LML 16 LML w rear main leaking and already tuned

[cdbright]

So it seems my rear main is leaking (3-4 drops a night), i changed oil this weekend and cleaned it good and it seems to be between oil pan and trans, i guess it could be rear of pan gasket but i doubt i am that lucky, and since it has EFI and all deleted what are my chances of getting any warranty, just rolled over 41K for miles. What are the chances it is a different leak and just ending up there looking like a rear main seal?

 

[coker6365]

Try snugging up the pan bolts. LML's are very common to leaking pan gaskets and it will seep from the bell housing. Most times there will be bolts that are a little loose and may or may not seal up.

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[kiwilml]

What he said ^^

I bought my lml last year with 21k miles on it and when I went to put an exhaust on a few days later I noticed oil leaking from that spot too. Checked the pan bolts and sure enough, they was lose and that stopped my leak snugging them up a bit.

Hope your that lucky

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[Chevy1925]

Yeah I put money it’s the upper pan leaking. I would rather it be a rear main, the upper pan sucks to do. Seen lots of lmm’s do the same. Seems the mid plate and block have a good little lip where the pan is suppose to seal and not enough sealant there.

That’s just on the couple I’ve dicked with though

 

[cdbright]

What he said ^^

I bought my lml last year with 21k miles on it and when I went to put an exhaust on a few days later I noticed oil leaking from that spot too. Checked the pan bolts and sure enough, they was lose and that stopped my leak snugging them up a bit.

Hope your that lucky

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It was your LOWER pan seal ?

 

[kiwilml]

It was your LOWER pan seal ?

Yes that's what mine was. Took 5 minutes to tighten all the bolts up a bit and pretty much totally stopped the leak.

I've since had it off for my compound turbo kit install and so it's got a new seal now.

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[cdbright]

UPDATE ---- that seemed to be the issue. All the rear 8-9 bolts took at least a half turn and it seemed to be the ticket , thanks for the advice fellas

 

[Mike L.]

Very rare to see a rear main leak in a Duramax.