Barn find- started blown head gasket??
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Joined: May 2020
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From: New England
First off the pictures of the drain oil do not show just an accumulation of moisture from setting. Thats a lot of water mix. I still don't think your out of the woods yet. Keep a eye on the oil. You said the antifreeze was ok, Antifreeze and internal engine parts don't get along to well, the antifreeze repels oil causing lack of lubrication on the bearings. On that posting about the fuel filter, after running awhile more change out that small filter again,. And as stated about the fitting on the carb, NEVER put tape or sealant on a flare fitting, the threads don't seal the connection, the flare nut pressure does.
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From: SW Florida.
pull the kick panels and check the number two body mounts. Take a look at the sheet metal right below the outer corners of the windshield. Don't fall in love with this car until you're sure the underside is solid enough. There's a real good chance you're working on a parts hulk. https://www.corvetteforum.com/forums...orvette-6.html. go to post 107 shows you how to find all the bad stuff on these cars that you are going to find on that car.
Last edited by derekderek; Jun 6, 2020 at 11:48 AM.
Racer
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From: west mi. / ms. gulf coast
The intake bolt could be your problem. Water circulates through the intake front and back of it, both sides into the heads. If either the front 2 bolts or back either side are loose water could seep past the paper gasket down into the lifter valley and down into the lower engine oil. That could be your water leak problem. No real way to tell if the gasket is leaking there. A pressure check will show loss but not a given point. Intake manifold gasket is easier to change than a head gasket but still a PIA.
Le Mans Master
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From: Temple Terrace Florida
You could also pull the plugs to see if one or more look very clean as a result of being cleaned with water while the engine was running. A very rusty plug will also point you in the direction of a blown head gasket, cracked head or a cracked block. Keep us posted. Jerry
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From: New England
You could also pull the plugs to see if one or more look very clean as a result of being cleaned with water while the engine was running. A very rusty plug will also point you in the direction of a blown head gasket, cracked head or a cracked block. Keep us posted. Jerry
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From: New England
pull the kick panels and check the number two body mounts. Take a look at the sheet metal right below the outer corners of the windshield. Don't fall in love with this car until you're sure the underside is solid enough. There's a real good chance you're working on a parts hulk. https://www.corvetteforum.com/forums...orvette-6.html. go to post 107 shows you how to find all the bad stuff on these cars that you are going to find on that car.
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Well so far so good. Run her all the time.
Oil- perfect
AntiFr-perfect
Running temp- perfect
Smoke on start up- none
Smoke while running-none
Issue:
Running VERY lean. Cant throttle up unless I choke her. Backed off the mix screws 7 full turns (quadrajet)
Next up:
Quick carb clean
Spray some carb cleaner around the manifold to see if gasket needs replacing
Compression test
Leak down test
Oil- perfect
AntiFr-perfect
Running temp- perfect
Smoke on start up- none
Smoke while running-none
Issue:
Running VERY lean. Cant throttle up unless I choke her. Backed off the mix screws 7 full turns (quadrajet)
Next up:
Quick carb clean
Spray some carb cleaner around the manifold to see if gasket needs replacing
Compression test
Leak down test
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Hi and welcome!
Get a napa 2-4055 accelerator pump.
Get the napa roll over filter 23051 (short).
or 23052 (long).
Get the napa roll over filter 23051 (short).
or 23052 (long).
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Race Director
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From: SW Florida.
kit will come with pump piston-diaphragm-cup-whatever it is called... is this windshield rot under the windshield? is windshield out? what do body mounts look like? cuz that matters more than the carb.
Last edited by derekderek; Jun 23, 2020 at 12:39 PM.
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From: New England
Under the weather stripping between the interior panel. You got me nervous now. Going to pull the kicker. Had a problem getting the sill plates out. Screws are rusted.
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