1. What causes stem valve damage on the DD13 engine?
DD13 stem valve damage due to poor lubrication, incorrect valve lash adjustment, excessive heat, damaged valve guide and valve seat, and contaminated oil.
2. What are the signs of a bent valve stem in DD13?
These are the signs;
a. Low compression in one cylinder
b. Popping noise coming out of the intake or exhaust
c. Engine misfiring
3. How long does the DD13 turbo last?
The turbo can last up to 500,000 miles or more. However, that depends on some factors such as the quality of oil, working conditions, and the maintenance culture.
4. What maintenance can help prolong the life of a DD13 turbo?
These are maintenance tasks that can help you prolong the life of your turbo.
a. Avoid running the engine on idle for too long
b. Avoid air filter clogged
c. Use recommended oil and regularly change the oil filter and oil.
d. Allow the engine to cool off before you shut it down.
5. What is the average lifespan of the DD13 injectors?
The injectors can average between 300,000 to 500,000 miles, depending on these three conditions, such as fuel quality, maintenance, and operating conditions.
6. What are the symptoms of failing injectors on the DD13 engine?
These are the signs of failing injectors;
a. Knocking sound from the engine
b. Engine not starting or hard starting
c. Black smoke or white smoke from the exhaust
d. Rough idling
e. Misfiring
f. Increase fuel consumption
7. Can DD13 cylinder head bolts be reusable?
The answer is no. The DD13 bolts are torqued to yield, so they cannot be reused.
8. How many cylinder head bolts are on the DD13 engine?
The engine has 38 main bolts in addition to other smaller bolts. These 38 bolts are used to secure the cylinder head to the engine block.
9. Where is the location of the oil pump in the DD13 engine?
The oil pump is located at the front of the engine. It is together with the gear assembly; it is at the lower part of the gear, and it is driven by the crankshaft because it is a mechanical oil pump.
10. Can the oil pump of DD13 be upgraded?
The answer is no. The oil pump should not be modified because the oil pump meets factory specs under all types of load conditions.