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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Old July 26th, 2017, 08:05 AM   #5
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Making slow Progress.

The Interior has been removed and is in the process of cleaning and repairs.
The carburation is back from the shop and re-installed.
After a few spins to get the fuel into the carburetor, the engine started right up.
Later this week, I will take the car for a road test and then re-tune the carburetor.
Most of the replacement parts have arrived, except the much-needed headlight screw kit.
I only need one seat to drive the car, but I do need to get all 4 headlights re-installed.

The Door cards arrived and were for a 1968, so I sent them back for the correct 1969.
Before sending them back, I compared the reproduction 1968 door cards, to a real 1968 442.
The match was very good.

I also ordered a 1969, Assembly Manual.

Attached are pictures of the carburetor before and after.






Carb Before shot


After cleaning.
Also removed most of the old blue paint.



Interior in the process of cleaning. Valve covers will be repainted bronze.
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Old July 31st, 2017, 05:29 AM   #6
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Patching and Paint.

Patching and Paint.

I started with the Headlight bezels. Cleaned and repainted.
I am still waiting for Headlight screw kit to complete the headlight mountings.
Can't drive the car until install headlights.

I finished patching the few random holes in the floor.
I also repainted the whole floor.
Later, at the shop I will start working on the underside of the floor.
The Big fixes will wait until winter. For now, I want to get to the car shows within the next week.

I have already started installing the Insulation and hope to get the Capet installed this week too.
The 1969 doors, do not have a "Side Impact" door beams.
This will make it harder to install insulation, without the door beam. Normally, I use a 6"x16" folded sections of insulation wedged between the beam and door skin. The fit is snug enough to keep the insulation in place.
This makes the doors much quieter and they sound SOLID when you close the doors.





Headlight area before cleaning and painting.


After cleanup and painting


First layer of insulation 50% completed.
There will be at least two layers of insulation in most areas.
I like working on convertibles. I don't bump my head as much.

Last edited by Miles71; July 31st, 2017 at 05:31 AM.
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Old July 31st, 2017, 05:34 AM   #7
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Questions:
Does anyone have any good pictures of the Floor **** Neutral safety switch installation?
My install is a mess of homemade parts.


How do I tell of the Roof pump is full of fluid?
My roof does go up and down, but one side is faster than the other.
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