Best exhaust manifold gasket??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BB72CHEVKT · 03-12-2012, 10:48 AM

I can't wait to see how these look mounted. I had them blasted and dipped and thought they came out pretty good. I should have just bought headers but what the hell it is just a Goodwrench 260hp motor. Wondering what everyone is using for gaskets??

mrein3 · 03-12-2012, 11:04 AM

I've never used an exhaust manifold gasket on a small block Chevy.

**425HP409** · 03-12-2012, 12:01 PM

Chevrolet never used gaskets when they built the engine and I never use them either. Gaskets are to try to make up for some warpage in the manifolds, but to me are really a leak waiting to happen. I run a large flat file over the manifold mating surface to make sure it is flat and clean and then bolt them on with never a leak. I also run the file over the cylinder head mounting surface.

Hubscrub · 03-12-2012, 12:01 PM

Quote:

Originally Posted by mrein3

I've never used an exhaust manifold gasket on a small block Chevy.

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BB72CHEVKT · 03-12-2012, 12:08 PM

ok I will try them with no gasket, it is getting closer, have new valve finned valve covers and the rest of the fuel system on the way and hope to button everything else up this week

PS How much torque do you apply?

brans72 · 03-12-2012, 08:08 PM

Did you get the bolt from a local hrdware store? If so will you measure them and let me kno length etc please. Thanks!

71HUGGER396 · 03-12-2012, 08:12 PM

Those are going to look great. You can't beat the engine.

BB72CHEVKT · 03-12-2012, 11:25 PM

Quote:

Originally Posted by brans72

Did you get the bolt from a local hrdware store? If so will you measure them and let me kno length etc please. Thanks!

I got them at Fastenal and did not see your post until they were already installed. They are stainless 3/18-16.

BB72CHEVKT · 03-12-2012, 11:29 PM

Quote:

Originally Posted by 71HUGGER396

Those are going to look great. You can't beat the engine.

I hope. This one supposedly has 60K on it. It did appear to be true by how clean it was but I did not look at the bottom end. I think this one had set up for 6 years. I am waiting on a new gas tank and odds and ends.

03-12-2012, 10:48 AM	#1
BB72CHEVKT Junior Member Join Date: Mar 2007 Location: Hideaway, TX Posts: 4,950	Best exhaust manifold gasket??? I can't wait to see how these look mounted. I had them blasted and dipped and thought they came out pretty good. I should have just bought headers but what the hell it is just a Goodwrench 260hp motor. Wondering what everyone is using for gaskets?? Attached Images __________________ 71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400

03-12-2012, 11:04 AM	#2
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,253	Re: Best exhaust manifold gasket??? I've never used an exhaust manifold gasket on a small block Chevy. __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

03-12-2012, 12:01 PM	#3
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 841	Re: Best exhaust manifold gasket??? Chevrolet never used gaskets when they built the engine and I never use them either. Gaskets are to try to make up for some warpage in the manifolds, but to me are really a leak waiting to happen. I run a large flat file over the manifold mating surface to make sure it is flat and clean and then bolt them on with never a leak. I also run the file over the cylinder head mounting surface. __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette

03-12-2012, 12:08 PM	#5
BB72CHEVKT Junior Member Join Date: Mar 2007 Location: Hideaway, TX Posts: 4,950	Re: Best exhaust manifold gasket??? ok I will try them with no gasket, it is getting closer, have new valve finned valve covers and the rest of the fuel system on the way and hope to button everything else up this week PS How much torque do you apply? Attached Images __________________ 71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 Last edited by BB72CHEVKT; 03-12-2012 at 04:23 PM. Reason: add info

03-12-2012, 08:08 PM	#6
brans72 Registered User Join Date: Dec 2009 Location: Durham,NC Posts: 636	Re: Best exhaust manifold gasket??? Did you get the bolt from a local hrdware store? If so will you measure them and let me kno length etc please. Thanks!

03-12-2012, 08:12 PM	#7
71HUGGER396 Confirmed Truckaholic Join Date: Oct 2000 Location: Sarver,PA 16055 Posts: 732	Re: Best exhaust manifold gasket??? Those are going to look great. You can't beat the engine. __________________ 1968 50th STEP SIDE SHORTY, 350/350, a/c, ps, p,b Daily Driver, 1970 Cst short fleet, all black, 350/350, 1970 2wd Blazer, 2wd, 6 cyl. 3 spd, original, now a 454, 350turbo, 3.73 posi, on the road 1971 2wd fleet shorty, 454, 700r4, 3.73 posi, SOLD to 67OLDSTYLE72 "My rig's a little old but that don't mean she's slow" - SAWYER BROWN's Six Days On The Road SEMPER FI "I use to be a lean mean fighting machine, but now I'm a huffin, puffin, over stuffin love muffin"



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