Water neck seal: Silicone or gasket, or both - The 1947 - Present Chevrolet & GMC Truck Message Board Network

D-Day · 12-25-2007, 02:24 AM

Well, due to a rusty and pitted water neck, I replaced it with a chrome aftermarket one near two months ago, picked up a new gasket, and replaced it and yadda yadda. Well, even though it was cranked down tighter than snot (though not too tight due to aluminum Edelbrock manifold), it leaked ever so slightly; through the gasket. Apparently I forgot to use some kind of sealant with the gasket.

So, I have a new gasket and some water neck silicone seal, and the question is, can I use both, or should I just use the silicone? This leak is really annoying.

NEVERENOUGH · 12-25-2007, 03:12 AM

Take your water neck and hit it on the wire wheel of your bench grinder. Rough up the surface of the neck and you should have no more leaks.

xtreme80 · 12-25-2007, 06:54 AM

In addition to the reply above mine, yes you can use both. I am.

wedgemon · 12-25-2007, 09:53 AM

I switched to an O-Ring style last year. No leaks at all.

- Dave

BLE 'BURBAN · 12-25-2007, 10:18 AM

Chromed parts retain loads of heat and heat eventually will cause those chromed water outlets to warp. Then no amount of gaskets or sealants will keep them from leaking.

D-Day · 12-25-2007, 11:30 AM

Thing of it is, it leaked 5 minutes after I put it on. The surface of the neck and the manifold are just too flat/smooth to make a seal; no grooves like with the stock/steel one (neck or manifold).

I didn't think to get an o-ring; perhaps I'll ask when I pick up my Holley choke cable tomorrow. If not, then I'll scratch up the water neck, and use the silicone and gasket.

Prong · 12-25-2007, 11:52 AM

Quote:

Originally Posted by wedgemon

I switched to an O-Ring style last year. No leaks at all.

- Dave

+ 1

Even though those gaskets are $5, they're worth every penny to me.

Srubydo1986 · 12-25-2007, 07:20 PM

I used a plastic rubber gasket from autozone. look up one for a 89 jimmy that should be right used on my 86 (same style just different materal and its reuseable) ill see i f i can find a part number for u (ok part number is 35562T Pricing: $7.99 should be the one im talking about. it on a eldelbrock intake should solve ur problem)

D-Day · 12-25-2007, 09:11 PM

Hey, thanks. I appreciate it.

63 & 64 Bowties · 12-26-2007, 04:13 AM

Quote:

Originally Posted by wedgemon

I switched to an O-Ring style last year. No leaks at all.

- Dave

+2 they're great

Quote:

Originally Posted by D-Day

I didn't think to get an o-ring; perhaps I'll ask when I pick up my Holley choke cable tomorrow. If not, then I'll scratch up the water neck, and use the silicone and gasket.

You can't just get an o-ring, the neck has to be designed for an o-ring. It needs the o-ring groove in it.

D-Day · 12-26-2007, 05:09 AM

I think mine has that. I'll double check. Thanks for the heads up.

12-25-2007, 02:24 AM	#1
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Water neck seal: Silicone or gasket, or both Well, due to a rusty and pitted water neck, I replaced it with a chrome aftermarket one near two months ago, picked up a new gasket, and replaced it and yadda yadda. Well, even though it was cranked down tighter than snot (though not too tight due to aluminum Edelbrock manifold), it leaked ever so slightly; through the gasket. Apparently I forgot to use some kind of sealant with the gasket. So, I have a new gasket and some water neck silicone seal, and the question is, can I use both, or should I just use the silicone? This leak is really annoying.

12-25-2007, 03:12 AM	#2
NEVERENOUGH Registered User Join Date: Jul 2004 Location: Chino Valley Az Posts: 210	Re: Water neck seal: Silicone or gasket, or both Take your water neck and hit it on the wire wheel of your bench grinder. Rough up the surface of the neck and you should have no more leaks.

12-25-2007, 06:54 AM	#3
xtreme80 Wishin' I had more money! Join Date: Feb 2007 Location: Eugene, OR Posts: 1,242	Re: Water neck seal: Silicone or gasket, or both In addition to the reply above mine, yes you can use both. I am.

12-25-2007, 09:53 AM	#4
wedgemon Registered User Join Date: Jul 2004 Location: Spanish Springs, NV Posts: 1,171	Re: Water neck seal: Silicone or gasket, or both I switched to an O-Ring style last year. No leaks at all. - Dave __________________ 2003 Silverado K1500 Z71 - Arrival Blue 1973 K5 Cheyenne Blazer 350/TH350/NP203 Kids Trucks:92 K1500 Blazer 5.7/700R4 4" lift. RETIRED: 1980 Scottsdale 4x4 Founding Member: "TILT WHEEL BELLY." Club

12-25-2007, 10:18 AM	#5
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: Water neck seal: Silicone or gasket, or both Chromed parts retain loads of heat and heat eventually will cause those chromed water outlets to warp. Then no amount of gaskets or sealants will keep them from leaking. __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade

12-25-2007, 11:30 AM	#6
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Water neck seal: Silicone or gasket, or both Thing of it is, it leaked 5 minutes after I put it on. The surface of the neck and the manifold are just too flat/smooth to make a seal; no grooves like with the stock/steel one (neck or manifold). I didn't think to get an o-ring; perhaps I'll ask when I pick up my Holley choke cable tomorrow. If not, then I'll scratch up the water neck, and use the silicone and gasket. Last edited by D-Day; 12-25-2007 at 11:31 AM.

12-25-2007, 07:20 PM	#8
Srubydo1986 The Crazy Machanic Join Date: Jan 2007 Location: Nokesville Va Posts: 1,437	Re: Water neck seal: Silicone or gasket, or both I used a plastic rubber gasket from autozone. look up one for a 89 jimmy that should be right used on my 86 (same style just different materal and its reuseable) ill see i f i can find a part number for u (ok part number is 35562T Pricing: $7.99 should be the one im talking about. it on a eldelbrock intake should solve ur problem) __________________ 1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) 1970 chevelle 2dr sedan Latest update June 24 2007. 1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad) newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one Last edited by Srubydo1986; 12-25-2007 at 07:25 PM.*

12-25-2007, 09:11 PM	#9
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Water neck seal: Silicone or gasket, or both Hey, thanks. I appreciate it.

12-26-2007, 05:09 AM	#11
D-Day Live fast, die young Join Date: Sep 2006 Location: Northwest Ohio Posts: 293	Re: Water neck seal: Silicone or gasket, or both I think mine has that. I'll double check. Thanks for the heads up.

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