Cranks but will not start?

SCIONDLIGHT

MEMBER
2008 SCION XB
2.0L
150,000 MILES

Blew head gasket, replaced it as well as the water pump. I have spark gas, and compression. At first crank engine tries to start but doesn't. Every crank after that it just turns over but makes no effort in starting. I was told the computer needs to be reprogrammed. Doing that now. If that doesnt work, is there any other possibilities you can help me out with. It sat for 6 months before new gasket was installed. And it did start before head was removed.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Hi,

Are you certain that the timing chains were installed correctly? I know they had to be removed to take the head off. Also, is it possible for you to record the engine cranking so I can hear it?

I am going to provide the components related to timing chain alignment. Check through everything and let me know if all marks correlate with what you did.

__________________________

2008 Scion xB L4-2.4L (2AZ-FE)
Components
Vehicle Engine, Cooling and Exhaust Engine Timing Components Timing Component Alignment Marks Locations Components
COMPONENTS
CAUTION: Incorrect removal or installation of the timing chain can result in damage to internal engine components.

NOTICE: For complete replacement and installation procedures for the timing chain, please refer to Engine; Service and Repair. See: Engine > Service and Repair

NO. 2 CHAIN SUB-ASSEMBLY

pic 1

(a)Set the crankshaft key in the left horizontal position.

Pic 2

(b)Turn the cutout of the drive shaft so that it faces upward.
(c)Align the yellow mark links with the timing marks of each gear as shown in the illustration.
(d)Install the sprockets onto the crankshaft and oil pump shaft with the chain wrapped on the gears.
(e)Temporarily tighten the oil pump drive shaft sprocket with the nut.

Pic 3

(f)Insert the damper spring into the adjusting hole, and then install the chain tensioner plate with the bolt.
Torque: 12 Nm (122 kgf-cm, 9 ft-lbf)

pic 4

(g)Align the adjusting hole on the oil pump drive shaft sprocket with the groove on the oil pump.
(h)Insert a 4 mm diameter bar into the adjusting hole on the oil pump drive shaft gear to lock the gear in position, and then tighten the nut.
Torque: 30 Nm (301 kgf-cm, 22 ft-lbf)

pic 5

CHAIN SUB-ASSEMBLY
(a)Set the No. 1 cylinder to TDC/compression.

Pic 6

(1)Turn the camshafts with a wrench (using the hexagonal lobe) to align the timing marks on the camshaft timing gear with the timing marks located on the No. 1 and No. 2 bearing caps as shown in the illustration.

Pic 7

(2)Using the crankshaft pulley bolt, turn the crankshaft to position the key on the crankshaft upward.

Pic 8

(b)Install the chain onto the crankshaft timing sprocket with the gold or orange mark link aligned with the timing mark on the crankshaft.

Pic 9

(c)Using SST and a hammer, tap in the crankshaft timing sprocket.
SST: 09309-37010

pic 10

(d)Align the gold or yellow links with the timing marks located on the camshaft timing gear and sprocket, then install the chain.

________________________-

Let me know. Also, if possible record so I can hear what it is doing.

Take care,
Joe

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