engine tune up and noise from Pzj70

[john_d]

I've recently changed the timing belt (part no. 13568-19065) and the idler sub-assembly(part no.13505-17011) also known as the timing tensioner bearing, I think, on my Pzj70. The vehicle has travelled 150,000 kms. I've made the above replacements as a precautionary measure, even though the previous owner claimed to have changed the timing belt at 100,000 kms.

Are these the correct parts for my vehicle? And according to the mechanics and contrary to a post on this site the pz engine doesn't have a tensioner spring but a bearing. Is this true?

Secondly, the mechanics at the toyota garage also did a tappet adjustment. They said that six "sims" needed replacement. After this, I expected the engine to run smoother and more powerfully. However, that hasn't been the case. Instead I hear a faint but noticible tapping noise, which is constant in it's beat, while I'm on the road.

Thirdly, the toyota mechanics also adjusted the rate of fuel flow from the pump into the engine. They however didn't do this with any instrumentational aid. They only said that the fuel flow can be adjusted to increase or decrease the power and fuel efficiency. I was not convinced. How is the rate of fuel flow from the pump to the engine calibrated? And what parameters are taken into account?

Since I don't have access to the owner and repair manuals I'm at a total loss!

Thank you.

 

[Japan4X4]

I've recently changed the timing belt (part no. 13568-19065) and the idler sub-assembly(part no.13505-17011) also known as the timing tensioner bearing, I think, on my Pzj70.

Are these the correct parts for my vehicle? And according to the mechanics and contrary to a post on this site the pz engine doesn't have a tensioner spring but a bearing. Is this true?

The part numbers are correct.

 

[roscoFJ73]

I've recently changed the timing belt (part no. 13568-19065) and the idler sub-assembly(part no.13505-17011) also known as the timing tensioner bearing, I think, on my Pzj70. The vehicle has travelled 150,000 kms. I've made the above replacements as a precautionary measure, even though the previous owner claimed to have changed the timing belt at 100,000 kms.

Are these the correct parts for my vehicle? And according to the mechanics and contrary to a post on this site the pz engine doesn't have a tensioner spring but a bearing. Is this true?

It has a tensioner spring to pull the bearing in the idler mechanism tight. I replace mine as an entire kit with the new belt.

Secondly, the mechanics at the toyota garage also did a tappet adjustment. They said that six "sims" needed replacement. After this, I expected the engine to run smoother and more powerfully. However, that hasn't been the case. Instead I hear a faint but noticible tapping noise, which is constant in it's beat, while I'm on the road.

That is spelt "shims".They use them to adjust the valves. It wouldnt necessarily make a big difference,not to mine anyway and it hadnt been done for some time.
I dont know what the tapping could be.

Thirdly, the toyota mechanics also adjusted the rate of fuel flow from the pump into the engine. They however didn't do this with any instrumentational aid. They only said that the fuel flow can be adjusted to increase or decrease the power and fuel efficiency. I was not convinced. How is the rate of fuel flow from the pump to the engine calibrated? And what parameters are taken into account?

They are correct and this is the normal way. If it blows too much smoke they turn it down.If it feels underpowered they turn it back up until they get black smoke and wind it back again.
You can do it yourself if you turn it 1/8 th at a time.Note your starting point.
However its best done after the pump has been serviced and all the other internal pump settings have been calibrated.
My shop put the back wheels on a dyno and dial in the fuel settings until they get max power with no smoke.