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Old 03-29-2010, 04:06 PM   #1
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Default Engine rear main seal

Hey guys,

I'm going to be doing my clutch this coming weekend. Is this what I need to do my rear main seal? Should I be using a genuine Mazda part? Thanks

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Old 03-29-2010, 04:13 PM   #2
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I personally prefer Mazda parts for seals like that.
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Old 03-29-2010, 07:31 PM   #3
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I would...wait I did this past weekend.
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Old 03-29-2010, 07:38 PM   #4
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Yep I would use the factory seal, or in a pinch, a known good brand like Felpro or the like.

The rear main seal is an easy job BTW. The rear main cap does not even have to be loosened. The usual precautions about driving in a seal still apply.
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Old 03-29-2010, 11:18 PM   #5
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Alright, I'll get one from Mazda. Thanks.
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Old 04-27-2010, 02:28 PM   #6
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Hijacking this as I'm going to be doing my clutch in the next few weeks

Is there any merit to "if it's not leaking leave it alone" ?

It's not the cost or time its making sure the new one goes in fine and does a better job that the one thats presently not leaking.

If I proceed with the new seal I dont want to nick any surfaces while taking the old one out. Is the screw method still the best if your careful ?
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Old 04-27-2010, 02:33 PM   #7
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Replace it while you're in there.

Comes out easy with dental picks.

Put some oild in ziploc and "roll" new seal through oil before install. Leave in baggie until ready to avoid picking up dirt.

Tap in with old seal on top, with flat board on top of that.
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Old 04-27-2010, 02:34 PM   #8
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Unless your name is Braineak and you derive a sick satisfaction from dropping trannies, you should do the seal regardless of leak status. The biggest mistake people make is pushing the new seal in too far. There is a great writeup in the m.net garage... I believe it specifically says the seal just needs to be flush with the rear face of the block, or maybe inset like 1mm, but no farther. Read up. Be sure to dab a little oil around the edget before pushing it in place, and push slowly and evenly so it doesn't get even the littlest big ****-eyed.
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Old 04-27-2010, 02:36 PM   #9
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This came up as I helped a friend do a clutch job on his 90 which was the 1st clutch job for both of us.

I saw the seal, and so I dont need to touch anything else - as in the half moon part that is permatexed on ?

Also looking in his bellhousing the front tranny seal is behind that cap the is bolted on ?? Is it the same basic design for the 6 spd ?

Thanks again!!

" push in too far"

ps - lets just say I pushed in my crank seal to far on my CRF450R bike and that was a waste of a $30 seal as pulling it back destroyed it - wahh, I dont want to do that again !
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Old 04-27-2010, 03:19 PM   #10
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Use the ziploc bag technique to soak in oil then proceed to install it. I let mine sit in a ziploc with rotella for a week before i did my seal and clutch...
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Old 04-27-2010, 03:21 PM   #11
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ziploc - what about a little olive oil and basil ?
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Old 04-27-2010, 05:04 PM   #12
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Quote:
Originally Posted by Landrew View Post
ziploc - what about a little olive oil and basil ?
Olive oil and rosemary if it's going on a salad.
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Old 04-27-2010, 05:06 PM   #13
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mmm instead of low mein salad you have rear main salad.
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Old 04-27-2010, 11:21 PM   #14
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I let mine soak in the juices left over from mulched up chickens. It works great and gives off a great country fried chicken smell once the car warms up.
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