1HDFT & 1HDFTE observations-discussion (1 Viewer)

AussieHJCruza

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Soot in intake isn't just a 1HDFT/FTE engine thing, it's an emissions diesel thing. Firstly, run a catch can to keep the oil out of it, and secondly if you can, throw the EGR in the bin and blank it off.

Second what's already been said about the various iterations:

Early 1HDT - piston crown cracks, especially if pushed hard with performance mods, plus the BEB problem
Later 1HDT - piston issues sorted. Still some BEB issues. 3 hours labour and a $60 set of bearings, it's cheap insurance.

1HD-FT - a bit of a dog in factory trim but easy fix with a bit of a play with the boost compensator. No internal issues, just keep on top of timing belt etc. As these are interference engines and not forgiving. Lose the emissions gear and install a decent turbo and fun times.

1HD-FTE - the best Diesel engine Toyota ever made. Similar comments to FT

These engines appreciate easy breathing (like any I guess) but the factory dump and exhaust is very restrictive. 3" from the turbo back gives you boost at least 300 rpm earlier.

Most people don't maintain the fuel system like they should. IMHO injectors should be looked at every 100,000 km and the pump at 300,000. A lot of times it won't seem to have anything wrong but from my experience you're leaving efficiency on the table by neglecting this. (Specifically mechanical engines rather than EFI) Seems the first part of the pump to wear is the advance mechanism, so as the RPMs increase the timing doesn't increase proportionally. This puts EGT through the roof and makes it very lazy.

On the FTE pumps there is a common fault when they have a manual trans behind where they will hold revs during a gear shift, quite annoying. Seems to be a calibration issue in (I think, @Indestructible 47 will confirm as this is one of his specialties) the spill control valve. The tolerance is incredibly tight and seems many rebuilders either don't know how or can't be bothered getting it right.

Sorry for the jumbled rave, hopefully makes some sort of sense
 
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Indestructible 47

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On the FTE pumps there is a common fault when they have a manual trans behind where they will hold revs during a gear shift, quite annoying. Seems to be a calibration issue in (I think, @Indestructible 47 will confirm as this is one of his specialties) the spill control valve. The tolerance is incredibly tight and seems many rebuilders either don't know how or can't be bothered getting it right.

This "rev hang" thing is a result of a fly by wire throttle and a basic ECU. It will never be as responsive as a throttle cable unfortunately, just nature of the beast.

I'm still researching the FTE IP, seems to be a common trait with rebuilt IPs that they prematurely give problems, related to the EFI side of things, the spill control valve ect. Although reliability isn't normally affected, it does become irksome to drive, especially with a manual trans.
 

Gun Runner 5

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@AussieHJCruza ..... “1HD-FTE - the best engine Toyota ever made. Similar comments to FT”.
———————————————————————————————-
(Not saying you are not correct but what is the above opinion based on?)
Thanks
 

AussieHJCruza

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@AussieHJCruza ..... “1HD-FTE - the best engine Toyota ever made. Similar comments to FT”.
———————————————————————————————-
(Not saying you are not correct but what is the above opinion based on?)
Thanks
Nothing particularly scientific, but more so observations from having hung around them for a while.

Bulletproof bottom end, very smooth power delivery, a lot less 'peaky' than the V8 and also consistently better fuel economy, along with much more affordable maintenance parts than a common rail engine, ie injectors etc.

Also if you're so inclined, 1000 rwnm without too much difficulty!
 

chapel gate

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Nothing particularly scientific, but more so observations from having hung around them for a while.

Bulletproof bottom end, very smooth power delivery, a lot less 'peaky' than the V8 and also consistently better fuel economy, along with much more affordable maintenance parts than a common rail engine, ie injectors etc.

Also if you're so inclined, 1000 rwnm without too much difficulty!
Yeah the maintenance costs are rarely mentioned.
I've had my FT for 16 years as my only vehicle. It now has nearly 310000 miles on the clock.
Engine untouched other than filters and belt changes.

Oh, I replaced the ACSD, which most people delete anyway and water pump at about 250000.
 

AussieHJCruza

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Yeah the maintenance costs are rarely mentioned.
I've had my FT for 16 years as my only vehicle. It now has nearly 310000 miles on the clock.
Engine untouched other than filters and belt changes.

Oh, I replaced the ACSD, which most people delete anyway and water pump at about 250000.
Yeah, agree 100%. I had injector troubles on my 1VD (knew it was coming up when I bought it so not exactly a suprise) and the cheapest I could get new Densos was about $650 AUD each, plus the top end gasket kit and fuel lines etc you need to replace at the same time. Toyota wanted about $1100 each for the genuine injectors. Ouch!
 

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