Mole
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| posted on 20/4/08 at 05:04 PM |
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Type 9 Oil leak
Just attempted filling my gearbox today and the oil began to drip out of a small "hole" on the bottom of the main case. Cannot find any
reference to it in my rather ancient sierra haynes manual. Anyone any idea how to fix it properley before I resort to a bodge?
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jacko
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| posted on 20/4/08 at 05:26 PM |
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Can you get a photo of the hole
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Mole
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| posted on 20/4/08 at 05:56 PM |
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yes but I cannot post it it worked fine earlier
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Mole
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| posted on 20/4/08 at 06:00 PM |
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Description
Wahooo. Doesn't really show the hole though but it was the best I could do. Its about 9mm diameter and maybe 5mm deep.
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rusty nuts
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| posted on 20/4/08 at 06:07 PM |
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Is it a machined hole or damage? Not easy to tell from picture
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Mole
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| posted on 20/4/08 at 06:10 PM |
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definately a machined holed. You cannot see for the oil .
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rusty nuts
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| posted on 20/4/08 at 06:17 PM |
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Will have a look at my car tomorrow to see if I can see what the hole is if I get a chance .
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Thinking about it
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| posted on 20/4/08 at 06:24 PM |
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Can't quite work out which part of the gearbox is from the pic. I have my gearbox to hand if you have another one and I will have a look now.
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stevec
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| posted on 20/4/08 at 06:24 PM |
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I reckon that the hole has been drilled by someone for whatever reason may be to get the oil out as they do not have a drain plug, you may need to
thread it an put a bung in it
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Mole
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| posted on 20/4/08 at 06:30 PM |
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quote:
Originally posted by Thinking about it
Can't quite work out which part of the gearbox is from the pic. I have my gearbox to hand if you have another one and I will have a look now.
Its the main case. The photo is effectively upside down because I had to shove the camera under the car.
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stevec
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| posted on 20/4/08 at 06:32 PM |
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Type 9's don't have a hole in the bottom of the main case... see my previous post.
Cheers.
Steve.
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Thinking about it
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| posted on 20/4/08 at 06:37 PM |
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Just had a look and no hole in mine.
I think Stevec has the answer.
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Mole
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| posted on 20/4/08 at 06:37 PM |
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Thanks steve. It may be a job to tap because I doubt it's deep enough. Might have to resort to that epoxy steel putty stuff.
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stevec
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| posted on 20/4/08 at 06:48 PM |
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I would persevere and try and thread it if you can, you will always be worrying that the putty will come out and lose all of your gear oil.
What about a large blind rivet?
Steve.
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Mole
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| posted on 20/4/08 at 06:51 PM |
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Rivet might be an idea. Thinking about it now I wonder if someone hasn't tried to drill a drain hole as you say and either broken off drill or
more likely tap in it because it isn't all the way through. Anyone see any issues with using a blob of weld to plug it?
[Edited on 20/4/08 by Mole]
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austin man
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| posted on 20/4/08 at 07:09 PM |
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I would leave the hole open in days gone by all bell housings had holes to allow oil to escape therefore not allowing the cluth plate to become
contamunated. they did have a pin inserted called a jiggle pin the idea being that you moved it by hand (jiggling) which allowed any iol to escape
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austin man
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| posted on 20/4/08 at 07:11 PM |
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Me thinks the front seal is knackered or you have overfilled the box
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Mole
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| posted on 20/4/08 at 08:28 PM |
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The hole is in the main case not the bell housing.
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NS Dev
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| posted on 20/4/08 at 08:51 PM |
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that photo shows the underside of the box, and the raised "bump" (actually "lowered" as its the very bottom of the box) is the
recess where the magnetic plug sits normally.
Looks like its been drilled by somebody, not a big problem, as SteveC said, check the hole size, tap it out appropriately and then seal it with a
(thin headed so it doesn't get knocked) short bolt and copper washer.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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rusty nuts
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| posted on 20/4/08 at 08:52 PM |
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Would it be possible to drill all the way through drill and tap it to take a plug of some sort?
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ragindave
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| posted on 22/4/08 at 11:09 PM |
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Holey gear box
Use J B weld as long as you can clean it and get it oil free it will seal that hole no problem.
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:{THC}:YosamiteSam
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| posted on 23/4/08 at 02:15 AM |
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you could use a rivnut if its a thin casing - then use a stainless cap head bolt
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DarrenW
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| posted on 23/4/08 at 08:32 AM |
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JB weld is pretty impressive stuff.
I had a pin hole in one of the main casing gaskets. When oil was hot and car running it would ooze out. Not wanting to remove gearbox for a while i JB
welded it. Temp fix was a lot more permanent than i expected.
Surrounding area must be clean. I roughened the surface too. You will not be able to do the repair with oil in gearbox. I got away with it cos hole
was at top. If hole is too large i would say plugging it mechanically first would be better job. Lets hope drill or tap isnt stuck in the hole and you
can drill out to tapping size to fit bolt and copper washer.
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mookaloid
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| posted on 23/4/08 at 07:49 PM |
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I think I would tap it and loctite a grub screw in so it doesn't protrude from below.
"That thing you're thinking - it wont be that."
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Mole
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| posted on 23/4/08 at 11:02 PM |
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Actually used that two part putty stuff. Really didn't fancy drilling it. Cleaned the surface first and pushed it right into the hole.
I've put some oil (back) in and so far so good.
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