2.8t 4JB1T problems

[Cambo]

I've just replaced the timing belt on a mates Bighorn that broke the belt and damaged a few push rods and broke 1 rocker.

Got it all together, with new parts, and it won't start/run. Blows heaps of white smoke out the exhaust when cranking.
Triple checked all the marks line up OK & double checked the valve clearances.
Got it to start and run for a very short time only. Tons of white smoke out the back. Haven't managed to get it to run again.

Any hints or tips please?

[Cambo]

I'm hoping it hasn't bent any valves

[geeves]

sounds like timing out.
Did you do the belts with the locating bolts in the pulleys?

[Cambo]

With the original belt being broken I had to turn the pulleys over (all in the correct direction) till they lined up.
And yes, I locked the pulleys in place once at the right positions.

[Cambo]

Found this pic on here somewhere.... and used that to align marks.

[Cambo]

1 thing I have noticed in the cam and injector pulleys is small arrows stamped into the pulley edges.
The cam arrow, when locked up in position, points down toward the crank at approx the 4oclock position. The injector pump pullet mark is also at approx the 4oclock position when the lock bolt is in place.

The manual I was using didn't show these marks at all.
Are they supposed to be aligning with anything?

[turnturn]

Did you align the mark on the crankshaft timing pulley and the mark on the timing pulley housing?

[Cambo]

Sure did

[turnturn]

I just looked at some pictures of when I had an engine out to do some repairs. Those small marks are in the same positions as you mention.....

[Cambo]

I have found a diagram for the timing marks from AutoData and it shows the lock bolts in the cam and IP pulleys in the 4 O'clock position.
Don't know if this is correct or not, but the Isuzu manual shows them in the 2 o'clock position and I'm more inclined to believe the manufacturer over aftermarket
info.

[geeves]

there is only one hole in each pully and one hole in the block to match. The cranck pully also should have a matching bolt hole

[isuzurob]

as per the picture, that is correct, crank pulley has a notch in it and matches abit in the block and the keyway faces up

[Cambo]

Yeah that's what I found as well. There's only the 1 position for the pulleys to go.
So timing is correct......just got to do a comp and leak down on it now.

[Cambo]

Did a compression and leak down tests on the engine. All OK on those fronts.

I now need to have another go at timing it up.
Somewhere along the way it must have been set up differently than what the factory manual shows.
I'm going to have to static time it to see where the injection pump needs to be.

[isuzurob]

doing static timing with a dti gauge will definatley tell you if the pump is timed correctly, 1 tooth out on the pump makes them smoke and rattle alot

[Cambo]

It should still run though eh.
So it must be really out if it won't even start.

[Cambo]

Static timed the POS today.
Just to get it correct I had to advance the injector pump timing by 2 teeth. Loosening the pump and twisting it either way did nothing. (I wonder if there is an underlying problem with the pump.)
So I had to remove the timing belt and advance the pump 2 teeth.
Got it running anyway.
Just have to finish putting it together now.

[turnturn]

Bit of a long shot but does the Injector Pump/Pulley have its key fitted?

[Cambo]

Yeah, it did.

[geeves]

Was it tight?
If the wrong crank bolt has been undone they have a habit of wearing the keyway but not 2 teeth worth