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There is an o-ring in the drive gear assembly on the transmission that you need to replace.
Old 10-28-08, 03:47 PM
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ive got a haynes at home but not with me, am i going to have to drop the tranny to get to this? any idea on the size of the oring?
Old 10-28-08, 04:04 PM
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Originally Posted by Templeton
ive got a haynes at home but not with me, am i going to have to drop the tranny to get to this? any idea on the size of the oring?
there is 1 10mm bolt holding it on. you can get to it by removing the speedo cable. mazdatrix has the oring on their site.
Old 10-28-08, 04:13 PM
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awesome thank 87-t66
Old 10-28-08, 04:15 PM
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Originally Posted by just startn
I had this same problem in my last FC and i want to know were it was coming from. The oil was leaking down from somewere high up in the dash area running down to the right and left of the sterring coloum then dripping on my pants. It also dripped threw the speaker slots. I could never figure this out i took some of the dash apart to see if i could figure it out. The more you hit boost and drove hard the faster it leaked. when you figure it out LET ME KNOW!
did you not read anything that was posted? or...?
Old 10-29-08, 10:58 AM
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i spent like 15 minutes on their page and couldnt find it, anyone know wat size it is offhand?
Old 10-29-08, 11:12 AM
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Originally Posted by Templeton
i spent like 15 minutes on their page and couldnt find it, anyone know wat size it is offhand?
Actually, I misspoke (or miswrote, to be accurate), there are TWO things that will need replacing.
The previously mentioned o-ring will stop a leak at the transmission where the drive gear assembly is inserted, but if your leak is internal- as it would be to force oil up the cable- there is also a regular oil seal in there.
Fortunately, my leak just required the o-ring replaced cause getting that internal seal out looked like a bitch.

Both parts are available from a dealer- combined cost was @$8.

I have a new seal- never used- if it turns out you need one.
Old 10-29-08, 11:59 AM
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looks like mazdatrix's site is down right now. its on the same page as the speedo cables.
Old 10-29-08, 01:39 PM
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hey i got oil comen out my vents inside the car its a 91 any ideas
Old 10-29-08, 02:51 PM
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Read This Thread! ^^^
Old 10-29-08, 02:55 PM
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Originally Posted by hondakillerfc
hey i got oil comen out my vents inside the car its a 91 any ideas
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