TiD and TTiD engines: what it stands for and its performance parameters

TiD and TTiD engines: what it stands for and its performance parameters

TiD and TTiD engines are diesel engines with direct fuel injection. They were installed on Saab vehicles from 1998 till 2012. The TiD abbreviation stands for Turbo Injected Diesel and marks that the engine is equipped with a single turbocharger. TTiD or Twin Turbo Injected Diesel indicates that the engine is twin-turbocharged. The first TiD engine appeared in 1998 and was installed on the Saab 9-3. Versions equipped with the TTiD engines were released in 2007. Almost all of these engines were produced by General Motors. Some were developed in cooperation with other manufacturers, for instance, Isuzu Motors.

Features of TiD and TTiD engines

TiD and TTiD engines have a cast iron engine block and aluminium cylinder head. Most of them are equipped with the Common Rail fuel injection system. However, there are versions without a fuel rail, where the fuel delivered by the pump is supplied directly to the fuel injectors. The valve timing mechanism usually uses a belt; a chain is less common.

Popular TiD and TTiD engines

Name Code Engine capacity, l Number and arrangement of cylinders Numberof valves Max. output, hp Max. torque, Nm Production start Saab models equipped with this type of engine
TiD D223L (X22DTH) 2.2 inline-four 16 115 260 1998 9-3;
TiD D308L 3.0 V6 24 170 350 2001 9-5;
TiD Z19DTH 1.9 inline-four 16 150 320 2004 9-3;
TTiD Z19DTR 1.9 inline-four 16 180 400 2007 9-3; 9-5;
TiD Z19DT 1.9 inline-four 8 120 280 1998 9-3; 9-5;
TiD A20DTH 2.0 inline-four 16 170 350 2010 9-5

Common malfunctions of TiD, TTiD engines

Malfunctions  Engines
The fuel system is prone to airlocking. X22DTH (D223L).
The diesel particulate filter and EGR valve get clogged fast. X22DTH (D223L); Z19DTH.
The crankshaft pulley breaks down early. X22DTH (D223L).
Engine oil can get into the fuel when the washers mounted under the fuel injectors dry out. X22DTH (D223L).
The high-pressure fuel pump’s electric components often become unusable. X22DTH (D223L).
Swirl flaps of the intake manifold can easily break down. Z19DTH; A20DTH.
The exhaust manifold deforms at high temperatures. Z19DTH.
The crankshaft’s main bearings get damaged when lacking oil, which leads to jamming of the engine at high RPMs. A20DTH.
The seals of the engine oil cooler begin to leak quickly. A20DTH.
Unstable RPMs can be caused by a soiled fuel control valve. A20DTH.
The engine block is sensitive to overheating. D308L. 

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