Rebuilding my first 1969 442 Convertible - ClassicOldsmobile.com


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Old July 17th, 2017, 06:08 AM   #1
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Rebuilding my first 1969 442 Convertible

A few weeks ago, I was at a local car show with two of my toys (1970 CS Green/Rusty and 1971 CS Gold and 90% original).
A local resident came over to me and looked at my two cars and said, “My friend is too old to restore his 69, 4-4-2 Convertible.” Are you interested in buying it for $xxxx. I said, “If the condition is as good as you say, when can I pick it up.”

I bought my first 442. It’s going to take a lot of work.

After a 2-hour inspection, I bought it and dove it home. We made the 80-mile trip without any real issues.
First stop, the gas station and it took 19.99 Gallons of 93 octane (Fuel tank assumed to be 20 gallon).
About 70 miles later, one of the wheel center caps broke off while in a highway clover leaf.
A little later, while driving slowly and taking a sharp right turn the engine quit.
After about 5 minutes we got it going again. I will assume is was dirt in the carburetor.
The next day, I tried to start the car and the carburetor just overflowed with gas.

I gave the carburetor a quick temporary rebuild.
Changed the plugs, oil, adjusted timing, dwell and carburetor mixture. Then took it for a short road test.

I have been driving 70-72 CS with Rocket 350’s for 20 years and 200k miles.
When I stepped on the gas of the full boxed frame convertible with the original 400 ci engine, the TH-400 automatic transmission left rubber in First and “Second” gears.
“WOW” my Rocket 350’s never did that.

Some pictures on old link.
https://classicoldsmobile.com/forums...e-miles71.html

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Old July 17th, 2017, 06:08 AM   #2
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Details

Details:

The local reputable carburetor shop is on Holiday, so getting a profession rebuild will take a few weeks.
The carburetor serial number indicates it’s not the original, #[70] 29244 KA 0169
This seems like a Buick 1969 carburetor?
Existing Jets = 70, Rods = 43B

I think the correct number should be [70] 29252 (corrected)
Engine 400, Automatic, No AC, No-30

Known Facts.
1969-442-Green, VIN 344679M221185

Decoded:
3-44-67-9-M-221185
3 = Oldsmobile
44 = 442 V8 (1968-1971)
67 = Convertible
9 = 1969
M = Lansing, MI
221185 = Production Number Sequence

Engine:
This car does have the original 1969 400 ci. The engine has about 125k miles.
I checked the compression on all 8 cylinders and they ranged from 170 – 190.
Underneath there is No visible oil leakages around the Oil pan or Rear main seal.
The transmission pan is a little oily.
When warm, the engine starts without touching the gas pedal.

Short History:
This car has been owned by two different family’s. It has had a few Rebuilds. I am still reading the pile of work recipes to figure out the cars history.
It will need some new metal. Not sure of my final plans for the car.
Tentatively, make is safe and legal.
Figure out what Non-standard modifications and maybe tweak closer to original.
Bottom line, keep the budget under control and keep it drivable. No Hanger Queen.

Last edited by Miles71; July 17th, 2017 at 10:06 AM.
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Old July 17th, 2017, 06:09 AM   #3
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Need some Original engine pictures:

I am in the process of cleaning up the original 400 CI engine.
I am interested in seeing pictures of an original 1969 400 CI engine for future references.
I would like to know what is Not original or aftermarket junk.
I do have a 1969 factory service manual. However, real pictures will help more.

The spare parts that came with the car, included the original bronze value covers and parts of the Air breather system.

Thanks.
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Old July 17th, 2017, 06:19 AM   #4
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I would get a '69 assembly manual as well. It gives you the correct part numbers and configurations for nearly everything, particularly under the hood. The carb you should have for your car is the (70) 29251 and not 28251 as you stated above, if you have the THM 400. If your transmission is manual, the numbers should be 29253.

I'm a bit biased, but the '69 4-4-2 convertible is a beautiful car. Enjoy the work you do on your car but, most importantly, enjoy driving it!

Randy C.
'68 4-4-2 convertible
'69 4-4-2 convertible
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