Oldsmobile Technical Information

Toronado Oil Pans on rear wheel drive cars and why that's not the hot performance ticket.

1972 Convertible lift cylinder filling procedure Page 1 and Page 2   Courtesy of Steve D.  This procedure should apply to other years as well.   And if you are wondering what to fill it with, it's rumored older cars used brake fluid and late 60's cars used transmission fluid.  These two fluids don't "play well" together so I would highly recommend checking what you have.  If it's slippery it's Dextron.

Cylinder head flow information from Rocket Ranch Porting Service.   This information is posted "as is" for discussion only.  I have not confirmed it nor do I endorse it.

Discussion of engine mounts.   The question of which mounts should be used in late 60's and early 70's A-Bodies has been beat to death and the corpse is here.

Instructions on converting to an HEI distributor.   If you hate setting points and are willing to have a non-stock looking distributor then a HEI could be for you.

Listing of Oldsmobile Cams that have been mention on the Oldsmobile Mailing list.  I wanted to create a listing of camshafts and how they work vis-a-vie stock/street race/strip.  I wanted to get real world examples.  Please let me know of any corrections or new information.

'70 Chevelle build sheet This is an example of the sheet that the assembly line workers used while they were building the car.  At some point the workers could either throw it out or stick it in the car.  People find these in the oddest places.

'An example of a tranny tag The transmission identification tag is found on the passengers side.

'69 Vacuum diagram The CSM diagram showing how to route the 442 (except W-30) and some other 4 barrel engines.

Oldsmobile block code location. Here is a picture showing where the block letter code is located if you are having trouble locating yours.   The FAQ has a breakdown of the numberic code but the letter often tells you all you need to know about an engine.

AIR bumps in a head. The infameous AIR bumps that everyone wants to grind down are shown in this blurry photo.   These are in a stock C head.

The block VIN derivative code location. This is the code that should match your VIN if the engine was the one that was in the car when it was built.   For my engine the code format was 39M123456 where the 3 represents Oldsmobile, 9 for year of manufacture (8=68, 9=69, 0=70, ..., 4=74, 5=75, 6=76, etc.), M for built plant (M = Lansing, B=Baltimore, X = Kansas City, Z = Fremont, CA, etc), and the 123456 is the sequential number that should match the last 6 digits of the VIN.

The codes on the back of the block. Unless you have the transmission off of the car you can never get to these codes.   The belief is that the early F0-F1 blocks have a higher nickle content.

How to Make a 70 Chevelle Go Fast This is a humerous look at what some people will do to their cars.  I hope most Chevelle owners are not insulted.   I feel justified since I have a 70 Chevelle and an Olds.  BTW: If you know anything about this car I'd love to hear about it.

Converting From an External to an Internal Regulator  If you have already obtained an internally regulated alternator and know how to work with automotive wiring then this diagram is all you need.  All new conections should be soldered or crimped with a quality crimping tool and then covered with heat shrink tubing at the least.  Courtesy of Steve Reed.

Buying a Flooded Car This is one person's experience with flooded cars that was posted to the Oldsmobile Mailing List.  I've placed it here because the subject of flood damage comes up every summer.  Courtesy of Don Sowers.

Starting a Stored Car The question comes up every spring about starting a car that has not run for a while so here's some pointers.  I'm not a mechanic so please be aware that these are only pointers. Oldsmobile Mailing List.  I've placed it here because the subject of flood damage comes up every summer.  Courtesy of Don Sowers.

Sleight of Hand this is a 3 page article about getting your car to go faster without spending too much money.  Even though it is oriented towards Pontiacs it does have some interesting ideas.  Courtesy of Kerry Kroger.

 Adapting a Floor Jack to Lift TransmissionsAnother useful tool for the shadetree mechanic.  This adapter for using a floor jack to lift transmissions was posted on the Oldsmobile Mailing List.  Please note that working under automobiles, especially with suspended items like transmissions on jacks, is inherently dangerous and all applicable precautions should be taken.  Courtesy of Bob Handren.

Here are some pictures illustrating moving the proportioning (or combination) valve to the top of the frame to provide clearance for headers.  The first image is from the 1969 chassis service manual and shows the entire braking system of an A-Body.   The second image is a closer view of the combination valve mounted on the side of the frame.   Lastly, is a picture of a regular proportioning valve moved to the top of the frame.  Note that the brake lines should be replaced rather than re-bent as they get brittle with age and pose a safety hazard (duh!) if they rupture under pressure.  With the valve on top of the frame Hedman headers can be installed in a '69 A-Body/automatic transmission/no A/C car with the engine in the car.  Been there, done that.

A Diagram of a Brake Combination valve.  This diagram is of a new car's (1970+) combination valve.  Cars like a 1968 or 1969 Oldsmobile with front disc brakes have two separate devices, a metering valve and a distribution block, to do the same thing.   The metering valve takes up a volume of fluid to allow the brake shoes to move out to touch the drums before the pressure builds and the front discs begin to work.  Of course, four wheel drum cars do not need a metering valve at all.

Automotive Calculations.  A JavaScript calculator for displacement, gear ratios, tire sizes, etc.  Common values may be selected from drop boxes or you can enter your own.  As the fields are entered other fields should automatically update to refect the new values.  Metric conversions should be automatic.  Please let me know if you find any mistakes or oddities and I will try to fix them.

Automotive Conversions.  A JavaScript convertor of commonly used units.  From U.S. gallon to Imperial, U.S. dollars to Canadian, Gallons (Imp. or U.S.) to Litres, etc.  Let me know what is missing and I will add it.

Finding and Fixing Vibrations.  Basically just what the chassis service manual (CSM) has on finding moans, jitters booms, and roughness.

10 things I hate about you  and how I'm going to fix them.  Sure, you love your car, but if it's getting driven a lot and will never be a show car then why not make it a little easier to live with?  Caution, this is under heavy construction and _none_ of these links work yet.  This is just ideas, I would appreciate any input.

Go back to the top