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Old 04-07-08, 12:02 PM   #1
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oil leak at oil filter...how to fix it?

ok like the title says, i have an oil leak at the oil filter pedistal or whatever, and it is slowly just coating the side of the engine with oil, then slowly drippin onto the ground...what is the way to fix this?
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Old 04-07-08, 12:11 PM   #2
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If the leak is from between the oil filter mount and the rear housing machined plate, you need to replace the two o-rings in between. The oil filter base has two studs (M6?) which go through the rear housing and the assembly is held together with two nuts (10mm wrench size) underneath.

Make sure the leak isn't from the oil filter gasket area (maybe two oil filter gaskets because of one staying during an oil change, etc.).
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Old 04-07-08, 12:22 PM   #3
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well i thought it might have been the old oil filter, so i changed my oil last night, and yep, its doing it again. can anyone basically give a quick few sentence how to on how to replace the orings so i can do this within the next few minutes?
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Old 04-07-08, 12:27 PM   #4
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Make sure that there is only one oil filter gasket. (sometimes they come off the old oil filter and stick to the pedistal.) if you put a new oil filter on the old gasket, ur gonna have a leak.

(just an easy free check you can do b4 u order a pedistal)
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Old 04-07-08, 12:30 PM   #5
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ive been trying to read up on it, and no one has said anything about having to replace the pedistal, just replacing the 2 orings, and i know for a FACT that there is only one gasket on the oil filter! lol
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Old 04-07-08, 12:41 PM   #6
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The two o-rings are BETWEEN the oil filter pedestal and the rear iron.
There are two 10mm nuts UNDERNEATH the oil filter pedestal that you need to remove.
You cannot see this from the top when you remove the oil filter.
Once you get the two nuts out, the two o-rings are obvious.
http://fc3spro.com/TECH/PROBLEMS/P1/...IL/leakso.html
Click the image to open in full size.

Mazda part number: 9954-10-1601
You need two of them.
They are about $5 / each.

I doubt it's the oil filter pedestal itself.
Unless the oil filter pedestal got damaged from a bonehead, it's most likely the o-rings.


-Ted

Last edited by Aaron Cake; 05-29-08 at 01:42 PM. Reason: Remove insult
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Old 04-07-08, 01:01 PM   #7
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I have never hear of the pedestal being cracked. Usually, the o-rings are the culprit, simply hardening due to age. You just order new o-rings (I don't risk this type of part with non-OEM parts), remove the two nuts on the bottom of the rear housing flange (where the pedestal attaches to), bump the pedestal gently with a rubber mallet (up direction) if needed, replace the o-rings, then reverse the procedure. You may want to remove the old (new) filter but it's not mandatory.
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Old 04-07-08, 01:24 PM   #8
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replace the o-rings, tighten it back down when u are done and u will be fine..
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Old 05-29-08, 01:32 PM   #9
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Excuse my large hands and limited tools but both nuts (especially the rear one) are nearly untouchable in my 88 vert. I'd appreciate any honest advice to the level of disassembly to get at them. Pictures are a good thing, The one from FC3S Pro is better then the exploded view in my shop manual but alas my engine is in the car and hanging in the air.
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Old 05-29-08, 04:12 PM   #10
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***HOW TO REPLACE THE O-RINGS***
-Get a flashlight
-Get a short 10mm open end wrench
-Get under the car
-Use the flashlight and look at the bottom of the oil filter
-See the 10mm nut? Use the wrench and take the nut off
-Get out from under the car
-Stand by the driver's side fender and look at the oil filter
-Holding the wrench, cram your left hand in front of the oil filter
-Feel underneath the oil filter for the 10mm nut and remove it
-Go put ice on your hand because I know its scraped up
-Remove oil filter and pedestal
-Replace o-rings
-Reinstall
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Old 05-29-08, 05:41 PM   #11
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Thanks Phil(?) I already found the nuts last night and used topical antibiotic and benzocaine on the knuckles doing that and trying to work from above. Not having a lift and/or a good jack and stands I tend to work from above in my car port reapir area. Thanks for the advice on going after the rear nut from below.
John
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Old 05-29-08, 07:16 PM   #12
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tell me how it goes because i think this is why my 1988 GTU RX7 is leaking from the oil filter too.. i was thinking of replacing it with a new pedestal. but i suppose i'll try replacing the o rings too. hope its not cracked as so... but hey guys, i'm now confused.. i'm wondering if oil is leaking from the oil pump behind the water pump housing because i see a streak of oil running down.. i dont know what issue really is.. i'll try getting some photos by tomorrow or so...
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Old 05-30-08, 02:08 PM   #13
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Quote:
Originally Posted by hey111you View Post
Thanks Phil(?) I already found the nuts last night and used topical antibiotic and benzocaine on the knuckles doing that and trying to work from above. Not having a lift and/or a good jack and stands I tend to work from above in my car port reapir area. Thanks for the advice on going after the rear nut from below.
John
thats good to hear! that back nut closest to the firewall is a pain to get from above...but you do what you have to do. The AC line and brake reservoir don't help...good luck getting the nuts back on
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Old 05-30-08, 04:17 PM   #14
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Quote:
Originally Posted by b16eg View Post
ok like the title says, i have an oil leak at the oil filter pedistal or whatever, and it is slowly just coating the side of the engine with oil, then slowly drippin onto the ground...what is the way to fix this?
Tighten the filter
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Old 05-30-08, 05:52 PM   #15
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The first larger leak that I tracked down from that area was from doing the filter TOO hand tight. After clearing that up I was able to degrease again and spot the small leak at the pedestal/engine joint.
But first I gotta take care of the sagging springs this weekend now that I got them delivered and the weather for Sat is forecasted clear.
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Old 05-30-08, 05:54 PM   #16
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Yes there always is the ".. assembly is the reverse..."
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Old 05-30-08, 05:54 PM
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1988, easy, filter, fis, fix, housing, leak, leaking, mazda, neck, nut, oil, orings, pedestal, repair, rx7

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