Pontiac Fiero 1988 Service Manual page 363

6B-14 ENGINE COOLING
BEND FOUR
C L I N C H T A B S
H20016 6B
Figure 24 Seating Tank to Core
10. Clamp remaining clinch tabs around the header
using the clinching tool or pliers (Figure 25).
H20017 6B
Figure 25 Clinching Sequence
NOTICE:
Tighten the clinch tabs as you would
cylinder head bolts, starting at the center and
working out to the ends.
11. Replace the core if there are more than three
tabs broken on one side or two adjacent tabs
broken.
12. Install the drain cock, if removed.
13. Test the radiator for leaks.
OIL COOLER GASKET REPLACEMENT
The outlet tank must be removed to replace the
oil cooler, but the oil cooler gaskets can be replaced
without removing the tank.
1. Remove the radiator and lay it on a flat surface.
2. Remove the bottom oil cooler nut and loosen the
top nut.
3. Press the oil cooler into the hole and remove the
gasket using a small hook (Figure 26).
4. Blow-dry all surfaces on the tank and oil cooler.
5. Install a new gasket without lubrication. Be
sure it is seated properly inside the lip of the
- fitting.
6. Reach into the inlet or outlet opening and push
the oil cooler into position against the tank.
Figure 26 Removing Oil Cooler Gasket
7. Assemble the oil cooler nut loosely.
8. Replace the other gasket by following the same
procedure.
9. Install the oil cooler nuts and torque to 20 Nnn
(15 lb. ft.). Do not overtighten, as damage to
the gasket could result.
10. Leak-test the radiator.
OIL COOLER REPLACEMENT
1. Remove the outlet tank as previously outlined.
2. Remove nuts from the oil cooler fittings.
3. Remove oil cooler and gaskets from tank.
4. Remove old rubber gaskets, throw away, clean
and dry seal areas.
5. Place rubber gaskets on a new oil cooler and
place onto outlet tank fitting holes, being careful
not to loosen or misalign gaskets. Gaskets must
be installed dry and free of dirt and oil.
6. Install and tighten nuts snugly onto fittings.
7. Torque nuts to 20 Nnn (15 lb. ft.). Overtorquing
could cut the rubber gaskets.
8. Replace tank as previously described.
9. Test radiator.
RECORE
If the radiator core is damaged beyond repair
and the other parts are serviceable, install the original
inlet and outlet tanks, oil cooler, radiator cap, and
drain valve, onto a new core and install new gaskets.
DRAIN COCK
If the drain cock does not seal when tightened
snugly, remove the drain cock, clean drain and
replace. If the body of the draincock is broken,
remove the body from the tank by squeezing the sides
together with needle nose pliers (Figure 9).