August 2023 - 41

PROBLEM SOLVED
It took several minutes of extended
cranking before it fired off, running
rough until it worked all the air out of the
fuel system. Once that worked itself out,
it ran smoothly and, most importantly,
quietly. We let it run for several minutes
to get some heat to build up before we
took the time to remove the valve and
rocker covers to recheck the valve clearances
one last time.
Our techs installed a new condenser,
radiator with isolator bushings, accessory
mounting plate, cooling fan blade,
fan hub with clutch, alternator, A/C compressor,
and, finally, the serpentine belt
and new tensioner.
After adding water to the cooling system,
we fired it off once more and let it
build to operating temperature, checking
for any sign of leaks, and listening for anything
that didn't sound happy. Our process
is to run it this way, with only water
in the system, and to use our Pittsburgh
coolant pressure tester quite a few times
before we drain the system completely and
fill it with extended-life coolant. This way
we are likely to catch any leaks without
losing much expensive coolant.
Once filled with coolant, we let it
run for about 45 minutes, performing a
vacuum and leak test on the A/C system
using our Robinair 32700Z machine
again before charging it up to capacity.
Last in the process is to road test the unit
p Before disassembly - Exhaust leaks are at the manifold behind the turbo assembly.
Photo courtesy of Eric Moore
were involved to get through the different
lengths and sizes of new bolts.
Fortunately, one of our techs had purchased
a Snap-on 1/2 " digital torque
wrench with an angle meter. We went
through the process twice making sure
we followed the diagrams and directions
we found on Google and YouTube.
Pushrods came next, and with a Snapon
3/8 " digital torque wrench, we started
snugging up the rocker arms and tappets.
We followed the valve clearance adjustment
procedure as outlined and rotated
the assembly after each adjustment while
rechecking clearances several times before
locking down the tappets and installing
the injectors, rocker, and valve covers.
Afterward, we installed the manifolds,
turbo, and related hoses and piping.
One of the techs drained the existing
engine oil, removed the filters, and
refilled it with fresh synthetic 5W40.
Once the fuel system was primed, it was
time to hear it run.
and feel for any vibrations or loss of power
that could indicate there are other items
needing to be addressed. This one passed
without additional attention needed.
ERIC MOORE began his
career working on cars at
several franchise dealerships.
Initially, he leaned towards
smaller vehicles, settling into
Powersports vehicles, where he stayed for
over 20 years. Then, Moore went the total
opposite direction, landing at a medium and
heavy duty truck dealership. Eventually, he
moved into management and has performed
most roles at the dealership level except for
owning his own franchise. Currently, he is the
fleet manager at Griffin Pavement Striping,
belonging to the Frontline Road Safety group
of companies.
www.VehicleServicePros.com AUGUST 2023 PROFESSIONAL TOOL & EQUIPMENT NEWS 41
http://www.VehicleServicePros.com
August 2023

Table of Contents for the Digital Edition of August 2023
