Thermostat housing leak

I have a chrome housing. I am using gaskets and sealeant to seal it. It will seal for several months and then start leaking agn. I just look at an AK catalog and see the chrome model has an O-ring type seal.

Im not sure if the one on my car has this type seal and I been using the wrong stuff to seal it.
I am/was not familiar w/ this type of O-ring setup. I was out of the car hobby for decades and I don't recall them existing then.
Anyway, I was doing some cosmetic work on the car today. I wud have gone to a car show and wud have had to deal w/ leaking coolant if it had not been my wifes birthday and had dinner reservations. I gess/know I was lucky; I did'nt get on the freeway and discover the leak. I thought I had the problem fixed a few months when I put on a new coolant pump. Guess not.
I plan to remove the housing tommorrow and see if it takes an O-ring and if it don't - may/probably go w/ the gasket type. Tired of fixin the same leak.
Any thoughts/suggestion?

 

The chrome ones are always a pia to seal, I always made sure that the chrome was not on the sealing surfaces by sanding it off, o ring type are not much better if any. I just use a stock housing

 

He's right the O-ring chrome ones arn't any better I removed mine too.

 

tossed mine in the can also...

 

I disagree. The O-ring versions work quite well.

But yeah, the regular chrome waternecks are junk.

 

Thanks for the heads-up guys. Im removing it tommorrow and going w/ what I used in the past and painting it like the rest of the engine, blue, cept for the mating surface. The last time I "called myself fixing it" was the 3rd time. Three times is 3 times to many... gettin ride of the POS housing. It was on the car when/since I've owned it.

 

Never used a chrome one myself but a lot of people have said to stay away from them.

 

Trashed mine also..

 

I trashed my leaky chrome one to.... I bought a good one from a mustang house and it's perfect now...

 

I sand blasted mine, removed the chrome and painted it, I've never had a leak.

 

X 2 on this fix. It's not the seal surface itself, but the chrome that's the problem, it's too slick to get a seal with. Sand it off and it's good to go.

 

...so you didn't have a chrome one...

 

It was chrome at one time, I like the design, not the chrome.

 

I have the same problem with a plain aluminum one on my car. Water is all drained out now, so what can I do before I fill it up to make it stop leaking?

Slow leak, but there is a puddle above the water pump when I let it sit for a while.

Mine is the straight up 5.0 one, but same issue. I assume the same fix.

 

You sure it's coming from the T-Stat housing ? And not the timing cover ?