1. Where is the thrust washer located in the DD15 engine?
It is typically located at the rear side of the crankshaft, which is the #7 main bearing cap, and attaches to the crankshaft flange.
2. What are the symptoms of a worn thrust washer in DD15?
These are the signs of worn thrust washers;
a. Too much crankshaft endplay
b. In manual transmission, it causes difficult shifting
c. Unusual noise from the engine
d. Frequent wear on crankshaft bearings.
3. What are some Symptoms of a failed oil seal in the DD15 engine?
These are the following signs you will notice;
i. Oil splatter in the engine bay
ii. Sudden oil consumption
iii. Oil leaks around the flywheel housing and crankshaft pulley
iv. Visible oil leaks
4. How long does the DD15 oil seal last?
The oil seal of the DD15 could last as long as 400,000 to 700,000 miles. But you should replace it during the engine rebuild and whenever you notice oil leaks around the crankshaft on both ends.
5. How many rubber liners are used in the cylinder liners of the DD15 Engine?
Typically, the engine uses two-liner rubber to seal coolant from going down to the oil sump. This is referred to as a dual-seal system to prevent oil contamination.
6. What could cause cylinder liner rubbers to fail?
a. Overheating
b. Liner movement
c. Tear and wear, which is age-related
d. Incorrect installation
7. Can aftermarket pistons be used in the DD15 engine?
Yes, aftermarket pistons can be used as long as it meets the OEM standard. What matters is the quality of the piston; a high-quality aftermarket can also serve you better.
8. What cools the piston in the DD15 engine?
The engine uses an oil jet, simply called a piston cooler jet. It’s also called an oil squirter. It is located under the piston, and it injects oil into the piston to cool the piston.
9. Can you replace only one piston in DD15?
Yes, you can but it is not recommended to change one piston. Rather, you should change all six pistons to have balance.
Changing all the pistons will also help you to ensure consistent wear and performance.
10. When should the piston be replaced in DD15?
The piston should be replaced during the engine’s major overhaul. The major overhauling could be between 750,000 to 1,000,000 miles depending on the operating conditions of the engine.