LB7: Issues getting water pump/oil cooler tube to stop leaking

[weazel]

So I've finally got the electronics heading in the right direction on my conversion. Now on to fixing leaks and what not.

I've got one water leak that I cannot get to stop. I've replaced three gaskets already, but still this bastard is leaking. Both mating surfaces are clean as can be but it still leaks.

This spot that's leaking is between the water pump and the oil cooler tube, where there's two studs that bolt the two together.

Any advice is much appreciated as this is driving me crazy!

 

[onebaddmaxxx]

Are you using the factory style metal gasket or aftermarket paper gasket?

 

[custom8726]

So I've finally got the electronics heading in the right direction on my conversion. Now on to fixing leaks and what not.

I've got one water leak that I cannot get to stop. I've replaced three gaskets already, but still this bastard is leaking. Both mating surfaces are clean as can be but it still leaks.

This spot that's leaking is between the water pump and the oil cooler tube, where there's two studs that bolt the two together.

Any advice is much appreciated as this is driving me crazy!

I always use a little gasket maker (the right stuff) (GM) etc on both sides of the gasket but I'm assuming you already tried that?

 

[jlawles2]

straight edge the oil coolant tube waiting flange. I bent one.

 

[weazel]

I used three paper ones, and today picked up a GM metal one. It still leaked with the metal one.

I have tried using silicone one both sides of the gasket, but still no good. But that was on the paper ones.. I'm attempting that with the metal one now. I'm letting the silicone set overnight this time to see if that'll help.

And if this doesn't work, I am definitely going to straight edge it. Jlawles2, what did you do to correct your issue? Replace the whole tube? Or?
I'm really afraid I've bent mine, but got my fingers are crossed the silicone on metal gasket will work this time...

 

[jlawles2]

Yeah, had to replace it. If you have access to a milling machine, you could probably reface it. Replacing it was a pain. Had to pull the Driver Side Motor mount to get the tube from behind it even though people say it will come out.

Don't forget to get the rubber gasket that goes between the coolant tube and the oil cooler itself. If you have to go to the dealer they are EXPENSIVE. It's a funny size and way overpriced at the dealer, but the local HW store did not have one thick enough.

 

[ikeG]

This can be a pain, as you've experienced. If your last attempt doesn't fix it, I'd purchase a new tube because it would solve it once & for all if its not an issue with the pump itself.

 

[weazel]

Ok, I'm hoping this does fix the issue with using silicone and the metal gasket.

Thanks for all the suggestions guys, I'll find out tonight after work if it'll hold or if I'll be buying a new tube lol.

 

[weazel]

Ok going on 4 hours now with no leaks. Going to see how it holds overnight before I call it good. Thanks for everyone's suggestions and help!

 

[minerigger]

If you you need one I've got a spare

Sent from my SM-G900V using Tapatalk

 

[weazel]

Ok sweet, thank you!