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Rear balance shaft seal leaking/timing belt offset

 
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Old 12-08-2012, 02:28 PM
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Rear balance shaft seal leaking/timing belt offset

As you can tell by the title, there are two problems I'm having that I've lumped into one thread: 1. the rear balance shaft seal is leaking and 2. my timing belt (just replaced 4 weeks ago) is running off the cams about 1/4"

I've been having an oil leak running down the left side of the oil pan for several weeks now, and seemingly got worse after I did an entire job under there (timing and balance shaft belts, both accessory belts, camshaft seals, front main seal, front balance shaft seal/retainer, KZ manual tensioner, water pump). I took it apart this morning, and isolated the oil leak to the rear balance shaft. The only issue is that there is so much oil all around the housing (picture is not mine, but gives the idea of where the leak is):


But the oil is not only all around the housing, but also behind the gear. Which would make me think that the seal around the shaft is also leaking. Unfortunately what I've heard is that Honda made that seal non-serviceable, which means the whole housing costs about $260.

My question is this: what are the chances that the o-ring around the housing is actually getting oil on the gear also? It doesn't seem to me that it should get anywhere near the gear. I don't want to replace the o-ring and put it all back together due to it still leaking.

Secondly, the timing belt has been running 1/4" off the side of the cams since it has been installed (see attachment). When I put it together it wasn't too bad (maybe an 1/8"). It's not causing any "problems", and its not rubbing anywhere, but it's worrying me. The only thing i can see to cause that is a problem with the water pump I put on since that's where the timing belt tensioner mounts. It seems to match the original, but I don't know what could be the problem.
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Old 12-08-2012, 04:45 PM
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Re: Rear balance shaft seal leaking/timing belt offset

check the bottom left of this post. there are other threads discussing this that ended finding solutions to your dilema. something or other is out of alignment causing the t belt issue.
not sure about the oil leak but am rather sure somebody here has covered that too.

search baby search.
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Old 12-10-2012, 03:44 PM
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Re: Rear balance shaft seal leaking/timing belt offset

I did search, and have searched for several days on the issue and did not find what I was looking for. They all have similar problems, but I was looking for a specific answer. I'm not one who just asks questions because I'm too lazy to do my own work in searching. I have seen the answers to the posts down below, and they are not the same problem as I am having, therefore I began a new thread. I was more interested in a useful answer, and something that could help someone in the future who needs help for the same issue.

Therefore for those of you actually wanting help, here is what I found out:

1. The timing belt is still only slightly off the cam (less than 1/8th inch) and it was (I admit my own forgetfulness) simply because I had not tightened the tensioner pulley mounting bolt (since it has to be loose to adjust the tension with the manual tensioner). This was allowing the tensioner pulley to angle off center a little bit, leading the belt off center of the cams. I tightened it, and it looks pretty good now. Nothing is bent or misaligned.

2. The oil leak from the rear shaft I believe was due to the o-ring around the housing. When I took it off it broke into several pieces because it was more of a hard plastic (very brittle) than a soft rubber. I bought a new seal for $8 from Honda, and sealed it with some gasket sealer and we should be fine now. (Though I have not confirmed it yet).

If anyone has any questions, let me know. Thanks!
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Old 02-17-2015, 02:26 PM
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Re: Rear balance shaft seal leaking/timing belt offset

So I know this is an old thread but it seems like this is a similar issue to what I'm having now. I have a JDM H22a that I swapped into my 98 Prelude that was quoted as 49,000 miles and I have about 1500 miles since the swap. My rear balance shaft also started leaking but it wasn't gradual, it was just one day at my dad's I started it up and it made a noise, later found out to be the balance shaft belt because the rear balance shaft seized. I always maintained the oil level, never really used much since the swap, and the level was only a little low after I found the puddle but the shaft no longer turns freely, wont move at all. I was wondering if its ok to just fix the o-ring and leave the belt off, or if there is a possibility that this could cause other oil related issues? I plan on doing a full oil change anyways after this in case there is metal in the oil and install an oil pressure gauge. Any help greatly appreciated
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Old 02-17-2015, 03:14 PM
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Re: Rear balance shaft seal leaking/timing belt offset

I'm not sure if it would cause any ISSUES to leave the belt off, but if you search for "balance shaft delete" you will find many guys and several kits to do this modification. It reduces weight and complexity in the engine.

As far as the leak goes, that o-ring fixed mine. But your problem sounds like something more serious. If you say that it actually made an audible sound and now the shaft is seized up I would think that there are some more serious issues in there.
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Old 02-18-2015, 10:02 AM
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Re: Rear balance shaft seal leaking/timing belt offset

Thanks for the reply! So the noise was the gear grinding away the belt since it froze up. I'm just concerned as to why it froze in the first place being lack of oil and if that would cause oil issues else where, ie shared oil passages? From what I can tell it should be fine so long as I do a good oil change and I'm also putting in a pressure gauge to keep an eye on it

Last edited by My98Lude; 02-18-2015 at 02:50 PM.
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