PS Pump still leaking!

[pmesfun]

I replaced the o-ring that I thought was leaking and put some RTV to make sure it never leaks again. Went to start the car and its STILL leaking. Turns out it the front seal for the shaft, which I already replaced. Is there some special RTV to use on this seal, so it will stop leaking for sure?

[pmesfun]

Any special RTV?

That's what I've been using.

[71Corolla]

It's possible the shaft itself has a groove in it, or is damaged. You can't put sealant there because of the rotation. Are you certain it is leaking from the seal? Or unless you mean put RTV on the outer edges of the seal?

The RTV you are using is fine.

[pmesfun]

Originally Posted by 71Corolla

It's possible the shaft itself has a groove in it, or is damaged. You can't put sealant there because of the rotation. Are you certain it is leaking from the seal? Or unless you mean put RTV on the outer edges of the seal?

That is what Gary(toyotapartsman) said. I guess it is damaged then because I replaced everything, and that seal included. I can actually see it dripping immediately after I refill the pump and when the car is on. Yeah, I would want to put rtv anywhere that isn't moving. Planning on replacing the seal and if it still leaks, then I'll have to replace the shaft.

[71Corolla]

If you can, pull the pump apart and inspect it. If the shaft is good then what else could it be? I would hit a salvage yard. I would imagine in your area you have many choices.

[pmesfun]

Why it was leaking...


Yes, I know...FAIL.
The seal I got this time seems a little different, more rubber that metal?


I am going to order a rebuilt kit again, and buy the shaft. There are two groves on it.. I guess somehow I broke that metal o-ring. What places would I be safe to apply RTV?

[Mister_Perkins]

I'de put it on the outside if anything because the shaft will be spinning and wouldn't do anything on the inside

[71Corolla]

You could put RTV on the outside, but there is no sealant there from the factory so I don't see why it would be needed.

[pmesfun]

I just want it to never leak AGAIN. Called the dealer, gasket kit is in stock, shaft needs to be ordered. I will be calling the other dealer tomorrow.

[Mister_Perkins]

if the shaft is within spec as far as OD, theres no reason it should leak unless the seal is driven in incorrectly

[pmesfun]

I thought it can still leak from the grooves on the shaft? I just don't want to take a chance again, actually get tired of working on the car.

[JohnGD]

As mentioned, only on the outside.

ATF attacks RTV, and if applied on the inside can cause it to come loose into the system and plug up something. That's a reason why ATF pan gaskets are cork-rubber or all-rubber.

Originally Posted by pmesfun

What places would I be safe to apply RTV?

[pmesfun]

Originally Posted by JohnGD

As mentioned, only on the outside.

ATF attacks RTV, and if applied on the inside can cause it to come loose into the system and plug up something. That's a reason why ATF pan gaskets are cork-rubber or all-rubber.

So basically what you are saying is not to put any RTV because if theirs a leak, the RTV will be eaten away?

[JohnGD]

No need for RTV. The seals and gaskets should properly seal the system. Please torque properly using a torque wrench.

(this is also a perfect example why oil seals should be replaced when doing the timing belt at 5-year/60K miles ).

Originally Posted by pmesfun

So basically what you are saying is not to put any RTV because if theirs a leak, the RTV will be eaten away?

[71Corolla]

RTV is commonly used in automatic transmissions and differentials. Permatex makes a version specifically designed to be resistant to ATF, although I can't see it being much different than the other RTV's out there.

But I agree, there is no RTV from the factory so it is not needed.