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Old 10-11-2018, 03:36 PM   #1
Rat
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Major Oil Leak

So I just replaced the head on my 92 EX. It runs amazing and idles smoother than any cb7 I've owned. But I have an issue. While it's running it leaks a very large amount of oil. From what I can tell it is coming from the timing belt side of engine more towards the front end of the car. I haven't had a chance to get under the car and see what is causing the leak yet. It doesn't look like it's coming from the head but I could be wrong. Does anyone have any idea what I could have forgotten that is causing this?
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Old 10-11-2018, 04:09 PM   #2
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Did you do the timing and balance shaft belts while you had it apart? Replace the cam, crank, and balance shaft seals? The most likely culprit is the forward balance shaft seal; they have a tendency to pop out and create a large leak. There is a retainer that can be added to keep the seal in place. The balance shaft seal retainer is part number 06923-P0A-306
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Last edited by fleetw00d; 10-11-2018 at 04:15 PM.
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Old 10-11-2018, 05:38 PM   #3
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Now that I think about it, I might not have actually even tightened it. Assuming it is what I think it is. How may ft pounds does it need to be?
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Old 10-13-2018, 10:40 AM   #4
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It appears I was thinking of something else entirely. Im assuming this is what needed to be replaced. I kinda put it back in place already but it was completely loose. Can someone please verify that it was in fact this part that needs replacing?
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Old 10-13-2018, 12:31 PM   #5
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I've had this issue before. Balancer shaft seal. Known issue that they will come out after a while. So you need to replace this seal and then I'd invest in a block off plate that they make. Can't remember if they make these for the F series though, they must.

https://www.preludeonline.com/f60/ba...r-clip-292554/
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Old 10-13-2018, 05:20 PM   #6
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Yep that balance shaft seal looks like it popped out for sure. I always removed the balance shaft belt so I never ran into that issue. But just knowing that it is suppose to sit flush with the block. I’d say it’s shot
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Old 10-13-2018, 07:09 PM   #7
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You need new seal and the retainer: 06923-P0A-306

Found a picture in another thread:


Last edited by fleetw00d; 10-13-2018 at 07:18 PM.
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Old 10-13-2018, 11:36 PM   #8
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I managed to get my hands on one today and installed it. Still leaks a tiny bit but not as bad. And I'll tell you what, getting that lower bolt that holds the retainer off was a pain.
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Old 10-14-2018, 07:28 AM   #9
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Did you install a new seal as well?
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Old 10-14-2018, 10:29 AM   #10
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Yes I did.
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