C6.6 Diesel Used Engine Blocks For Excavator E320D E320D2 Water
Cooling
Specification
| Car name: Engine cylinder block |
| Model Number: C6.6 |
| Engine type: Diesel |
| Application: Excavator |
| valve: 24 valve |
| Cooling: Water cooling |
| Injection: Electric |
| Work form: Turbo |
Description
Pinning Techniques
The final step in a cold crack repair is to peen over the tops of
the pins or plugs with a blunt tool bit in an air hammer. Peening
deforms the tops of the pins and helps blend them into the
surrounding metal. Peening also compresses the upper threads for a
leak-free seal. The pins can then be ground flush as needed,
followed by more peening to make an almost invisible repair.
Once the repairs have been completed on a cylinder head, the head
should again be pressure tested to make sure there are no leaks. If
there are small leaks, they can often be fixed by additional
peening and/or installing additional pins. Also, don’t use too much
air pressure to retest a head as this may push out the thread
sealer before it has fully cured.
Welding Options
irontite_tapered_plugs_1If a cracked head or block can’t be
repaired by filling the cracks with pins or plugs, welding is
another option. For cast iron heads, this includes furnace welding,
flame spray welding or brazing. With aluminum heads, it would be
TIG welding.
Furnace welding requires a skilled welder and preheating the head
in an oven to 1,000 to 1,400 degrees F (medium red color). The head
must be perfectly clean and the valve guides, seats and any studs
should be removed prior to welding. The crack must also be ground
out all the way to the water jacket to accept filler rod (which
should be the same alloy as the head).
The welding is done with an acetylene torch and a neutral flame.
After the crack has been filled, the head must be wrapped in an
insulating blanket to prevent it from cooling too quickly (which
could result in hard spots or additional cracking). The rate of
cooling should not exceed 200 degrees F per hour, so it should take
6 to 7 hours to cool back down to room temperature.
