# Broken vacuum line. SBC 350 1977 Corvette **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, corvette\ **Created:** [August 12, 2017, 10:22pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843 "2017-08-12T22:22:41Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![CascadeDiver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cascadediver/32/7964_2.png) [@CascadeDiver](https://community.cartalk.com/u/CascadeDiver)\ **Post date:** [August 12, 2017, 10:22pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/1 "2017-08-12T22:22:42Z")
![20170812_151724](https://global.discourse-cdn.com/cartalk/original/2X/a/aa548f1be27507f54de3f2f8bd134b4ef39b51a4.jpg) ![20170812_151642](https://global.discourse-cdn.com/cartalk/original/2X/3/3ef089049f109542c344d7ec01c8ef476fda1337.jpg) Oops, I broke this fitting. But what is it? One end is a hard-line going somewhere in the other end is a hose. Can anyone point me in the right direction on what this is so I can replace it please. SBC 350 1977 Corvette ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 12, 2017, 10:36pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/2 "2017-08-12T22:36:13Z")
That’s a plastic vacuum fitting. Here’s a brass fitting that can replace it. > **[McMaster-Carr](https://www.mcmaster.com/#standard-barbed-brass-threaded-pipe-to-tube-fittings/=18wwegt)** > > McMaster-Carr is the complete source for your plant with over 570,000 products. 98% of products ordered ship from stock and deliver same or next day. Click on brass threaded pipe to tube fittings. Ace hardware probably has the same fitting Just make sure it’s the proper thread size. Tester ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [August 13, 2017, 12:12am UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/3 "2017-08-13T00:12:33Z")
That looks to be to be connected to the intake manifold, and if that hose if it is running towards the back of the car, under the firewall, is probably going to the transmission. If it sports an automatic anyway. If that hose instead goes through the firewall it may be for the HVAC system’s vent doors, power their vacuum motors. My early 70’s Ford truck has a similar gadget that screws into the intake manifold sort of under and behind the carb area, only it is brass on my truck, not plastic. I think Ford calls that part a vacuum manifold port or fitting. On my truck there’s a metal hose that goes from there back to the automatic transmission to the transmission vacuum modulator. Take a look at this link > **[Classic Performance Manifold Vacuum Fittings IN38RS](https://www.summitracing.com/parts/clp-in38rs)** > > Find Classic Performance Manifold Vacuum Fittings IN38RS and get Free Shipping on Orders Over $99 at Summit Racing! > Hook up your vacuum lines securely with Classic Performance manifold vacuum fittings. These quality replacements are available in... ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [August 13, 2017, 1:48am UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/4 "2017-08-13T01:48:32Z")
That appears to be a marine engine and the broken piece is likely a thermal control for vacuum to some cooling system component. If you determine what the hose on the top connection attaches to you should be able to determine what the specifications for the part are. After a second look with my bifocals on I agree with others that it is likely just a vacuum outlet fitting that should be easily replaced. But it does seem to be a marine engine. ---
**Author:** ![CascadeDiver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cascadediver/32/7964_2.png) [@CascadeDiver](https://community.cartalk.com/u/CascadeDiver)\ **Post date:** [August 13, 2017, 2:19am UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/5 "2017-08-13T02:19:37Z")
Thanks for the information, I searched Intake manifold vacuum port and they came right up. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [August 13, 2017, 3:57am UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/6 "2017-08-13T03:57:25Z")
Put the effort into finding out where the other ends of the hardline and the hose terminate and it’ll be easy to tell you what they are. Doing so without that information may or may not be accurate. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [August 13, 2017, 1:31pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/7 "2017-08-13T13:31:01Z")
Just curious… what makes it a marine engine? ---
**Author:** ![BillRussell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/billrussell/32/3179_2.png) [@BillRussell](https://community.cartalk.com/u/BillRussell)\ **Post date:** [August 13, 2017, 2:02pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/8 "2017-08-13T14:02:54Z")
> [@Rod\_Knox](#): > > marine engine in a corvette? ---
**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\ **Post date:** [August 13, 2017, 2:12pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/9 "2017-08-13T14:12:00Z")
> [@Mustangman](#): > > Just curious… what makes it a marine engine? A couple possibilities: ![Picture 1](https://global.discourse-cdn.com/cartalk/original/2X/f/f0f85a7cdf22d488de10ef61eab82fae543148cf.png) ![Picture 2](https://global.discourse-cdn.com/cartalk/original/2X/7/759f94a56c3eb37a09dbff8f7a232f216771056f.png) ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [August 13, 2017, 3:58pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/10 "2017-08-13T15:58:48Z")
> [@BillRussell](#): > > > [@Rod\_Knox](#): > > > > marine engine > > in a corvette? The carburetor is a Carter that I don’t recall ever seeing on a Chevrolet automobile engine but it was used on marine engines. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [August 13, 2017, 7:34pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/11 "2017-08-13T19:34:19Z")
The intake and carburetor have been replaced with an Edelbrock Performer intake manifold and Edelbrock Performer carburetor. The Edelbrock Performer carburetor is a copy of the Carter AFB carb. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [August 13, 2017, 7:37pm UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/12 "2017-08-13T19:37:21Z")
Corvette tail lights on a Dodge Ram? From the doors forward the body is a 2006-2008 Ram. ---
**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\ **Post date:** [August 14, 2017, 12:30am UTC](https://community.cartalk.com/t/broken-vacuum-line-sbc-350-1977-corvette/106843/13 "2017-08-14T00:30:28Z")
It’s actually an all-fiberglass custom body with a corvette engine in the rear: > **[Watercar Python: A Corvette Powered Amphibious Hot Rod that Hits 60mph in 4.5...](https://www.carscoops.com/2009/10/watercar-python-corvette-powered/)** > > The same folks that brought you the Subaru-powered, Chevrolet Camaro-bodied amphibian are… ;-]