1HZ problem

[AtDp]

Hi, i'm a nub here.. Need a guidance for my LC 1HZ...

I installed CT26 + Intercooler at my 1HZ, run well for about 2months.. Then after 2months, if i WOT for about 5minutes my temp started to raise.
After i asked to my friend regarding this problem, he said i have to modify my internal parts with 1HDT parts. Thus i installed a new Piston, Piston Ring, Connecting Rod and Bore, all from 1HDT.

But after i installed all those parts, another problem occured... Everytime i starts my engine a lot of white smoke comes from my exhaust.

What should i do? What should i check?
Will be very appreciate any comments from my seniors.
Too bad i found this forum a little bit late.

Thanks,

[Kitika]

Are you losing coolant ? Sounds like mine when the head cracked...

[AtDp]

When the temp raised, checked Coolant ok...
And after i installed 1HDT internal parts, havent got a chance to try the temp again, coz he "white smoke" quite annoyed.

Today i checked my Compression, it's 22kgf/cm2...
I searched in this forum and found out there are people said the compression of 1HZ is 22, but at scribd, it's said 37...
Which one is the correct one?
How about mine??

Anyway thanks for your reply...

[Chucky]

Hi, i'm a nub here.. Need a guidance for my LC 1HZ...

I installed CT26 + Intercooler at my 1HZ, run well for about 2months.. Then after 2months, if i WOT for about 5minutes my temp started to raise.
After i asked to my friend regarding this problem, he said i have to modify my internal parts with 1HDT parts. Thus i installed a new Piston, Piston Ring, Connecting Rod and Bore, all from 1HDT.

But after i installed all those parts, another problem occured... Everytime i starts my engine a lot of white smoke comes from my exhaust.

What should i do? What should i check?
Will be very appreciate any comments from my seniors.
Too bad i found this forum a little bit late.

Thanks,

Dont about your mate, but I ran a 1hz Turbo intercooled engine at 16psi for years and never had a problem. I would have checked other things such as the thermostat, radiator for blocks, viscus fan hub (More than likely this) and water pump. Other things include too much fuel int eh pump, but the thick black smoke out the exhaust would give this away.

But since you rebuilt the thing, I'd get a pressure check down on the cooling system, did you get teh head crack tested while it was off?

[oldmate]

you installed 1hdt pistons into a 1hz? did you put the 1hdt head on too? The pistions are different for a reason. using the 1hdt ones with the combustion chamber pot in them has effectively decompressed your 1hz. white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

The advice you were given is wrong. more than likely high temps when underload is due to overfueling, or the fan clutch as mentioned

Things like the waterpump, thermostat etc should all have been in tip top shape before turboing at all.

My advice take it to a diesel injection specialist. 1hdt pistons and a 1hz head i've never heard of.

[oldmate]

I just checked the compression figures from the toyota manual.

a 1hz should be 37, a 1hdt should be 35. (the compression ratio on a 1hz is 22:1 which is where some get confused_)

the minimum factory spec for the 1hz is 27, so your way under.

Sounds like you really do have 1hdt pistons in there. the combustion pot plus the precomp chamber in the head has done it.

Take out the pistons and rods, put the 1hz stuff back in. Other option is to go full 1hdt with a new head, all the bits that go in it and injector lines etc to make it a proper 1hdt.

I'd be having stern words with your mate!

[AtDp]

Thanks for all your input...
I also believe the white smoke is from unburned fuel...
I will put back in my 1HZ internal parts, or buy 1HDT head if i can get with a good price.. :p

Once again thanks for all the information, specially to Oldmate..

[80's_delirious]

white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

Is this correct?
Engine speed and power is governed by the amount of fuel injected.Wouldnt excess fuel just cause the engine to run at higher RPM?
I thought excess fueling would show up as black smokey exhaust?

[80diesel4play]

white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

Is this correct?
Engine speed and power is governed by the amount of fuel injected.Wouldnt excess fuel just cause the engine to run at higher RPM?
I thought excess fueling would show up as black smokey exhaust?

I'm with you on this...

white smoke could also be air box pulling oil through or a seal gone in turbo so water coming in there until hot.

As for 1HDT into 1HZ = NQR - I beg to differ! I run 1HDT Bowled pistons, Rods, nitrided and balanced crank and get no white smoke at startup from my 1HZ. Engine built for the high PSI and comp lowered to suit - no head work other than opened up exhaust ports.

Also allot more required that just slap on a new head - you'll need pump changed, different cam, different elec's as well, injectors etc... say goodbye to $5k at least. better off checking the fan, pressure testing the head, check the water pump and check timing - these basics will all add up to figuring your issue and saving coin...

You may as well sell the 1HZ and just buy a 1HDT all done for about $8k and shove that in if you want...

It's all personal opinion and by no means is mine an expert at all! Just been my experience to date.

[AtDp]

white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

Is this correct?
Engine speed and power is governed by the amount of fuel injected.Wouldnt excess fuel just cause the engine to run at higher RPM?
I thought excess fueling would show up as black smokey exhaust?

I'm with you on this...

white smoke could also be air box pulling oil through or a seal gone in turbo so water coming in there until hot.

As for 1HDT into 1HZ = NQR - I beg to differ! I run 1HDT Bowled pistons, Rods, nitrided and balanced crank and get no white smoke at startup from my 1HZ. Engine built for the high PSI and comp lowered to suit - no head work other than opened up exhaust ports.

Also allot more required that just slap on a new head - you'll need pump changed, different cam, different elec's as well, injectors etc... say goodbye to $5k at least. better off checking the fan, pressure testing the head, check the water pump and check timing - these basics will all add up to figuring your issue and saving coin...

You may as well sell the 1HZ and just buy a 1HDT all done for about $8k and shove that in if you want...

It's all personal opinion and by no means is mine an expert at all! Just been my experience to date.

So you also put in 1HDT Crankshaft into your 1HZ?
Have you ever check your compression (after you install all 1HDT parts)?
And you also change your Pump (Injection Pump) and Cam (is it the cam inside the pump, or engine camshaft)?

The timing already checked 4-5times. But the pump still using 1HZ and the test calibration still using 1HZ data.

Thanks for sharing...

[80's_delirious]

white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

Is this correct?
Engine speed and power is governed by the amount of fuel injected.Wouldnt excess fuel just cause the engine to run at higher RPM?
I thought excess fueling would show up as black smokey exhaust?

I'm with you on this...

white smoke could also be air box pulling oil through or a seal gone in turbo so water coming in there until hot.

As for 1HDT into 1HZ = NQR - I beg to differ! I run 1HDT Bowled pistons, Rods, nitrided and balanced crank and get no white smoke at startup from my 1HZ. Engine built for the high PSI and comp lowered to suit - no head work other than opened up exhaust ports.

Also allot more required that just slap on a new head - you'll need pump changed, different cam, different elec's as well, injectors etc... say goodbye to $5k at least. better off checking the fan, pressure testing the head, check the water pump and check timing - these basics will all add up to figuring your issue and saving coin...

You may as well sell the 1HZ and just buy a 1HDT all done for about $8k and shove that in if you want...

It's all personal opinion and by no means is mine an expert at all! Just been my experience to date.

Are you using the 1hz fuel pump or 1hd-t??

Is the injection timing the same for both? could incorrect timing cause the symptons AtDp has?

[AtDp]

white smoke is unburned fuel. My guess it's not enough compression for the amount of fuel injected on start up.

Is this correct?
Engine speed and power is governed by the amount of fuel injected.Wouldnt excess fuel just cause the engine to run at higher RPM?
I thought excess fueling would show up as black smokey exhaust?

I'm with you on this...

white smoke could also be air box pulling oil through or a seal gone in turbo so water coming in there until hot.

As for 1HDT into 1HZ = NQR - I beg to differ! I run 1HDT Bowled pistons, Rods, nitrided and balanced crank and get no white smoke at startup from my 1HZ. Engine built for the high PSI and comp lowered to suit - no head work other than opened up exhaust ports.

Also allot more required that just slap on a new head - you'll need pump changed, different cam, different elec's as well, injectors etc... say goodbye to $5k at least. better off checking the fan, pressure testing the head, check the water pump and check timing - these basics will all add up to figuring your issue and saving coin...

You may as well sell the 1HZ and just buy a 1HDT all done for about $8k and shove that in if you want...

It's all personal opinion and by no means is mine an expert at all! Just been my experience to date.

Are you using the 1hz fuel pump or 1hd-t??

Is the injection timing the same for both? could incorrect timing cause the symptons AtDp has?

I'm still using 1HZ Fuel Pump...
Timing already checked several times, all the marking already aligned...
I already make sure, engine camshaft gear and pump gear both are at BDC, and turn to make sure engine Crankshaft pulley and pump gear both are at TDC...
Do i use the correct method?