PerTronix Dougs Headers D624 - Manual (Page 2)

Part No. 0110-003118
Page 2 of 3 3-27-2013 DSL
5. Remove the gaskets and 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.
INSTALLATION
1. Starting on the passenger side, slide the header into place from UNDER the car. It
should slip into place without any clearance issues, but again with these cars there can
be variances.
2. Using the supplied Doug’s Premium gaskets, bolt the header to the cylinder head using
the special header bolts and star washers. Snug each bolt before torqueing to 25 ft. lbs.
starting from the center and working outwards.
3.
On the driver’s side things get tight. The driver’s side header features a slip tube on the
#8 tube. The flange for the slip tube is not cut all the way at the factory to prevent
damage during shipping. You will need to cut the flange the remaining portion before
attempting installation.
4.
The driver’s side header slips in from the top. We found that unbolting the pillow block
that holds the steering shaft to the top of the pedal box allows more room for installing
the header. Slip the main portion of the header into place and then the #8 slip tube. You
may want to coat the slip joint with High Temp Silicone to prevent minor leakage. Watch
out for the clutch hydraulic line as you fit the header.
5. It may be necessary to remove the oil filter and cooler adaptor as well.
6. You may find that the pivot shaft for the pedals that comes through the pedal box
interferes with the header collector, in which case you will want to shorten the shaft
slightly to gain more room. We looked at 6 cars and each of these had a bit of
difference in length and it will not hurt anything to shorten it.
7.
Using the supplied Doug’s Premium gaskets, bolt the header to the cylinder head using
the special header bolts and star washers. Snug each bolt before torqueing to 25 ft. lbs.
(for Iron heads) starting from the center and working outwards.
8. If removed re install the oil cooler adaptor and oil filter.
9. Re install the spark plugs and wires.
10. Re install the steering shaft / pillow block.
11. Connect the negative battery cable.
IMPORTANT CHECK LIST
Be sure that all brake lines and fuel lines are clear of headers and/or connector pipes.
All spark plug wires, battery cables, or other electrical components should be clear of
headers and/or connector pipes.
If dipstick tube was removed, make sure it is installed properly and that the dipstick has
been replaced.
Double-check the tightness of all bolts including brackets and accessories.