COMP Cams 3135KT Adjustable Fuel Pump Eccentric - Manual

Ford Roller Timing Set
With Adjustable Fuel Pump Eccentric
(Part # 3108KT, 3121KT, 3135KT)
Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice.
Please read all of these instructions carefully before beginning installation and also take a moment to
review the included limited warranty information.
Note: The installation procedures which follow
assume that the engine has been disassembled
and cleaned as it would be for a timing set change.
Installation Instructions
1. Prepare the Engine. Loosen all rocker arms so that the camshaft can rotate freely.
2. Clean everything! Make sure that the engine mounting surfaces and timing set components are as
clean as possible. The life of the chain and sprockets depends on it.
3. Install the Dowel Pin. If you engine original used the two-piece fuel pump eccentric and the short
dowel pin, remove the old down pin. Press the new dowel pin into place, making sure that it is
fully seated in the camshaft. Note: Some older engines have a spacer on the camshaft and a
camshaft sprocket which is flat on the back. If your engine has one of these spacers, remove and
discard it. The new camshaft sprocket has the spacer machined in it.
4. Align the Engine. Rotate the crankshaft until the number one piston is at top dead center. The
crankshaft key should be pointing straight up. Rotate the camshaft until the dowel pin is pointing
straight down.
5. Assemble the Timing Set. Select the appropriate keyway and timing mark on the crankshaft
sprocket for the camshaft timing baseline desired. We recommend the standard timing position,
which uses the round timing mark and round keyway. Loop the chain over the camshaft sprocket.
Align the camshaft and crankshaft timing marks and loop the chain around the crankshaft sprocket.
Lift the sprocket and chain assembly into place on the camshaft and crankshaft. Slide the
crankshaft sprocket onto the crankshaft, while sliding the camshaft sprocket onto the camshaft.
Make sure that the sprockets are fully seated on their shafts.
6. Install the Fuel Pump Eccentric. Install the eccentric onto the camshaft sprocket making sure that
the dowel pins fully engage the proper holes in the eccentric. Install the proper bolt and washer
(supplied) and thread it all the way in, but leave it slightly loose. Check for clearance between the
washer and the dowel pin. If the washer touches the pin, remove the pin and grind one end until the
pin will no longer protrude through the eccentric, then re-install the dowel pin. The adjustable fuel
Tools & Supplies Needed:
o Torque Wrench
o Degree Wheel (Part #4791)
o Assembly Lube or Camshaft Lube (Part #154)
o Thread Locking Compound (Lock-tite)
Part # 150
Revised 12/6/04