MakoShark77

I bought a chrome waterneck to put on my new polished intake manifold and it came with an o-ring. Anyone tried using this? I'm not sure I want to trust it. It's not a very big o-ring and seems kinda wimpy. I'm not sure it can hold up to the temps and pressure so I thought I would ask if anybody has trusted/tried one before???

70Donnybrooke

It will be fine. Most new autos come with that now. My F-350 uses an O-ring and that sees a lot of temp and pressure. Your car should have a 15 pound radiator cap so that is the most pressure it will see. Plus when you tighten it down the O-ring will squash in the channel and seal.

croaker

I have a chrome one and I've been threatening to replace it I'm on my second one

donnie1956

I used the oring plus permatex high temp gasket material. No leaks so far.

my 76 ray

I found out that my '74 has one when I pulled the engine. It never leaked but I don't know how long it was in there.

snoopykissedlucy

I have used it in the last 3 chevy engines I have built (chrome water necks come with them).

Never had any leaking problems. Just make sure to order a new o-ring when disassembling it later down the road. They dont seal too well once removed and re-installed.

Glassbowtie77

I have an o-ring in my chrome waterneck on my Edelbrock manifold, 3 years so far no leaks.

corvetteload

Try to find one without an O-Ring!!!! I just went through something with a thermostat and housing in my blower intake. The groove for the thermostat was too shallow, this made the thermostat not sit flush but stick out from the intake. I bought one of those polished swivel housings and they have an o-ring, and the o-ring sat right on the edge of the thermostat and the intake, thus not able to seal properly. Luckily Mr Gasket makes this spacer and calls it a "reusable thermostat gasket", it has a large inner pliable gasket that luckily sealed everything together. In the meantime I had a factory housing polished, ready as a backup with gasket in case the o-ring housing leaked.
But anyway, if you buy a chromed steel housing, the housing will eventually warp causing the o-ring to leak, but before that happens the o-ring seals just fine, JUST A SMALL WARNING

MakoShark77

Thanks for replies, guys. I guess I'll give it go and see what happens. It is a steel waterneck so I hope it doesn't warp. That o-ring is only about a 1/8inch thick and my first thoughts were that it was a little small to do the job. I'll try it and if it fails I've got a tube of RTV on standby!

corvetteload

The theory behind the o-ring is that is is reusable, unlike the gasket type
Stay away from RTV, never looks good squished out from under housing, try this first:
http://www.autozone.com/autozone/par...ntifier=328712

MakoShark77

I like the looks of that. Thanks.

corvetteload

I got mine at Pep Boys, used it with this neck:
http://www.jegs.com/i/Trans-Dapt/969...ductId=1257412
If your thermostat sits flush with the intake, you won't need that, o-ring will be sufficient. I needed that due to thermostat sitting high in intake. Heres pics:


You can see spacer between neck and manifold.