What thermostat do i need? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lyrikz · 08-18-2008, 05:57 PM

I have an edelbrock performer intake. I need a thermostat. I went to napa and they gave me this thermostat, but it doesnt fit IN the thermostat, the thermo bolts OVER the thermostat. That doesnt seem right... There are little notches on the thermostat housing, i figured the thermo fits in there then bolts down with a gasket. Mr Napa disagrees....

Anyone have a part # for me??? Its a chev 454....

Senator350 · 08-18-2008, 06:16 PM

thermostat sits in the intake, then gasket, then water neck

lyrikz · 08-18-2008, 06:24 PM

Quote:

Originally Posted by Senator350

thermostat sits in the intake, then gasket, then water neck

It sits INSIDE the intake right... this thermo didnt.. I need to know what one to order...

Senator350 · 08-18-2008, 06:27 PM

mmm it doesn't really fit IN the intake... it just sits flush on the opening.

lyrikz · 08-18-2008, 06:41 PM

Quote:

Originally Posted by Senator350

mmm it doesn't really fit IN the intake... it just sits flush on the opening.

ahhh ok.. So it sits ON the intake, then the gasket, then the top housing????

Senator350 · 08-18-2008, 06:56 PM

you got it! should work out fine for you.

are you coating the gasket with permatex?

72hotrod · 08-19-2008, 02:04 PM

Manifold has depression for t-stat to sit into, housing is flat at mating surface on mark IV BBC. Don't know about later versions.

BLACK AND BLUE 67-72 · 08-19-2008, 05:15 PM

Yes the NAPA guy is correct, it does not go into the t stat housing it sets on the block. The newer Chevys go into the housing, some are actually built into it.

**michael bustamante** · 08-19-2008, 06:04 PM

on my performer theres a recessed lip where my t stat sits in, then the gasket goes over, then the housing, mine does not "sit on top" like NAPA says. Your Performer should have the same recessed area in the t stat hole

lyrikz · 08-19-2008, 06:22 PM

Quote:

Originally Posted by 72hotrod

Manifold has depression for t-stat to sit into, housing is flat at mating surface on mark IV BBC. Don't know about later versions.

My 81 bbc the stock thermostat sits in the housing. I cant reuse my ugly old thermostat housing...

Quote:

Originally Posted by michael bustamante

on my performer theres a recessed lip where my t stat sits in, then the gasket goes over, then the housing, mine does not "sit on top" like NAPA says. Your Performer should have the same recessed area in the t stat hole

On my manifold there is NO place for it to set in, its completely flat. the water neck has a recession where the tstat fits into... Michael, do you have a part number for your tstat, or what did you order yours for...?

71tahoe · 08-19-2008, 09:22 PM

Quote:

Originally Posted by lyrikz

My 81 bbc the stock thermostat sits in the housing. I cant reuse my ugly old thermostat housing...

On my manifold there is NO place for it to set in, its completely flat. the water neck has a recession where the tstat fits into... Michael, do you have a part number for your tstat, or what did you order yours for...?

Then you have a defective intake.

Is this a pre 86 motor? It should have a recess the same diameter and thickness as the disc part of the thermostat.

petey-pablo · 08-19-2008, 11:07 PM

Does anyone have actual Pictures of these two types I am confuesed Now haha makes me wanna go take mine apart I just installed it last week On My 454BBC ! Sorry I had to ask! But it would be nice to see these two types. I have my old set up I took off I can take a picture and post it in the morning If you need it... I just added a picture of my old waterneck setup on my 454bbc. changed it out...

lyrikz · 08-19-2008, 11:24 PM

Quote:

Originally Posted by 71tahoe

Then you have a defective intake.

Is this a pre 86 motor? It should have a recess the same diameter and thickness as the disc part of the thermostat.

Its an 81 bbc. The intake is a new edelbrock. THere is no idention or anything like that. No lip for a thermo to sit in. The waterneck/thermo housing has a lip that the thermostat sits in. All i need to know is what thermostat. ahaha..

Im just going to bring my waterneck into napa, and have him get me one that fits in the waterneck and problem solved...

stllookn · 08-20-2008, 12:00 AM

Big block Edelbrock, top, is smooth...small block stock manifold, lower, is stepped. The water neck fits both. I suspect that you might need a different water neck for the big block intake. I thought they were both the same...learn something new every day...LOL! My small block Edelbrock, not shown, has the recess in the manifold just the stock small block manifold.

**michael bustamante** · 08-20-2008, 11:23 AM

Quote:

Originally Posted by lyrikz

My 81 bbc the stock thermostat sits in the housing. I cant reuse my ugly old thermostat housing...

On my manifold there is NO place for it to set in, its completely flat. the water neck has a recession where the tstat fits into... Michael, do you have a part number for your tstat, or what did you order yours for...?

mine is just a standard, t stat fom auto zone 180 degrees, I got the higher priced one. I just asked for a t stat for a 79 chevy truck(doner truck) 350 motor 4 barrel. I did not mention the performer intake. sorry I dont have the part # though.

lyrikz · 08-21-2008, 01:21 PM

I am still thermostatless in seattle. ahaha...

BLACK AND BLUE 67-72 · 08-21-2008, 04:50 PM

Stat housing Napa #735-4366, thermostat MR Gasket #4364. These should end your problems..

08-18-2008, 05:57 PM	#1
lyrikz PITbut Join Date: Sep 2007 Location: monroe washington Posts: 3,052	What thermostat do i need? I have an edelbrock performer intake. I need a thermostat. I went to napa and they gave me this thermostat, but it doesnt fit IN the thermostat, the thermo bolts OVER the thermostat. That doesnt seem right... There are little notches on the thermostat housing, i figured the thermo fits in there then bolts down with a gasket. Mr Napa disagrees.... Anyone have a part # for me??? Its a chev 454....

08-18-2008, 06:16 PM	#2
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	Re: What thermostat do i need? thermostat sits in the intake, then gasket, then water neck __________________ RN U OVR

08-18-2008, 06:56 PM	#6
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	Re: What thermostat do i need? you got it! should work out fine for you. are you coating the gasket with permatex? __________________ RN U OVR

08-19-2008, 05:15 PM	#8
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: What thermostat do i need? Yes the NAPA guy is correct, it does not go into the t stat housing it sets on the block. The newer Chevys go into the housing, some are actually built into it. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

08-19-2008, 06:04 PM	#9
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,858	Re: What thermostat do i need? on my performer theres a recessed lip where my t stat sits in, then the gasket goes over, then the housing, mine does not "sit on top" like NAPA says. Your Performer should have the same recessed area in the t stat hole __________________ 1967custom

08-18-2008, 06:27 PM	#4
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	Re: What thermostat do i need? mmm it doesn't really fit IN the intake... it just sits flush on the opening. __________________ RN U OVR

08-19-2008, 02:04 PM	#7
72hotrod Registered User Join Date: Mar 2004 Location: Red Chute,LA Posts: 62	Re: What thermostat do i need? Manifold has depression for t-stat to sit into, housing is flat at mating surface on mark IV BBC. Don't know about later versions.

08-19-2008, 11:07 PM	#12
petey-pablo "THE GREEN GOBLIN" Join Date: Mar 2008 Location: Fremont Ca. Posts: 1,025	Re: What thermostat do i need? Does anyone have actual Pictures of these two types I am confuesed Now haha makes me wanna go take mine apart I just installed it last week On My 454BBC ! Sorry I had to ask! But it would be nice to see these two types. I have my old set up I took off I can take a picture and post it in the morning If you need it... I just added a picture of my old waterneck setup on my 454bbc. changed it out... Attached Images __________________ Petey-pablo "THE GREEN GOBLIN" 1972 Cheyenne 10 Short Fleet Side Front 2.5inch Spindles with 2inch Springs Rear 4inch drop Springs. 454BBC TH400,Posi 1971 Cheyenne 10 Long Fleet Side 454BBC TH350,Posi Sold Drive it like you stole it! Petey-pablo@sbcglobal.net Last edited by petey-pablo; 08-19-2008 at 11:21 PM. Reason: Added Pic.

08-20-2008, 12:00 AM	#14
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: What thermostat do i need? Big block Edelbrock, top, is smooth...small block stock manifold, lower, is stepped. The water neck fits both. I suspect that you might need a different water neck for the big block intake. I thought they were both the same...learn something new every day...LOL! My small block Edelbrock, not shown, has the recess in the manifold just the stock small block manifold. Attached Images __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary) Last edited by stllookn; 08-20-2008 at 12:03 AM.

08-21-2008, 01:21 PM	#16
lyrikz PITbut Join Date: Sep 2007 Location: monroe washington Posts: 3,052	Re: What thermostat do i need? I am still thermostatless in seattle. ahaha...

08-21-2008, 04:50 PM	#17
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: What thermostat do i need? Stat housing Napa #735-4366, thermostat MR Gasket #4364. These should end your problems.. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA



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