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Old 08-09-2019, 11:50 AM   #1
DannL
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Default Lucas No Leak . . .

Has anyone used the Lucas No Leak product with any success stopping minor engine leaks? Curios in OKC.
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Old 08-09-2019, 05:46 PM   #2
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Default Re: Lucas No Leak . . .

What leaks are you talking about!?
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Old 08-09-2019, 06:28 PM   #3
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Default Re: Lucas No Leak . . .

That stuff probbly works by softening old hard neroprene oil seals. The Model A has no oil such seals.
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Old 08-09-2019, 09:42 PM   #4
DannL
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Default Re: Lucas No Leak . . .

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Originally Posted by Gary WA View Post
What leaks are you talking about!?

The engine leaks that are leaving oil on the concrete.


Primarily between the clutch assembly and engine (I think) which I suspect is a main that is leaking some.

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Old 08-09-2019, 10:16 PM   #5
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Default Re: Lucas No Leak . . .

DannL I would check the main caps especially the rear and center mains. It is probably time to remove a couple of thousands of shims. This worked for my 1931 Coupe. Good Luck

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Old 08-10-2019, 12:06 AM   #6
40 Deluxe
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Default Re: Lucas No Leak . . .

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Quote:
Originally Posted by DannL View Post
Has anyone used the Lucas No Leak product with any success stopping minor engine leaks? Curios in OKC.
Since there is no actual "seal" at the rear main, no type of mouse milk will help. Oil that finds its way to the back of the rear main drains back into the pan through a hole in the bearing cap. The slinger on the crank flings any oil that gets on it into the groove in the block and cap, but the slinger does not touch any part of that groove.
There is always a little oil weeping out past this "labyrinth", so backyard engineers are continually trying to "improve" the original design (with mixed results!).
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Old 08-10-2019, 12:16 AM   #7
DannL
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Default Re: Lucas No Leak . . .

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Originally Posted by 40 Deluxe View Post
Since there is no actual "seal" at the rear main, no type of mouse milk will help. Oil that finds its way to the back of the rear main drains back into the pan through a hole in the bearing cap. The slinger on the crank flings any oil that gets on it into the groove in the block and cap, but the slinger does not touch any part of that groove.
There is always a little oil weeping out past this "labyrinth", so backyard engineers are continually trying to "improve" the original design (with mixed results!).

That sounds right. Saw a video this evening where that end cap was shown.
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Old 08-10-2019, 07:19 AM   #8
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Default Re: Lucas No Leak . . .

It's kinda like we use to say about our old Harleys..."you can tell when it needs oil when there is not a drip spot where you parked it." Chap
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