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TECH INFO / INFORMACION TECNICA
CAT 3208 Loss of Oil Pressure after Rebuild
CAT 3304 Cam Bearing Installation
ISUZU 6SA1 & 6SA1T Valve Recess
Caterpillar 3208 Oil Pressure loss after rebuild
    We at Continental Diesel have noticed that when a do-it-yourself rebuild has been done that the engine will have normal oil pressure at start-up but after the engine has sat overnight there will be no oil pressure.
    This is usually due to to a misplaced "O" ring that seals the oil galley between the oil pump and the front cover. Sometimes the "O" ring was missing completely! This causes all the oil to drain from the engine while it sits and the oil pump may not be able to reprime itself at the next start-up.
    Check this "O" ring for diameter and installation.
            Part #8L2746
            Diameter .060-.070"(1.52-1.72 mm)
Caterpillar 3304 Camshaft & Balance shaft bearing Installation
    Before installing any bearings it is very important to make sure that the housing bore sizes are in tolerance:
    Camshaft Housing Bore
2.5620-2.5640"
65.075-65.125 mm
Balance shaft Housing Bore
2.2766-2.2786"
57.826-57.876 mm
    It is interesting to note that there are no oil holes located in the second and third cam bearing housing bores. However there is a hole in their bearing inserts ( this is non-functional ).
    The front bearing has 2 oil holes and the housing bore has a connecting groove for the lubricating oil galley. The front bearing should have the 2 oil holes horizontal for proper installation and the bearing joint pointed +/- 15 degrees from vertical.
    Only the front cam bearing bore of the three receives pressurized lubrication. Therefore it is important that when that bearing is installed that there be a clearance of .020" or .5 mm from the front block face.
    The rear bearings receive only the splash oil for lubrication. However it is still important that the hole in the bearing be facing toward the oil pan.
    In the case of the Balance shaft bearing it is vital that the oil holes line up with the block holes because these bearings do receive pressurized oil.
ISUZU 6SA1 & 6SA1T Valve Recess
We at Continental Diesel have recently been notified of changes in the valve recession for Isuzu 6SA1 & 6SA1T (turbo) starting with serial # 500830.
                Engine                Intake            Exhaust            Seat Angle            Valve Angle
              6SA1(all)         (-).063~.102"    (-).063~.102"      45 degree  I&E      45 degree  I&E

              6SA1T            (-).063~.102"    (-).063~.102"      45 degree  I&E      45 degree  I&E
            up to #500829

              6SA1T            (+).018" above  (-).063~.102"      30 degree Int.        30 degree Int.
            #500830 & up    (-).022" below                            45 degree Exh.      45 degree Exh.
                                                            IMPORTANT

Do not use the current spec. for the turbo engine on the non-turbo or

piston-valve contact may occur.
*We know our name is Continental Diesel.  And yes we can repair Continental Engine Components, but we regret that we are not Factory Representatives for Continental. So if you need something directly from Continental it is best to contact them.