Balance shaft timing and noise?

Hello,

Thanks for the video and diagrams to help us see what you are talking about. The balance shaft with the two gears looks like it is causing the issue it should not move that much. I would replace the unit and reassembly.

Please let us know what happens.

Cheers, Ken

When you have the engine apart grab each one of the rods and try to move them on the crank you may have a spun rod bearing as well. Can you take a video of the noise so I can hear it? Upload it here in your response. Also, look at the timing chain guides a loose chain can cause this as well.

Man, that is not messaging around. Please remove the serpentine belt and recheck. If the same that noise sounds more like a chaining chain issue. Also, does the noise change or go away when you put the car in gear or reverse? You replaced the balance shaft unit correct?

Yep, that sounds like you have a timing chain that is stretched and tension-er that is not working or the guide that is broken. I assume it makes the same noise with the serpentine belt off. Here are diagrams to show you what you are in for when doing the job.

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

The guide that is off is where I would look first it is supposed to be perfectly aligned. I would take off the timing cover so we can look to see what is going on. We are getting closer. :)

It sounds like you found the problem get the guides, chain and tension-er. Also, you you made sure the oil pump pick up is clear?

Yes, everything in those videos looks worn and needs to be replaced. Make sure the oil pick up is clear, I would take it off and clean it thoroughly.

I think what i'e sent is what you need it's all we have. We do have another with a paint mark but not sure that is it.

The last pic is a balance shaft and the dots need to line up the center pic is the balance shaft gears installed if you look closely there are a cople more dots that look like they line up with something on the drawing. Unfortunately this is all we have oin our manuals so i'm sending what we had.
Hereare instructions maybe this will help.
Installation

1. Rotate the driven gear No. 1 of balanceshaft No. 1 for the rotating direction until it hits the stopper.
2. Confirm that the matchmarks on driven gear No. 1 and No. 2 are matched.

Fig. 32: Matching Matchmarks
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.

3. Align the timing marks of the No. 1 and No. 2 balanceshafts as shown.
4. Place the No. 1 and No. 2 balanceshafts on the crank case.
5. Apply a light coat of engine oil under the heads of the balanceshaft housing bolts.

Fig. 33: Aligning Timing Marks
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.

6. Uniformly tighten the 8 bolts in the sequence shown.

Torque:Â 22Â N.MÂ (220Â kgf. Cm, Â 16Â ft. Lbf)

HINT:

The balanceshaft housing bolts are tightened in 2 progressive steps.

Fig. 34: Tightening Balanceshaft Housing Bolts In Sequence
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.

7. Mark the front side of each balanceshaft housing bolt head with paint.
8. Retighten the bolts by 90° as shown.
9. Check that the painted marks are now at a 90° angle to the front.

Fig. 35: From Front Position Turn Paint Marked Bolt 90°
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.