1hd-ft swapped 80 with high get

[flnalrt]

Background on the truck. 1996 fzj80 swapped with a non egr 1hd-ft and A442f. The head was resurfaced, injection pump rebuilt, new water pump, motor resealed, and numerous other new Toyota Parts. Since the swap, the EGTs would easily reach 1250-1400 if you wanted to stay in the throttle. If the truck touched those numbers I would instantly let out of the throttle. Also, I feel that the truck is extremely low on power. Truck is back in the shop and the current mechanic can't determine what is causing these numbers. I believe the injection pump timing is correct. I understand that a intercooler would help but can't understand why a stock motor would hit these numbers. Any help? Would a bigger turbo help? Recommendations/guidance appreciated.

 

[Musafir]

where is the probe?

 

[Musafir]

where is the probe?

By in the throttle do you mean pedal to the metal. At what speeds?

 

[flnalrt]

where is the probe?

Manifold

 

[flnalrt]

By in the throttle do you mean pedal to the metal. At what speeds

 

[flnalrt]

By in the throttle do you mean pedal to the metal. At what speeds?

Not on the floor. It really depends on the situation. If I'm on a hill it will hit high egts if I continue with the throttle.

 

[Eurasiaoverland]

How was the timing set and how are you checking it?

 

[flnalrt]

How was the timing set and how are you checking it?

Not sure how they checked the timing but he told me it was good. I left the Toyota specialty tool with them to check timing. The mechanic was more concerned with the head being resurfaced and the injectors not being adjusted for the material removed. Something about the combustion. When he went down this road he lost me.

 

[Eurasiaoverland]

Not sure how they checked the timing but he told me it was good. I left the Toyota specialty tool with them to check timing. The mechanic was more concerned with the head being resurfaced and the injectors not being adjusted for the material removed. Something about the combustion. When he went down this road he lost me.

I'm not familiar with the 1HD-FT, but I expect there should be a scribed line on the mounting flange of the pump where it is bolted onto the rear timing cover. If those marks are way off, it's a good sign that the timing is off.

A mechanic experienced with diesels should not have had an issue using the SST, so long as they get the TDC point correct on the engine. Still worth checking. If it's a regular mechanic unused to diesels, all bets are off.

The injectors fire into the cups on the pistons so a tenth of a millimetre taken off the head will have zero effect.

 

[Musafir]

I could be wrong but after doing a quick search those numbers seem to be normal under load. On flat ground at around 70-80mph should be around 500-600C.

 

[flnalrt]

I could be wrong but after doing a quick search those numbers seem to be normal under load. On flat ground at around 70-80mph should be around 500-600C.

Everything I've read says 1250. I could be wrong. I just don't want to cause the engine issues.

 

[Dougal]

How much boost have you got and how does the engine sound?

High EGT is normally an air-flow restriction or excessive fuel. Timing has to be way out to cause an EGT problem and always has other symptoms.

 

[flnalrt]

How much boost have you got and how does the engine sound?

High EGT is normally an air-flow restriction or excessive fuel. Timing has to be way out to cause an EGT problem and always has other symptoms.

Boost is normal around 12. I have noticed that the engine has a high turbo sounds with any throttle. More so than other Toyota diesels I’ve heard. I do have a 3” exhaust straight piped.

 

[AirheadNut]

Based on my experience with a stock 1HD-T I'd say 1250-1400ºF under sustained load is normal for these engines. An intercooler and some added boost without adding fuel will really cool things down. My brother now owns the 1HD-T that I had, he intercooled it, put in an aftermarket aneroid pin and turned the boost up to about 16psi. It runs a little too smoky and hot now, will still hit mid 1300's on a hill if you keep on the throttle, but has way more power than it did in stock form. A bit more tuning should bring the smoke and temps down while keeping the power gains.

Excessive turbo whine could indicate a failing turbo, is yours still the original unit? Would be worth pulling the intake hose off and checking for play in the turbine shaft, both axial (in and out) and radial. Some radial play is ok as long as the turbine blades don't touch the sides of the housing. Axial play should be minimal, you should barely be able to feel it by hand.

 

[SNLC]

To much fuel. Tune pump, check and set timing.

A dragging brake caliper can also cause high EGT due to the engine working harder. MPG will suffer as well and rotor/hub will get real hot.

Cheers

 

[flnalrt]

Based on my experience with a stock 1HD-T I'd say 1250-1400ºF under sustained load is normal for these engines. An intercooler and some added boost without adding fuel will really cool things down. My brother now owns the 1HD-T that I had, he intercooled it, put in an aftermarket aneroid pin and turned the boost up to about 16psi. It runs a little too smoky and hot now, will still hit mid 1300's on a hill if you keep on the throttle, but has way more power than it did in stock form. A bit more tuning should bring the smoke and temps down while keeping the power gains.

Excessive turbo whine could indicate a failing turbo, is yours still the original unit? Would be worth pulling the intake hose off and checking for play in the turbine shaft, both axial (in and out) and radial. Some radial play is ok as long as the turbine blades don't touch the sides of the housing. Axial play should be minimal, you should barely be able to feel it by hand.

Thanks for the information. I had the opportunity to drive the truck out West over the summer and was able to drive through Whitefish on the way to Glacier. Great area.

 

[flnalrt]

To much fuel. Tune pump, check and set timing.

A dragging brake caliper can also cause high EGT due to the engine working harder. MPG will suffer as well and rotor/hub will get real hot.

Cheers

Thanks for the information. I'm leaning toward this even though the pump was rebuilt. The mechanic looking at the truck is concerned with the smell from the exhaust and worrying about a combustion chamber issue.

 

[mudgudgeon]

Is the mechanic familiar with diesels? Like, well experienced? Or more like, "yeah, we can bolt it together for ya"?

You shouldn't be feeling a lack of power with 12psi boost and the EGTs you're seeing.

Does it chug dark smoke when accelerating?

Pump tuning requires a lot more finesse than just dumping in fuel.

1400⁰f is widely considered a safe maximum EGT with the probe in the manifold. Realistically, they are safe to quite a bit higher temps, but 1400⁰f is within a normal range.

Turbo shouldn't be noisy either.

 

[Eurasiaoverland]

So far, with your mechanic being worried about injector tip protrusion and talking about combustion chambers, I suspect he's not at all familiar with your engine.

 

[AirheadNut]

Another thing to note: these engines don’t have separate combustion chambers like IDI diesels do, they use a depression in the top of the piston instead. You won’t have “combustion chamber issues” without major piston damage.