thermastat housing leak!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rodstored-72 · 09-04-2006, 03:38 PM

well i must turn to you professionals again. i have a edelbrock air gap manifold on my 383(350) & i bought i chrome neck from my local autozone. i can't seem to get it to not leak!!! it is really frustrating

anyways i have cleaned it off & tried to put it back on again & i still have a leak!!!
i want to keep it chrome so my engine will look nice. can you guys please tell me what you have done & or tell me some ideas to try to keep it from leaking

i have put gasket maker on both sides of the "rubber" gasket & same result.

any help would be much appreciated.

thanks!!!
rodstored-72

byrd · 09-04-2006, 03:44 PM

I had the same problem, get a chrome one with a O-ring gasket instead and that will fix it right up.

cdowns · 09-04-2006, 03:52 PM

Quote:

Originally Posted by byrd

I had the same problem, get a chrome one with a O-ring gasket instead and that will fix it right up.

exactly the experience i had// those cheapo thermo housings are a waste of money look to be spending $20-$25 for a good problem free oring unit

70-Chevy · 09-04-2006, 03:53 PM

Ive always heard of people have problems with these things but I just put on the neck with the o-ring and a little gasket sealant and it works fine. Best of luck to ya with it.

lilpup69chevy · 09-04-2006, 04:01 PM

heck i used the one with the o ring and a housing gasket as well just don't overtigthen it and i never had any leaks, a little gasket sealant goes a long ways lol

tom71 · 09-04-2006, 04:03 PM

the chrome keeps it from sealing correctly if you scuff the chrome where the gasket sits you mite have better luck .

QKENUF4U · 09-04-2006, 04:27 PM

had a chrome one on mine for a 1000 or so miles and replaced it last week casue it was leaking (pretty much from day one) and the chrome was bubbling off. i bought a stock style from CHECKERS for 12$ and not a leak to speak of.
good luck

*trkklr77* · 09-04-2006, 04:33 PM

the chrome ones suck, even the o ring t/d, pro form or whatever the hell the brand is from kragen, they are weak and easily over tightend and alwasy leak. the gasket style is less likely to bend because it has a flat surface to flat surface mate, the o ring style has to pinch the o ring down and it will flex over the top of the o ring.

cst70rocket · 09-04-2006, 05:08 PM

Biggest problem is they get overtightened. They will pull up in the center and leak. If you take them off and put them against a grinder wheel, you can see the middle isn't touching. You can "mill" it flat and try again. It's only holding water, no need to get out the muscle.

Americanrider · 09-04-2006, 05:15 PM

Money well spent here:

http://www.federal-mogul.com/cda/con...4_7413,00.html

chevymad · 09-04-2006, 09:29 PM

I went through 3 or 4 cheap chrome ones before I gave up. If they don't leak to start with they will eventually. The cheap material will even corrode away to nothing. Put a nicely painted stocker back on, no more problems.

Rdrdave · 09-04-2006, 11:19 PM

Put a stocker on it and get it coated if you want it to look nice. The chrome one I have leaked from day one for me.

kelsfine69 · 09-04-2006, 11:44 PM

try something like this

http://www.jegs.com/webapp/wcs/store...tegoryId=10129

I did find one alot cheaper and it was the same, mabey ebay

rodstored-72 · 09-05-2006, 04:04 PM

all,
thanks!!! i think i am going to try to get a new housing. probably the billet specialties item.

rodstored-72

Bob D · 09-05-2006, 04:21 PM

Put RTV Blue on the bolt threads too. Dont some of those threaded holes go into the water jacket on some of those aluminum manifolds?

Bob

**Green Machine** · 09-05-2006, 05:53 PM

I discarded the o-ring and filled the groove with black high temp RTV. Put a thin coat on intake and housing and cured my leak.

rodstored-72 · 09-06-2006, 10:47 AM

Thanks Again For The Great Help. I Guess I Will Try What You Said Green Machine. It Just Makes Me Sooo Mad That I Have To Do All This Over Again & Now I Have To Clean Off The Fitting & Manifold To Boot!! I Just Wish Things & People Would Make Something Right! What Happen To The Days When People Took Pride In Their Work Or When They Were Doing Something For Someone (ie: Auto Repair - Mechanics). It Seems Like When You Want Something Fit Right Or To Be Done Right You Have To Pay Extra!!!
Well Anyways I Guess I Will Try To Fix The Leak..... Again!

Thanks Again For All Your Help!!!

Rodstored-72

76bonanza · 09-18-2006, 01:56 PM

Any one know what the part number for a stock 350 housing is with no pipe holes in it?

09-04-2006, 03:38 PM	#1
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 1,988	thermastat housing leak!! well i must turn to you professionals again. i have a edelbrock air gap manifold on my 383(350) & i bought i chrome neck from my local autozone. i can't seem to get it to not leak!!! it is really frustrating anyways i have cleaned it off & tried to put it back on again & i still have a leak!!! i want to keep it chrome so my engine will look nice. can you guys please tell me what you have done & or tell me some ideas to try to keep it from leaking i have put gasket maker on both sides of the "rubber" gasket & same result. any help would be much appreciated. thanks!!! rodstored-72

09-04-2006, 03:53 PM	#4
70-Chevy -Chris Join Date: Sep 2002 Location: Moyock, NC Posts: 622	Re: thermastat housing leak!! Ive always heard of people have problems with these things but I just put on the neck with the o-ring and a little gasket sealant and it works fine. Best of luck to ya with it. __________________ 1970 Chevy C-10 P/U, Shortbed, Fleetside - 5/7 drop, 496, TH400, 12 bolt. BUILD THREAD - http://67-72chevytrucks.com/vboard/s...d.php?t=404481 2012 F250 Super Duty P/U - intake, exhaust, tuner, 4" lift with 35's 2017 Chevy Suburban (Wifes Car) - Fully Loaded & Stock "Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem." Ronald Reagan, President of the United States; 1985

09-04-2006, 04:01 PM	#5
lilpup69chevy 67-72 parts finder Join Date: Aug 2006 Location: southeast mo Posts: 788	Re: thermastat housing leak!! heck i used the one with the o ring and a housing gasket as well just don't overtigthen it and i never had any leaks, a little gasket sealant goes a long ways lol __________________ 1969 chevy shortstep 2wd (under construction) 1981 chevy scottsdale lwb 2wd (parts chaser) 2004 pontiac gto (daily driver) 2004 pontiac grand prix gt (the ol ladys car) 1985 chevy short wide 1970 chevy c10 lwb (another parts rig) 1969 gmc lwb (rainy day project) 1968 chevy lwb c10 250 I6 3 spd (soon to be swb)

09-04-2006, 04:03 PM	#6
tom71 what happened to flint mi Join Date: Oct 2005 Location: san diego Posts: 437	Re: thermastat housing leak!! the chrome keeps it from sealing correctly if you scuff the chrome where the gasket sits you mite have better luck . __________________ 71 swb 2wd fleet frame off in progress 72 4x4 blazer daily driver 70 olds cutlass s mint condition owned by a grandma 56 gmc 2wd project waitng 97 fiance mobile

09-04-2006, 04:27 PM	#7
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: thermastat housing leak!! had a chrome one on mine for a 1000 or so miles and replaced it last week casue it was leaking (pretty much from day one) and the chrome was bubbling off. i bought a stock style from CHECKERS for 12$ and not a leak to speak of. good luck

09-04-2006, 04:33 PM	#8
trkklr77 Account Suspended Join Date: Aug 2006 Location: vacaville ca, because it as far from indy as i can be Posts: 777	Re: thermastat housing leak!! the chrome ones suck, even the o ring t/d, pro form or whatever the hell the brand is from kragen, they are weak and easily over tightend and alwasy leak. the gasket style is less likely to bend because it has a flat surface to flat surface mate, the o ring style has to pinch the o ring down and it will flex over the top of the o ring.

09-04-2006, 05:08 PM	#9
cst70rocket Registered User Join Date: Sep 2005 Location: San Angelo or Eufaula Posts: 301	Re: thermastat housing leak!! Biggest problem is they get overtightened. They will pull up in the center and leak. If you take them off and put them against a grinder wheel, you can see the middle isn't touching. You can "mill" it flat and try again. It's only holding water, no need to get out the muscle.

09-04-2006, 05:15 PM	#10
Americanrider Registered User Join Date: Dec 2004 Location: NW, WA. Posts: 1,421	Re: thermastat housing leak!! Money well spent here: http://www.federal-mogul.com/cda/con...4_7413,00.html

09-04-2006, 09:29 PM	#11
chevymad Registered User Join Date: Jan 2001 Location: skamokawa, WA, USA Posts: 527	Re: thermastat housing leak!! I went through 3 or 4 cheap chrome ones before I gave up. If they don't leak to start with they will eventually. The cheap material will even corrode away to nothing. Put a nicely painted stocker back on, no more problems. __________________ 70 C10 long fleet, 355/200 4r, 6 lug disc conversion, 3" drop 70 gmc changed to 67/8 chevy, 454 with voodoo cam, th400, all 74 running gear.. in progress

09-04-2006, 11:19 PM	#12
Rdrdave Broke and still trying Join Date: Apr 2003 Location: Alameda, CA Posts: 562	Re: thermastat housing leak!! Put a stocker on it and get it coated if you want it to look nice. The chrome one I have leaked from day one for me.

09-04-2006, 11:44 PM	#13
kelsfine69 18 Till I Die Join Date: Mar 2005 Location: Alberta, Canada Posts: 1,522	Re: thermastat housing leak!! try something like this http://www.jegs.com/webapp/wcs/store...tegoryId=10129 I did find one alot cheaper and it was the same, mabey ebay __________________ 2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home...

09-05-2006, 04:04 PM	#14
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 1,988	Re: thermastat housing leak!! all, thanks!!! i think i am going to try to get a new housing. probably the billet specialties item. rodstored-72

09-05-2006, 04:21 PM	#15
Bob D Rolled on Paint Club Join Date: Jan 2006 Location: Windham, CT. Posts: 232	Re: thermastat housing leak!! Put RTV Blue on the bolt threads too. Dont some of those threaded holes go into the water jacket on some of those aluminum manifolds? Bob __________________ 1970 GMC 1500 swb fleetside SB 355ci. Smog heads Summit 1102 cam Performer intake and carb. Finally in about 1 piece in the yard.

09-05-2006, 05:53 PM	#16
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: thermastat housing leak!! I discarded the o-ring and filled the groove with black high temp RTV. Put a thin coat on intake and housing and cured my leak. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

09-06-2006, 10:47 AM	#17
rodstored-72 chevy truck fan Join Date: Mar 2005 Location: Gilbert, arizona 85298 Posts: 1,988	Re: thermastat housing leak!! Thanks Again For The Great Help. I Guess I Will Try What You Said Green Machine. It Just Makes Me Sooo Mad That I Have To Do All This Over Again & Now I Have To Clean Off The Fitting & Manifold To Boot!! I Just Wish Things & People Would Make Something Right! What Happen To The Days When People Took Pride In Their Work Or When They Were Doing Something For Someone (ie: Auto Repair - Mechanics). It Seems Like When You Want Something Fit Right Or To Be Done Right You Have To Pay Extra!!! Well Anyways I Guess I Will Try To Fix The Leak..... Again! Thanks Again For All Your Help!!! Rodstored-72



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09-18-2006, 01:56 PM	#18
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: thermastat housing leak!! Any one know what the part number for a stock 350 housing is with no pipe holes in it? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

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