is this ok?
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Freshman User
Joined: Nov 2007
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is this ok?
now i have a rear main seal leak, its not that bad at all maybe one drop on my garage floor a week. but they will not pass my inspection so i have to fix it. would it be ok to rtv it I don't want to pull everything off just for a little leak like that? if it was worse I would do it.
Elder User
Joined: Sep 2003
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Well...what would you rtv...?
If the leak is coming from the rear main seal, the only fix would be to drop the pan, and most likely pull the trans and crank and replace it.
No rtv is going to "fix" it. you could seal the bellhousing up i guess with the rtv so that nothing drips out but it's just going to trap the oil in the bellhousing, which would be pretty bad if you have a manual trans.
If the leak is coming from the rear main seal, the only fix would be to drop the pan, and most likely pull the trans and crank and replace it.
No rtv is going to "fix" it. you could seal the bellhousing up i guess with the rtv so that nothing drips out but it's just going to trap the oil in the bellhousing, which would be pretty bad if you have a manual trans.
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Freshman User
Joined: Nov 2007
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the leak isnt coming from inside the bellhousing, instead on the cover right at the engine could that then be the oil pan gasket? on my mustang the rear main was coming out of the bellhousing like you said
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
Let me get this straight. Your truck won't pass inspection because it gets one drop of oil on the ground each week? What vehicle doesn't do that? And how do they know that it does it, if it only does it once a week or so?
Sorry, I just find that a little hard to take in. Anyway, if this really is something you have to take care of, RTV unfortunately isn't going to solve your problem and everything RJR99SS said is dead-on. RTV and oil don't mix. RTV is good for sealing up oil pan gaskets, but if you try caking RTV around a leak, it will just smear off.
I would add, too, that the oil pressure sending unit on a 351M\400 sits on the back of the block behind the intake manifold. Sometimes when they leak, the oil drips down the bellhousing and off the cover, making it look like a rear main seal leak. Sometimes that's the case.
Sorry, I just find that a little hard to take in. Anyway, if this really is something you have to take care of, RTV unfortunately isn't going to solve your problem and everything RJR99SS said is dead-on. RTV and oil don't mix. RTV is good for sealing up oil pan gaskets, but if you try caking RTV around a leak, it will just smear off.
I would add, too, that the oil pressure sending unit on a 351M\400 sits on the back of the block behind the intake manifold. Sometimes when they leak, the oil drips down the bellhousing and off the cover, making it look like a rear main seal leak. Sometimes that's the case.
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Freshman User
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ya i'm gonna have to change that anyway, no oil pressure, ha and power wash all the grime and crap off i just wanna get it registerd drive it till it dies then new motor thanks for the help guys
