Ralph77

So looks like the next 3 days will be rain free and was thinking I would get around to replacing my water pump.
Also going to do the thermostat housing gasket.
So instead of using the gasket that came with the water pump from Napa I decided to go with a FelPro one.
Same for the thermostat housing. Decided to replace the thermostat housing too.
Also bought a new black tube.
I might replace the thermostat. I bought a new Stant Superstat.
Funny thing is that the one in there is a cheaper Napa one. Been in there about 6 years now.
Works fine. Which I think is kind of funny considering some of the horror stories I have read about people having problems with them here and there.
Forgot who but I think I read that somebody bought 4 thermostats, each one being defective, and finally the 5th one worked.

So I have a handle on the water pump install.

Thinking I would take a blue (aluminum) cookie with my die grinder to give it a final clean after scraping most of the old stuff off.

So wonder what you guys think about that?

But my real question is about using some RTV. This:

https://www.napaonline.com/en/p/BK_7653017

My buddy is all about using this stuff. On the block. On the water pump. Everywhere.
I was thinking more a thin layer on the block just to maybe smooth out the mating surface of the minor imperfections I expect to find.

Thing is FelPro is very adamant about not using any kind of stuff. Constantly stating it on their website.

So what do you guys think about this also?

Something else I wanted to ask.
The red thread sealant on the black tube I bought is mostly worn off. Brand new. Figured no big deal.
Was thinking teflon tape, for the temp sensor too, but I also have some of this from when I put those fittings on my oil filter adapter to make it easier to hook up a mechanical gauge without removing the sensor.

https://www.napaonline.com/en/p/BK_7651155

Since I have both already which way would you go?

kjc

I replaced the water pump on my '93 Grand Cherokee this weekend.. I very carefully applied permatex ultra black to the supplied gasket, stuck it on the block, repeated on the pump itself, stuck it on and applied bolts finger tight. Let it set a while while I started to reattach other stuff. I looked at my manual to see the next step and it said the gasket goes on dry. Too late says I!! I ain't scrapin' off that gooey stuff. Torqued down the bolts (22ft pounds) and called it good. Turned out ok.. no leaks, no "burping air" stuff and again NO LEAKS!
I too bought the inlet pipe, stant thermostat and housing. I used the new pipe, just cause, but left the thermo and cover in the box.. save 'em for next time The power steering pump pulley is the belt tensioner?? PITA! Good luck with your project!

Dave51

I had been using Permatex Form-A-Gasket 2B but recently when I had to do some work on my outboard tried Hylomar #61311. It is a gasket "dressing" as opposed to a "sealant" (i.e., enhances contact of otherwise well-mated surfaces. Not to be used for voids).

IMO RTV sealants are good for stuff like differential covers and transmission pans, but stuff like water pumps and head gaskets would benefit from Hylomar.

BlueRidgeMark

Hmmm....

Well, what are the choices here?

1. The advice of the manufacturer, with decades of experience in making gaskets, millions spent on engineering studies, staffed with mechanical and chemical engineers who have nothing better to do than design and test their products, plus the collective feedback from millions of installations of their products..
2. Scuttlebutt on the Internet, basically the collective "wisdom" of a bunch of people who have no idea what they are doing.

This is a tough one. I don't know what to tell you!

Dave51

My point exactly when we were talking about Fram oil filters!!

cruiser54

I use Gasca-Cinch or 2B mostly to hold the gasket in place during assembly.

I once built a Nissan Patrol engine using factory gaskets, including those side cover ones, with nothing but wheel bearing grease smeared on them

Never leaked.

Ralph77

That is why I am leaning towards maybe, at most, a thin film on the block depending what it looks like when I have it all apart.

What about thread sealant or telfon tape for the black tube and the sensor. See how I have both in "stock". LOL.

cruiser54

Permatex #2 in both applications.

cruiser54

I like this stuff also.

https://www.napaonline.com/en/p/BK_7651229

Ralph77

Thread sealant it is.

Indian Head. Old School. I like it. Never used it but know about it. The way I hear it never get anything apart again using that. LOL.

cruiser54

Somebody'd blowin smoke if they're telling you that.

GascaCinch is the bomb. Comes apart easily if necessary. No scraper needed.

Ralph77

My old store manager at the Napa told me that. His father used that on everything he used to say.

OOPS!!

Beerislooov

Czemu tutaj pokazuje sie wegierskie forum?

Why is the Hungarian forum shown here?

Ralph77

On the first try. Am I a lucky SOB or what?

fb97xj1

You should not need anything other than a gasket. If you want to use RTV just because, go paper thin so you it does not squeeze it out into the coolant. A little RTV goes a long way when used properly. Let it set up a bit before adding coolant. As a general rule, if the FSM does not mention it, i do not use it.