PerTronix D743 User Manual

Corporate Office: PerTronix Inc. 440 E. Arrow Highway, San Dimas, California 91773 * Phone [phone] * FAX [phone] * www.dougsheaders.com

HEADER INSTALLATION INSTRUCTIONS

D743

65-75 OLDSMOBILE CUTLASS, VISTA CRUISER WAGON

71-75 OLDSMOBILE DELTA

©

PerTronix

order to realize the full potential of our good fit, please read and understand these instructions completely prior to starting work.
CHECK TO MAKE SURE YOU RECEIVED THE PROPER PARTS FOR YOUR APPLICATION. THE HEADER NUMBER WILL

BE STAMPED ON THE ENGINE FLANGE. IF YOU ARE UNSURE YOU HAVE RECEIVED THE PROPER PARTS CALL
BEFORE YOU START WORK.

BE SURE TO WORK SAFE! WHENEVER YOU WORK UNDER THE VEHICLE BE SURE THAT IT IS LOCATED ON LEVEL,
SOLID GROUND AND IS SUPPORTED BY ADEQUATE SAFETY STANDS!

REMEMBER: HOT ASPHALT WILL NOT SUPPORT MOST JACK STANDS!

Many factors affect the installation of headers, some of which are broken or aftermarket motor mounts, accidents that impact the
configuration of the frame, and/or the installation of different engines or aftermarket cylinder heads. Most installations require
some welding. If you are uncomfortable with welding operations, we recommend that you contact a professional exhaust
system specialist to install your new headers.

Attention Customers breaking in new engines: Due to the extreme heat generated during the break-in process, the
appearance of the ceramic coating may be altered in certain areas. The protection characteristics and thermal barrier properties
of the coating is never compromised. It is recommended that a cast iron manifold or old set of headers be used for this process.

Notice: The coating of these headers can be marred or scratched during installation. If the header needs to be returned and is
damaged, you will be charged for recoat.

thanks you for choosing

DOUG’S HEADERS

, the best fitting, highest quality header on the market. In

DISASSEMBLY / ASSEMBLY

LEFT SIDE:

1. Disconnect the negative battery cable from the battery.

2. If a car lift is not available, raise the vehicle 2 feet or higher and support it with
adequate safety stands. Make sure the vehicle is on a flat solid surface and is stable.

3. Apply penetrating oil to all nuts and bolts to be removed.

4. Unbolt headpipes from stock exhaust manifolds and push aside.

5. Remove starter, starter brace, frame brace, stock manifold, dipstick tube and vacuum
canister for the heat riser. Note: Starter brace and fender brace may be discarded as
they cannot be used with the installation of your headers. Models equipped with the
heat shields over the motor mounts must either discard them or modify them for
maximum clearance of header tubes.

Part No. 0110-003078 Page 1 of 3 Rev. 1 11-19-13 DSL

6. Remove any gasket material or any carbon deposits that remain on the head surface.
The use of a gasket removal agent will ease the removal of any gasket material.
We recommend the use of a sharp gasket scraper to remove the bulk of material and to
finish the operation with a sanding block to provide a clean flat sealing surface.

7. Apply a THIN film of Ultra Copper Hi-Temp Sensor-Safe Silicone Sealer to the header
side of the supplied gasket and glue it to the header. Masking tape can be used to help
stick the gasket to the manifold.

8. Apply a THIN film of Ultra Copper Hi-Temp Sensor-Safe Silicone Sealer to the header
side of the gasket.

9. Apply anti-seize to the header bolts.

10. Starting from below, work header through chassis into position. Note: Cars with
pressure valve and brake warning light switch mounted on the inside of frame may
have to be relocated to the top of the frame.

11. With header loose, replace starter. Reroute cable from the battery to starter to allow
maximum clearance on all header tubes.

12. Start all bolts with lock-washers. Use a 1-1/8” bolt, flat washer and lock-washer at
notches in flange.

13. Tighten bolts evenly.

14. Replace dipstick tube and vacuum canister for the heat riser. Note: Discard the vacuum
canister on ’75 models.

RIGHT SIDE:

1. Remove the stock exhaust manifold and oil filter from block.

2. Remove any gasket material or any carbon deposits that remain on the head surface.

The use of a gasket removal agent will ease the removal of any gasket material.
We recommend the use of a sharp gasket scraper to remove the bulk of material and to
finish the operation with a sanding block to provide a clean flat sealing surface.

3. Apply a THIN film of Ultra Copper Hi-Temp Sensor-Safe Silicone Sealer to the header

side of the supplied gasket and glue it to the header. Masking tape can be used to help
stick the gasket to the manifold.

4. Apply a THIN film of Ultra Copper Hi-Temp Sensor-Safe Silicone Sealer to the header

side of the gasket.

5. Apply anti-seize to the header bolts.

6. Starting from below, work header through chassis into position (some models may

require the engine to be raised).

7. Start all bolts with lock-washers. Use a 1-1/8” bolt, flat washer and lock-washer at

notches in flange.

8. Tighten bolts evenly. Reroute trans lines to clear header and modify or discard brace.

9. Replace oil filter adapter, making sure cooler lines do not touch header tubes.

10. Install the supplied reducers and connect to the exhaust system.

11. Connect the negative battery cable.

Part No. 0110-003078 Page 2 of 3 Rev. 1 11-19-13 DSL