Not tractor related but it is engine related

steve-in-ga · Aug 20, 2020

I have an 02 dodge with a 5.9L 24 valve cummins. The rear and front seals are leaking. I'm not in a position to replace them right now. I was thinking of using some of that oil stop leak. Anyone have any experience with these types of products? Do they work? Do they do more harm than good? I don't know if the oil pan gasket is rubber or not and wonder if it would swell that gasket to the point it would start leaking.

timcasbolt · Aug 20, 2020

(quoted from post at 15:36:04 08/20/20) I have an 02 dodge with a 5.9L 24 valve cummins. The rear and front seals are leaking. I'm not in a position to replace them right now. I was thinking of using some of that oil stop leak. Anyone have any experience with these types of products? Do they work? Do they do more harm than good? I don't know if the oil pan gasket is rubber or not and wonder if it would swell that gasket to the point it would start leaking.

ou could try tightening up all the related bolts and nuts.

rustred · Aug 20, 2020

seal replacement is the ticket. you can put anything you want in the oil and i can tell you the leak will not stop. a leak is a leak. some junk might swell the seal to stop it for a very short time but after that its totally screwed.
you could try that viscosity improver it might slow it down ,?

Billy Shafer · Aug 20, 2020

Do they work. Depends on where the leak is.And how bad it is. They might work for a short time. Or long enough to get you to a shop. But the problem needs to be fixed.

wilson ind · Aug 20, 2020

Make sure the engine can so to speak breath. Check for plugged crank ventilation system>

Steve@Advance · Aug 20, 2020

I've had good success with it in power steering, but not so much with engines.

But I don't think it will hurt to try.

A lot depends on why it's leaking. If it is main seals (and other things can leak in the vicinity and look like main seals), sometimes main seals are a symptom rather than a cause. Loose bearings, excess blow by, over filled (contaminated with diesel?) will contribute.

How is the oil pressure?

Something you can try, if you are the only driver and can keep a close watch, run the oil a quart or 2 low. I've seen tired engines that would hemorrhage oil if kept full, but almost completely stop if run a little low.

used red MN · Aug 20, 2020

Sorry, but like others I am not a believer in engine oil stop leak potions. Maybe you are aware, but the rear main seal is the full circle style so the trans/clutch/flywheel have to come out or at least back enough to allow room to perform the operation. See the RockAuto link for an example, it drives into a removable aluminum housing. I can’t remember if the oil pan gasket is just a paper gasket or if it is the thin tin style with gasket material bonded to each side. If the seals are your problem the oil pan won’t need to come off any way just a couple of the rear bolts that screw into the seal housing.
5.9 Cummins rear main example

jimg.allentown · Aug 20, 2020

Those "mechanic in a can" potions generally do more harm than good.

There is NO SUBSTITUTE for repairing the problem. Spending a lot of time trying to skate around it is just a waste of your time, money, and resources.

Always keep in mind that stop leak materials are intended to stop the flow of oil from that leak. The problem is that the goop doesn't know which "leaks" are necessary to lubricate moving parts and which need to be stopped. The usual result is curtailing oil flow where it might be needed.

In short, fix the problem and quit trying to skate around it with canned gook.

SVcummins · Aug 21, 2020

Find some 15 50 mystic that will help slow down the leaks until you can fix it. The seal swellers and other magic potions work for awhile then the seals shrink again and it leaks worse than before

mark1955 · Aug 21, 2020

I think if both seals started leaking at same time, maybe a vent problem, somewhere, also could be contaminated oil,(water, fuel, overfilling), main bearings, maybe. I have heard of squirting brake fluid on seals, can swell them out enough to stop leak for a while, long enough to get replaced, maybe. if it is a standard transmission, I would think it would be slipping by now. mark55

derwen1959 · Aug 21, 2020

I am in uk and this will be no use to you ... I unexpectedly stopped the rear crankseal leaking on my
Dexta leaking when I topped it up with Fuchs HDX 30

SVcummins · Aug 21, 2020

Are you sure its not the pushrod cover

Not tractor related but it is engine related

steve-in-ga

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timcasbolt

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rustred

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Billy Shafer

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wilson ind

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Steve@Advance

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used red MN

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jimg.allentown

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SVcummins

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mark1955

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derwen1959

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SVcummins

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